17-08-2017 дата публикации
Номер: US20170236797A1
Принадлежит:
A package includes a first package component, a second package component over the first package component, and a solder region bonding the first package component to the second package component. At least one ball-height control stud separates the first package component and the second package component from each other, and defines a standoff distance between the first package component and the second package component. 1. A method comprising:aligning a first package component to a second package component, wherein a solder region in the first package component is aligned to, and is in contact with, a surface conductive feature in the second package component; andreflowing the solder region to bond the first package component to the second package component, wherein during the reflow, a ball-height control stud is located between, and is in contact with, the first package component and the second package component to define a standoff distance between the first package component and the second package component.2. The method of further comprising forming the ball-height control stud and a surface dielectric layer of the second package component in a common process claim 1 , wherein the ball-height control stud and the surface dielectric layer are formed of a same dielectric material claim 1 , and no distinguishable interface is between the ball-height control stud and the surface dielectric layer.3. The method of claim 2 , wherein the ball-height control stud forms a step with a top surface and an edge of the surface dielectric layer.4. The method of claim 2 , wherein the common process comprises stencil stamping.5. The method of claim 1 , wherein the ball-height control stud is pre-formed as an integrated part of the second package component before the aligning.6. The method of further comprising claim 1 , before the aligning claim 1 , adhering the ball-height control stud to the second package component.7. The method of claim 1 , wherein the first package ...
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