An amendment process for chemical surface of silicon minisize electret acoustic sensor electricity storage membrane

The invention is a chemical surface decoration process for silicon micro type electret voice sensor electricity storing film. It uses glass container with air extracting valve, its bottom is arranged with solution HMDS or DCDMS, the top is arranged with pile film Si plate containing SiO2 or Si3N4/SiO2, under the pure saturate steam of the solution, carries on air phase reaction, avoids the film from being contaminated by water or other active substance, the invention can improve electret state of SiO2, Si3O4/SiO2, guarantees the stability of charge storage.

Method for producing controllable microhole structural piezoelectric functional film

Method for preparing piezoelectric polymer functional film with ordered micro-cellular structure by using template

The invention discloses a method for preparing a piezoelectric polymer functional film with an ordered micro-cellular structure by using a template, and relates to a preparation technique of the piezoelectric polymer functional film with the ordered micro-cellular structure. The method firstly prepares a template (4) with a concave-convex ordered pattern, then prepares an ordered porous polymer single-layer thin film (2) which shows a pattern corresponding to the concave-convex ordered pattern of the template (4), then clamps the ordered porous polymer single-layer thin film (2) between two dense films, and carries out hot-pressing to form the piezoelectric polymer functional film with the ordered micropore structure. The method has simple technique, not only can obtain an electromechanical functional film with high thermostability and high pressure flexibility, and has more outstanding advantages of the capability of precisely controlling the microstructure of the film and electric charge ...

Method for connecting two-piece silicon minisize microphone using organic adhesive

The invention is a method for using organic glue to connect two plate type silicon mikes. It selects solid organic glue with low polymerization degree and low association rate and proper temperature melting area, and it uses vacuum heat evaporating technology to deposit glue on the contact area of the back electrode plate and film oscillating plate, then connects the two plates in controlled temperature with two-plate covering process. The invention integrates the pasting process and the electret process, and it does not affect the sensitivity and frequency response character of the device.

Method for preparing high-active piezoelectric functional membranes by microwave irradiation

The invention discloses a method for preparing high-active piezoelectric functional membranes by microwave irradiation, and relates to a method for preparing high-active piezoelectric functional membranes. The method of the invention comprises the following steps of: soaking polypropylene porous membranes, or COC, PET, FEP, PEN and the like which are available in the market and serve as original membranes into methylenechloride solvent, trichloromethane solvent, acetone solvent, butanone solvent, ethanol solvent and the like which have no response to microwaves for 20 to 30 hours; then takingout from the solvent and irradiating under the microwaves, wherein the irradiation energy is 1.9*10-25-1.99*10-22J, and the irradiation time is 50 to 100 seconds; heating the solvent soaked in membrane pores by using the microwaves to rise the temperature of the solvent and then gasify the solvent in the pores under the action of thermalization so as to achieve the effect of puffing the pores; finally ...

One-chip silicon-base miniature capacitor microphone and manufacturing method thereof

This invention relates to a new structure single chip silicon-base micro-condenser microphone in which, the vibration film is processed by high elastic mono-crystal silicon film, the back pole plate is made up of PI thick films, the diaphragm electrode and the back electrode are led out by concentrated boron buried electrode, only a metal layer with the thickness greater than 1 mum is processed on the hot-pressed feet, micro-acoustic holes are set on the back pole plate, a JFET source follower is integrated on the front of a mono-crystal silicon substrate forming vibration films to reach the aim of impedance transformation. The mono-crystal silicon film is released by HF vapor phase corroding technology, no adhesion occurs between the vibration film and the back pole plate to increase therate of product greatly.

Vehicle-mounted multi-screen simultaneous display method based on USB wired screen projection

The invention discloses a vehicle-mounted multi-screen simultaneous display method based on USB wired screen projection, and the method comprises the steps: a vehicle machine detects the insertion of multimedia equipment, and reads the information source data of the multimedia equipment through a USB collection card, and the information source data are audio and video signals; the vehicle machine receives an audio data stream and a video data stream obtained after the USB acquisition card processes the information source data; the vehicle machine reads the audio data stream and plays the audio data stream; the vehicle machine reads the video data stream and plays the video data stream through the video stream pushing service, the video stream pushing service renders the obtained video data stream, rendering layouts displayed by a plurality of screens are respectively added according to the number of mounted screens, and different rendering layouts are respectively added to different screens ...

Method for preparing porous polymer piezo-electric electret thin film

Method for connecting two-piece silicon minisize microphone using organic adhesive

The invention is a method for using organic glue to connect two plate type silicon mikes. It selects solid organic glue with low polymerization degree and low association rate and proper temperature melting area, and it uses vacuum heat evaporating technology to deposit glue on the contact area of the back electrode plate and film oscillating plate, then connects the two plates in controlled temperature with two-plate covering process. The invention integrates the pasting process and the electret process, and it does not affect the sensitivity and frequency response character of the device.

聚四氟乙烯驻极体多孔过滤膜的制备方法

The invention relates to a teflon electret multihole filter membrane preparing method, adopting corona or electron beam charging to change permeability of teflon filter membrane, and adjusting voltage (namely needle membrane electric field), charge time, electrifying time and needle membrane distance to change permeability of the filter membrane, so as to realize the filter membrane with different cell sizes and apertures, applied to medium liquid with different grain sized pollutants. It can very effectively purify polluted medium liquids such as gasoline, transformer oil and silicon oil.

An amendment process for chemical surface of silicon minisize electret acoustic sensor electricity storage membrane

The invention is a chemical surface decoration process for silicon micro type electret voice sensor electricity storing film. It uses glass container with air extracting valve, its bottom is arrangedwith solution HMDS or DCDMS, the top is arranged with pile film Si plate containing SiO2 or Si3N4/SiO2, under the pure saturate steam of the solution, carries on air phase reaction, avoids the film from being contaminated by water or other active substance, the invention can improve electret state of SiO2, Si3O4/SiO2, guarantees the stability of charge storage.

Method for preparing high-active piezoelectric functional membranes by microwave irradiation

The invention discloses a method for preparing high-active piezoelectric functional membranes by microwave irradiation, and relates to a method for preparing high-active piezoelectric functional membranes. The method of the invention comprises the following steps of: soaking polypropylene porous membranes, or COC, PET, FEP, PEN and the like which are available in the market and serve as original membranes into methylenechloride solvent, trichloromethane solvent, acetone solvent, butanone solvent, ethanol solvent and the like which have no response to microwaves for 20 to 30 hours; then taking out from the solvent and irradiating under the microwaves, wherein the irradiation energy is 1.9*10-25-1.99*10-22J, and the irradiation time is 50 to 100 seconds; heating the solvent soaked in membrane pores by using the microwaves to rise the temperature of the solvent and then gasify the solvent in the pores under the action of thermalization so as to achieve the effect of puffing the pores; finally ...

Method for preparing piezoelectric polymer functional film with ordered micro-cellular structure by using template

The invention discloses a method for preparing a piezoelectric polymer functional film with an ordered micro-cellular structure by using a template, and relates to a preparation technique of the piezoelectric polymer functional film with the ordered micro-cellular structure. The method firstly prepares a template (4) with a concave-convex ordered pattern, then prepares an ordered porous polymer single-layer thin film (2) which shows a pattern corresponding to the concave-convex ordered pattern of the template (4), then clamps the ordered porous polymer single-layer thin film (2) between two dense films, and carries out hot-pressing to form the piezoelectric polymer functional film with the ordered micropore structure. The method has simple technique, not only can obtain an electromechanical functional film with high thermostability and high pressure flexibility, and has more outstanding advantages of the capability of precisely controlling the microstructure of the film and electric charge ...