Invention Grant
- Patent Title: Variable ball height on ball grid array packages by solder paste transfer
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Application No.: US15812754Application Date: 2017-11-14
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Publication No.: US10256205B2Publication Date: 2019-04-09
- Inventor: Eric J. Li , Jimin Yao , Shawna M. Liff
- Applicant: Intel Corporation
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Green, Howard & Mughal LLP.
- Main IPC: H01L23/48
- IPC: H01L23/48 ; H01L23/52 ; H01L29/40 ; H01L23/00 ; H01L23/498 ; H01L21/48

Abstract:
BGA packages with a spatially varied ball height, molds and techniques to form such packages. A template or mold with cavities may be pre-fabricated to hold solder paste material applied to the mold, for example with a solder paste printing process. The depth and/or diameter of the cavities may be predetermined as a function of spatial position within the mold working surface area. Mold cavity dimensions may be specified corresponding to package position to account for one or more pre-existing or expected spatial variations in the package, such as a package-level warpage measurement. Any number of different ball heights may be provided. The molds may be employed in a standardize process that need not be modified with each change in the mold.
Public/Granted literature
- US20180068969A1 VARIABLE BALL HEIGHT ON BALL GRID ARRAY PACKAGES BY SOLDER PASTE TRANSFER Public/Granted day:2018-03-08
Information query
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