Invention Grant
- Patent Title: Variable ball height on ball grid array packages by solder paste transfer
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Application No.: US15083089Application Date: 2016-03-28
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Publication No.: US09842818B2Publication Date: 2017-12-12
- 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: H01L21/44
- IPC: H01L21/44 ; H01L21/48 ; H01L21/50 ; H01L23/00

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
- US20170278816A1 VARIABLE BALL HEIGHT ON BALL GRID ARRAY PACKAGES BY SOLDER PASTE TRANSFER Public/Granted day:2017-09-28
Information query
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