JET CARTRIDGES FOR JETTING FLUID MATERIAL, AND RELATED METHODS

A jet cartridge for jetting fluid material includes a body adapted to receive fluid material, and a fluid passage defined within the body and extending along a longitudinal axis thereof. At least a portion of the fluid passage extends obliquely relative to the longitudinal axis. The body is adapted to receive heat from a heating element and to transfer the heat to the fluid material flowing through the fluid passage. A method of jetting fluid material with a jet dispenser including a jet cartridge includes receiving fluid material into the jet cartridge, directing the fluid material through the jet cartridge along a longitudinal axis thereof and obliquely relative to the longitudinal axis, heating the fluid material directed through fluid cartridge to a target temperature, maintaining the target temperature as the fluid material enters a nozzle, and jetting the heated fluid material through the nozzle. 1. A jet cartridge for jetting fluid material , comprising:a body adapted to receive fluid material; anda fluid passage defined within the body and extending along a longitudinal axis thereof, at least a portion of the fluid passage extending obliquely relative to the longitudinal axis,wherein the body is adapted to receive heat from a heating element and to transfer the heat to the fluid material flowing through the fluid passage.2. The jet cartridge of claim 1 , wherein the fluid passage extends at least partially circumferentially about the longitudinal axis.3. The jet cartridge of claim 1 , wherein the fluid passage includes a spiral portion that extends about the longitudinal axis.4. The jet cartridge of claim 3 , wherein the spiral portion extends at least 360 degrees about the longitudinal axis.5. The jet cartridge of claim 1 , wherein the body includes an outer body and a flow insert received within the outer body claim 1 , the fluid passage being defined between the outer body and the flow insert.6. The jet cartridge of claim 5 , wherein at least one of the ...

Dispenser and method of dispensing and controlling with a flow meter

Systems and methods related to dispensing fluid and controlling a dispensing operation. The system includes a fluid dispenser including an inlet and an outlet, the dispenser being operable to start and stop the flow of the fluid from the outlet onto a substrate. A fluid supply reservoir adapted to hold the fluid, and having an outlet coupled in fluid communication with the inlet of the fluid dispenser to establish a flow path for the fluid between the fluid supply reservoir and the outlet of the fluid dispenser. The fluid supply reservoir further includes a pneumatic input coupled to an air flow path adapted to receive pressurized air for forcing the fluid from the outlet of the reservoir. An electronic air mass flow meter device is operatively coupled to the air flow path to produce electrical output signals proportional to the mass flow rate of the air flowing through the pneumatic input. Components and methods are provided to accurately determine the volume of the fluid in the reservoir, and to set the stroke length of a valve used in the system.

Flow metering for dispense monitoring and control

Methods and systems of accurately dispensing a viscous fluid onto a substrate. In an embodiment, a method includes using an electronic flow meter device to produce electrical flow meter output signals and performing a responsive control function in a closed loop manner by adjusting at least one dispensing parameter to correct for a difference between an output data set and a reference data set. In another embodiment, a system includes a control operatively coupled to a gas flow meter device and to a weigh scale allowing for a density of an amount of viscous material to be determined. In another embodiment, a method includes using a control coupled to both a gas flow meter device and a weigh scale and performing a responsive control function in a closed loop manner by adjusting at least one dispensing parameter using gas flow meter output signals and weigh scale output signals.

DISPENSER AND METHOD OF DISPENSING AND CONTROLLING WITH A FLOW METER

Systems and methods related to dispensing fluid and controlling a dispensing operation. The system includes a fluid dispenser including an inlet and an outlet, the dispenser being operable to start and stop the flow of the fluid from the outlet onto a substrate. The system also includes a fluid supply reservoir adapted to hold the fluid, and having an outlet coupled in fluid communication with the inlet of the fluid dispenser to establish a flow path for the fluid between the fluid supply reservoir and the outlet of the fluid dispenser. The fluid supply reservoir further includes a pneumatic input coupled to an air flow path adapted to receive pressurized air for forcing the fluid from the outlet of the reservoir. An electronic air flow meter device is operatively coupled to the air flow path to produce electrical output signals. 1. A fluid dispensing system , comprising:a fluid dispenser including an inlet and an outlet, the dispenser being operable to start and stop a flow of fluid from the outlet onto a substrate;a fluid supply reservoir adapted to hold the fluid, and having an outlet coupled in fluid communication with the inlet of the fluid dispenser to establish a flow path for the fluid between the fluid supply reservoir and the outlet of the fluid dispenser, the fluid supply reservoir further including an pneumatic input coupled to an air flow path adapted to receive pressurized air for forcing the fluid from the outlet of the fluid supply reservoir, said fluid supply reservoir being thermally insulated;an electronic air flow meter device operatively coupled to the air flow path to produce electrical output signals; anda control operatively coupled to the electronic air flow meter device, the control receiving and processing the electrical output signals to determine a value associated with the fluid.2. The fluid dispensing system of claim 1 , wherein the electrical output signals produced by the electronic air flow meter device are proportional to a flow ...

FLOW METERING FOR DISPENSE MONITORING AND CONTROL

Methods and systems of accurately dispensing a viscous fluid onto a substrate. In an embodiment, a method includes using an electronic flow meter device to produce electrical flow meter output signals and performing a responsive control function in a closed loop manner by adjusting at least one dispensing parameter to correct for a difference between an output data set and a reference data set. In another embodiment, a system includes a control operatively coupled to a gas flow meter device and to a weigh scale allowing for a density of an amount of viscous material to be determined. In another embodiment, a method includes using a control coupled to both a gas flow meter device and a weigh scale and performing a responsive control function in a closed loop manner by adjusting at least one dispensing parameter using gas flow meter output signals and weigh scale output signals. 1. A method of controlling a non-contact jetting dispensing system to accurately dispense a viscous fluid onto a substrate , the method comprising:directing the viscous fluid from a viscous fluid supply into a non-contact jetting dispenser having an inlet and an outlet;discharging the viscous fluid through the outlet of the non-contact jetting dispenser, the non-contact jetting dispenser being operable to start and stop the flow of the viscous fluid through the outlet onto the substrate;using an electronic flow meter device operatively coupled in a flow path between the viscous fluid supply and the outlet of the non-contact jetting dispenser to produce electrical flow meter output signals proportional to the flow rate of the viscous fluid flowing through the flow path, the electrical flow meter output signals forming an output data set;comparing the output data set to a reference data set stored in a control; andperforming a responsive control function in a closed loop manner by adjusting at least one dispensing parameter to correct for a difference between the output data set and the ...

SYSTEMS AND METHODS FOR TWO-COMPONENT MIXING IN A JETTING DISPENSER

Systems and methods for two-component mixing in a jetting dispenser are provided herein. A jetting dispenser includes a fluid chamber having a first fluid inlet providing a first fluid and a second fluid inlet providing a second fluid, wherein the first fluid and the second fluid mix within the fluid chamber into a mixed fluid. A method for dispensing a mixed fluid from a dispenser having a fluid chamber in fluid communication with first and second fluid inlets is also provided. A first fluid is provided to the fluid chamber via the first fluid inlet and a second fluid is provided to the fluid chamber via the second fluid inlet. At least a portion of a valve element is moved relative to a valve seat to cause dynamic mixing of the first fluid and the second fluid within the fluid chamber to produce the mixed fluid that is dispensed. 1. A jetting dispenser , comprising:a fluid chamber in fluid communication with a first fluid inlet providing a first fluid and a second fluid inlet providing a second fluid, wherein the first fluid and the second fluid mix within the fluid chamber into a mixed fluid;a fluid outlet from the fluid chamber;a valve seat with an opening communicating with the fluid outlet;a poppet disposed within the fluid chamber, the poppet configured with a valve element; anda drive member configured to reciprocally move at least a portion of the poppet and valve element relative to the valve seat to cause a droplet of the mixed fluid to be jetted from the fluid outlet.2. The jetting dispenser of claim 1 , wherein the reciprocal movement of the valve element causes the mixing of the first fluid and the second fluid within the fluid chamber.3. The jetting dispenser of claim 1 , wherein the fluid chamber comprises a side wall and one or more protrusions disposed on the side wall.4. The jetting dispenser of claim 1 , wherein the poppet or a body defining the fluid chamber rotate relative to one another to cause the mixing of the first fluid and the second ...

SYSTEMS AND METHODS FOR DISPENSING MULTI-COMPONENT MATERIALS

Systems and methods for applying a mixed material to a substrate are disclosed herein. The method includes receiving dispensing operating parameters and dispensing first and second materials at first and second material flow rates and determining amounts of the first and second materials dispensed. The method also includes automatically adjusting the dispensing of the first and second materials to adjusted first and second material flow rates based upon the determined amounts of the first and second materials dispensed. The method includes pumping the first and second materials at the adjusted first and second material flow rates, mixing the first material and the second material within a chamber of a mixer to form the mixed material, and dispensing the mixed material from a dispensing nozzle onto the substrate. 1. A method for dispensing a mixed material , which includes at least a first material and a second material , onto a substrate , the method comprising:receiving dispensing operating parameters;dispensing a first material from a first pump at a first material flow rate and determining an amount of the first material dispensed;dispensing a second material from a second pump at a second material flow rate and determining an amount of the second material dispensed;automatically adjusting dispensing of the first material to an adjusted first material flow rate and dispensing of the second material to an adjusted second material flow rate based on the determined amounts of the first and second materials dispensed;pumping the first material from the first pump at the adjusted first material flow rate;pumping the second material from the second pump at the adjusted second material flow rate;mixing the first material and the second material within a chamber of a mixer to form the mixed material; anddispensing the mixed material from a dispensing nozzle onto the substrate.2. The method of claim 1 , wherein:determining the amount of the first material dispensed ...

Systems and methods for inspecting and cleaning a nozzle of a dispenser

Systems and methods for inspecting and cleaning a nozzle of a dispenser are disclosed. The systems may include a platform supporting a cleaning substrate. The cleaning substrate may have a plurality of hook structures configured to remove a material from the nozzle. The systems may also include a camera configured to capture an image of the nozzle and a controller configured to control the system. The methods may include providing a cleaning substrate having a plurality of hook structures, and moving at least one of the nozzle and the cleaning substrate relative to the other to remove a material from the nozzle. The methods may also include capturing an image of the nozzle after dispensing with a camera, processing the image to generate a value, utilizing the value to determine if the nozzle should be cleaned, and if the determination is that the nozzle should be cleaned, cleaning the nozzle.

DISPENSER AND METHOD OF DISPENSING AND CONTROLLING WITH A FLOW METER

Systems and methods related to dispensing fluid and controlling a dispensing operation. The system includes a fluid dispenser including an inlet and an outlet, the dispenser being operable to start and stop the flow of the fluid from the outlet onto a substrate. A fluid supply reservoir adapted to hold the fluid, and having an outlet coupled in fluid communication with the inlet of the fluid dispenser to establish a flow path for the fluid between the fluid supply reservoir and the outlet of the fluid dispenser. The fluid supply reservoir further includes a pneumatic input coupled to an air flow path adapted to receive pressurized air for forcing the fluid from the outlet of the reservoir. An electronic air mass flow meter device is operatively coupled to the air flow path to produce electrical output signals proportional to the mass flow rate of the air flowing through the pneumatic input. Components and methods are provided to accurately determine the volume of the fluid in the reservoir, and to set the stroke length of a valve used in the system. 1. A fluid dispensing system for accurately dispensing fluid and controlling a dispensing operation , the system comprising:a fluid dispenser including an inlet and an outlet, the dispenser being operable to start and stop the flow of the fluid from the outlet onto a substrate;a fluid supply reservoir adapted to hold the fluid, and having an outlet coupled in fluid communication with the inlet of the fluid dispenser to establish a flow path for the fluid between the fluid supply reservoir and the outlet of the fluid dispenser, the fluid supply reservoir further including a pneumatic input coupled to an air flow path adapted to receive pressurized air for forcing the fluid from the outlet of the reservoir;an electronic air mass flow meter device operatively coupled to the air flow path to produce electrical output signals proportional to the mass flow rate of the air flowing through the pneumatic input;a pressure ...

Jetting dispensing system including feed by progressive cavity pump and associated methods

A jetting dispensing system includes a dispenser body with a fluid chamber and a valve element, and a progressive cavity pump for feeding fluid into the fluid chamber. The progressive cavity pump propagates a plurality of separated cavities of fluid along an elongate length thereof to generate and maintain an incoming fluid pressure at a fluid inlet and the fluid chamber of the dispenser body. Accordingly, the droplets that are generated from operating the valve element in jetting dispensing cycles may define a volume of fluid, regardless of variations in fluid viscosity and variations in operational speed of the jetting dispensing system. Furthermore, the velocity profile of fluid exiting the dispenser body may be more constant to avoid causing changes in fluid velocity that can damage fluid particles and/or cause rotational tumbling or blossoming of the droplet while in flight towards the substrate.

SYSTEMS AND METHODS FOR INSPECTING AND CLEANING A NOZZLE OF A DISPENSER

Systems and methods for inspecting and cleaning a nozzle of a dispenser are disclosed. The systems may include a platform supporting a cleaning substrate. The cleaning substrate may have a plurality of hook structures configured to remove a material from the nozzle. The systems may also include a camera configured to capture an image of the nozzle and a controller configured to control the system. The methods may include providing a cleaning substrate having a plurality of hook structures, and moving at least one of the nozzle and the cleaning substrate relative to the other to remove a material from the nozzle. The methods may also include capturing an image of the nozzle after dispensing with a camera, processing the image to generate a value, utilizing the value to determine if the nozzle should be cleaned, and if the determination is that the nozzle should be cleaned, cleaning the nozzle. 1. A system for cleaning a nozzle of a dispenser , the system comprising:a platform; anda cleaning substrate supported by the platform, the cleaning substrate having a plurality of hook structures configured to remove a material from the nozzle.2. The system of claim 1 , wherein the hook structures comprise nylon or polyester.3. The system of claim 1 , further comprising a controller configured to generate one or more signals to move at least one of the nozzle and the cleaning substrate relative to the other to remove the material from the nozzle using the plurality of hook structures.4. The system of claim 3 , wherein the controller is further configured to generate one or more signals to:move the nozzle against a first portion of the cleaning substrate;move the nozzle against a second portion of the cleaning substrate different than the first portion;generate an index based on a number of times the nozzle is moved against the first and second portions of the cleaning substrate; andindicate an end of a lifecycle of the cleaning substrate based on the index being greater than ...

AUTOMATIC PIEZO STROKE ADJUSTMENT

A method of calibrating the jetting profile includes applying voltage to a piezoelectric actuator to move a valve closure structure between non-impact and impact positions, sensing the position of the valve closure structure, establishing a reference point using voltage and position data, and using the reference point to adjust the voltage applied. Another method uses a mechanical stop to calibrate a jetting system. This method includes applying voltage to the piezoelectric actuator to move the valve closure structure between non-impact and impact calibration positions, sensing the position of the valve closure structure, generating voltage and position calibration data, establishing a master reference point using this data, and using the master reference point to determine wear of at least one of: the piezoelectric actuator and the valve closure structure. Another method of operating a jetting system includes the user inputting information into a control component. Another method involves using voltage data and the position data relating to a piezoelectric actuator for preventative maintenance of one or more components of the jetting valve. 1. A method of calibrating the jetting profile of a jetted fluid material for a jetting system , the jetting system including a jetting dispenser and a control component operatively coupled to the jetting dispenser , the jetting dispenser including a valve seat , a valve closure structure , and a piezoelectric actuation mechanism having a piezoelectric actuator , the method comprising:applying voltage to the piezoelectric actuator to move the valve closure structure between a non-impact position where the valve closure structure is not impacting the valve seat and an impact position where at least a portion of the valve closure structure is impacting the valve seat;generating voltage data as the valve closure structure is moved;sensing the position of the valve closure structure as the valve closure structure is moved using a ...

SYSTEMS AND METHODS FOR CALIBRATING FLOW AND FOR COATING A SUBSTRATE

Systems and methods for applying a liquid coating to a substrate are disclosed herein. One exemplary method includes calibrating flow rate of a material through a coating system. A target flow rate for the material through a spray nozzle is received, a first operating pressure of the coating system based upon the target flow rate is calculated, and the material is ejected onto a least part of a surface with the material flowing through the spray nozzle at the first operating pressure of the coating system. If it is determined that a difference between an operating flow rate and the target flow rate is outside of a predetermined control range, the operating pressure is adjusted to a second operating pressure and at least part of the substrate is sprayed with the material flowing through the spray nozzle at the second operating pressure of the coating system. 1. A method of calibrating flow rate of a material through a spray nozzle of a coating system for applying the material to a substrate , the method comprising:receiving a target flow rate for the material through the spray nozzle;calculating a first operating pressure of the coating system based upon the target flow rate for the material through the spray nozzle and a pressure-flow relationship between operating pressure of the coating system and flow rate of the material through the spray nozzle;setting an operating pressure of the coating system to the first operating pressure;ejecting material from the nozzle on at least part of a surface with the material flowing through the spray nozzle at the first operating pressure of the coating system;determining an operating flow rate of the material at the first operating pressure of the coating system;comparing the operating flow rate to the target flow rate;determining, in response to the comparison of the operating flow rate to the target flow rate, that a difference between the operating flow rate and the target flow rate is outside of a predetermined control ...

SYSTEMS AND METHODS FOR CALIBRATING FLOW AND FOR COATING A SUBSTRATE

Systems and methods for applying a liquid coating to a substrate are disclosed herein. One exemplary method includes calibrating flow rate of a material through a coating system. A target flow rate for the material through a spray nozzle is received, a first operating pressure of the coating system based upon the target flow rate is calculated, and the material is ejected onto a least part of a surface with the material flowing through the spray nozzle at the first operating pressure of the coating system. Subsequent to a comparison between an operating flow rate and the target flow rate, the operating pressure is adjusted to a second operating pressure and at least part of the substrate is sprayed with the material flowing through the spray nozzle at the second operating pressure of the coating system. 1. A method of calibrating flow rate of a material through a spray nozzle of a coating system for applying the material to a substrate , the method comprising:receiving a target flow rate for the material through the spray nozzle;calculating a first operating pressure of the coating system based upon the target flow rate for the material through the spray nozzle and a pressure-flow relationship between operating pressure of the coating system and flow rate of the material through the spray nozzle;setting an operating pressure of the coating system to the first operating pressure;ejecting material from the spray nozzle on at least part of a surface with the material flowing through the spray nozzle at the first operating pressure of the coating system;determining an operating flow rate of the material at the first operating pressure of the coating system;comparing the operating flow rate to the target flow rate;adjusting, subsequent to the comparing of the operating flow rate to the target flow rate, the operating pressure of the coating system to a second operating pressure; andspraying at least part of the substrate with the material flowing through the spray nozzle ...

FLOW METERING FOR DISPENSE MONITORING AND CONTROL

Methods and systems of accurately dispensing a viscous fluid onto a substrate. In an embodiment, a method includes using an electronic flow meter device to produce electrical flow meter output signals and performing a responsive control function in a closed loop manner by adjusting at least one dispensing parameter to correct for a difference between an output data set and a reference data set. In another embodiment, a system includes a control operatively coupled to a gas flow meter device and to a weigh scale allowing for a density of an amount of viscous material to be determined. In another embodiment, a method includes using a control coupled to both a gas flow meter device and a weigh scale and performing a responsive control function in a closed loop manner by adjusting at least one dispensing parameter using gas flow meter output signals and weigh scale output signals. 1. A method of controlling a non-contact jetting dispensing system to accurately dispense a viscous fluid onto a substrate , the method comprising:directing the viscous fluid from a viscous fluid supply into a non-contact jetting dispenser having an inlet and an outlet;discharging the viscous fluid through the outlet of the non-contact jetting dispenser, the non-contact jetting dispenser being operable to start and stop flow of the viscous fluid through the outlet onto the substrate;using an electronic flow meter device operatively coupled to the viscous fluid supply or the outlet of the non-contact jetting dispenser to produce electrical flow meter output signals corresponding to the flow rate of the viscous fluid through a flow path between the viscous fluid supply and the outlet of the non-contact jetting dispenser, the electrical flow meter output signals forming an output data set;comparing the output data set to a reference data set stored in a controller; andperforming a responsive control function in a closed loop manner by adjusting at least one dispensing parameter to correct for a ...

SYSTEMS AND METHODS FOR CLOSED LOOP FLUID VELOCITY CONTROL FOR JETTING

Systems and methods for closed loop fluid velocity control for jetting are disclosed. A method includes dispensing a first volume of viscous fluid from a nozzle of a dispensing device according to a first value of an operating parameter that affects the exit velocity of the first volume. A characteristic of the first volume is measured using a sensor. The characteristic of the first volume is then compared to a range of values to determine whether the characteristic of the first volume is outside of the range. The value of the operating parameter is adjusted to a second value in response to determining that the characteristic of the first volume is outside the range. A second volume of viscous fluid is dispensed according to the second value of the operating parameter. The exit velocity of the second volume is different than the first volume. 1. A method of calibrating a dispensing device for dispensing viscous fluid , the dispensing device having a nozzle with a valve and being operated by a controller , the method comprising:opening and closing the valve to dispense a first volume of viscous fluid from the nozzle according to a first value of an operating parameter, wherein the first value of the operating parameter affects the exit velocity of the first volume;measuring, using a sensor, a characteristic of the first volume of viscous fluid dispensed from the nozzle;comparing the characteristic of the first volume to a range to determine whether the characteristic of the first volume is outside of the range;adjusting the first value of the operating parameter to a second value in response to a determination that the characteristic of the first volume is outside of the range; anddispensing a second volume of viscous fluid from the dispensing device according to the second value of the operating parameter, wherein the exit velocity of the second volume of viscous fluid from the nozzle is different from the exit velocity of the first volume of viscous fluid from the ...

Flip chip underfill system and method

A system (30) for dispensing a viscous material onto a substrate (16) which includes a dispensing element (22), a viscous material reservoir (20) and a metering device (25) coupled between the reservoir (20) and the dispensing element (22) for metering a variable amount of a viscous material through the dispensing element (22). The dispensing element (22) and metering device (25) can be moved by a positioner (32) along a predetermined pattern adjacent a surface of a substrate (16). A weigh scale (52) located adjacent the substrate (16) receives a metered amount of the viscous material and produces signals representative of a variable weight of the material dispensed during a predetermined time interval. A controller (40) adjusts a speed of movement of the positioner (32) along the predetermined pattern to cause the dispensing element (22) to dispense a desired amount of material based on a calculated flow rate. Alternatively, the controller (40) adjusts a rate of delivery based on the calculated flow rate.

Flip chip underfill system and method

A system for dispensing a viscous material onto a substrate

A system for dispensing a viscous material onto a substrate which includes a dispensing element, a viscous material reservoir and a metering device coupled between the reservoir and the dispensing element for metering a variable amount of a viscous material through the dispensing element. The dispensing element and metering device can be moved by a positioner along a predetermined pattern adjacent a surface of a substrate. Closed loop temperature control is provided for the dispensing element and the substrate to ensure a substantially constant viscosity and a substantially constant flow rate. A motion controller adjusts a speed of movement and a direction of movement of the positioner along the predetermined pattern to cause the dispensing element to dispense a predetermined amount of the material at a predetermined substantially constant rate upon the actuation of the metering device. A prime and purge station may be provided adjacent the substrate for sucking air bubbles from the dispensing element and metering device.

Viscous material dispensing system and method with feedback control

A system for accurately dispensing controlled amounts of viscous material. The system includes a pressurized supply of the viscous material, a dispenser connected with the pressurized supply and a feedback control for ensuring that a discrete dispensed amount corresponds closely to the desired dispensed amount for a particular application. The different methods of feedback control include changing pressure of the pressurized supply after measuring a dispensed amount and comparing the dispensed amount with a stored value representing the desired amount. Another manner of feedback control includes changing an air operating pressure associated with the dispenser. A third type of feedback control includes adjusting the duration that the dispenser is maintained on to dispense the viscous material. Each of these types of feedback control are preferably used in succession, as necessary, to ensure that the desired amount of viscous material is discharged from the dispenser. Methods of controlling an amount of viscous material discharged from a dispenser further include using one or more of the feedback controls described above.

Flip chip underfill system and method

Systems and methods for closed loop fluid velocity control for jetting

Systems and methods for closed loop fluid velocity control for jetting are disclosed. A method includes dispensing a first volume of viscous fluid from a nozzle of a dispensing device according to a first value of an operating parameter that affects the exit velocity of the first volume. A characteristic of the first volume is measured using a sensor. The characteristic of the first volume is then compared to a range of values to determine whether the characteristic of the first volume is outside of the range. The value of the operating parameter is adjusted to a second value in response to determining that the characteristic of the first volume is outside the range. A second volume of viscous fluid is dispensed according to the second value of the operating parameter. The exit velocity of the second volume is different than the first volume.

DISTRIBUTION DEVICE AND DISTRIBUTION METHOD FOR VISCOUS MATERIAL WITH FEEDBACK REGULATION

Viscous material dispensing system and method with feedback control

A system (10) for accurately dispensing controlled amounts of viscous material. The system includes a pressurized supply (14) of the viscous material, a dispenser (12) connected with the pressurized supply (14) and a feedback control (26) for ensuring that a discrete dispensed amount (20) corresponds closely to the desired dispensed amount for a particular application. The different methods of feedback control include changing pressure of the pressurized supply (14) after measuring a dispensed amount (20) and comparing the dispensed amount (20) with a stored value representing the desired amount. Another manner of feedback control includes changing an air operating pessured associated with the dispenser (12). A third type of feedback control includes adjusting the duration that the dispenser (12) is maintained on to dispense the viscous material (20).

Centrifugally assisted underfill method

A method of underfilling a space between a semiconductor flip chip and a substrate to encapsulate a plurality of electrical connections with a viscous underfill material. The flip chip is mounted to the substrate with a plurality of electrical connections thereby forming a gap between opposed surfaces of the flip chip and substrate. The viscous underfill material is dispensed adjacent at least one edge of the flip chip. The flip chip and substrate are the rotated to move the underfill material into the gap under the influence of centrifugal force. The underfill material is cured after fully encapsulating the electrical connections.

Improved fluid dispensing process control using machine learning and system implementing the same

Systems and methods for improved fluid dispensing process control using a machine learning tool are disclosed. In an example method, successive portions of viscous fluid are dispensed by a dispensing device according to operating parameters to train a machine learning tool to associate defect classifications with images of dispensed portions and/or operating parameters associated with dispensing the dispensed portions. The trained machine learning tool is then used in a closed loop fashion in production to detect and correct for defects associated with the dispensed portions to improve quality and production efficiency.

System for jetting phosphor for optical displays

System for jetting phosphor for optical displays

Methods for calibrating flow and for coating a substrate

Systems and methods for applying a liquid coating to a substrate are disclosed herein. One exemplary method includes calibrating flow rate of a material through a coating system. A target flow rate for the material through a spray nozzle is received, a first operating pressure of the coating system based upon the target flow rate is calculated, and the material is ejected onto a least part of a surface with the material flowing through the spray nozzle at the first operating pressure of the coating system. Subsequent to a comparison between an operating flow rate and the target flow rate, the operating pressure is adjusted to a second operating pressure and at least part of the substrate is sprayed with the material flowing through the spray nozzle at the second operating pressure of the coating system.

Systems and methods for inspecting and cleaning a nozzle of a dispenser

Improved fluid dispensing process control using machine learning and system implementing the same

Systems and methods for improved fluid dispensing process control using a machine learning tool are disclosed. In an example method, successive portions of viscous fluid are dispensed by a dispensing device according to operating parameters to train a machine learning tool to associate defect classifications with images of dispensed portions and/or operating parameters associated with dispensing the dispensed portions. The trained machine learning tool is then used in a closed loop fashion in production to detect and correct for defects associated with the dispensed portions to improve quality and production efficiency.

Improved fluid dispensing process control using machine learning and system implementing the same

Systems and methods for improved fluid dispensing process control using a machine learning tool are disclosed. In an example method, successive portions of viscous fluid are dispensed by a dispensing device according to operating parameters to train a machine learning tool to associate defect classifications with images of dispensed portions and/or operating parameters associated with dispensing the dispensed portions. The trained machine learning tool is then used in a closed loop fashion in production to detect and correct for defects associated with the dispensed portions to improve quality and production efficiency.

Automatic piezo stroke adjustment

A method of calibrating the jetting profile includes applying voltage to a piezoelectric actuator (34) to move a valve closure structure (18) between non-impact and impact positions, sensing the position of the valve closure structure, establishing a reference point using voltage and position data, and using the reference point to adjust the voltage applied. Another method uses a mechanical stop to calibrate a jetting system. This method includes applying voltage to the piezoelectric actuator to move the valve closure structure between non-impact and impact calibration positions, sensing the position of the valve closure structure, generating voltage and position calibration data, establishing a master reference point using this data, and using the master reference point to determine wear of at least one of: the piezoelectric actuator and the valve closure structure. Another method of operating a jetting system includes the user inputting information into a control component. Another method involves using voltage data and the position data relating to a piezoelectric actuator for preventative maintenance of one or more components of the jetting valve.

Dispenser and method of dispensing and controlling with a flow meter

Systems and methods related to dispensing fluid and controlling a dispensing operation. The system includes a fluid dispenser including an inlet and an outlet, the dispenser being operable to start and stop the flow of the fluid from the outlet onto a substrate. A fluid supply reservoir adapted to hold the fluid, and having an outlet coupled in fluid communication with the inlet of the fluid dispenser to establish a flow path for the fluid between the fluid supply reservoir and the outlet of the fluid dispenser. The fluid supply reservoir further includes a pneumatic input coupled to an air flow path adapted to receive pressurized air for forcing the fluid from the outlet of the reservoir. An electronic air mass flow meter device is operatively coupled to the air flow path to produce electrical output signals proportional to the mass flow rate of the air flowing through the pneumatic input. Components and methods are provided to accurately determine the volume of the fluid in the reservoir, and to set the stroke length of a valve used in the system.

Systems and methods for dispensing multi-component materials

Systems and methods for applying a mixed material to a substrate are disclosed herein. The method includes receiving dispensing operating parameters and dispensing first and second materials at first and second material flow rates and determining amounts of the first and second materials dispensed. The method also includes automatically adjusting the dispensing of the first and second materials to adjusted first and second material flow rates based upon the determined amounts of the first and second materials dispensed. The method includes pumping the first and second materials at the adjusted first and second material flow rates, mixing the first material and the second material within a chamber of a mixer to form the mixed material, and dispensing the mixed material from a dispensing nozzle onto the substrate.