Invention Grant
- Patent Title: Ball grid array and land grid array assemblies fabricated using temporary resist
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Application No.: US16371038Application Date: 2019-03-31
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Publication No.: US10679931B2Publication Date: 2020-06-09
- Inventor: Jae-Woong Nah , Charles L. Reynolds , Katsuyuki Sakuma
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Otterstedt, Wallace & Kammer, LLP
- Agent L. Jeffrey Kelly
- Main IPC: H01L23/498
- IPC: H01L23/498 ; H01L21/033 ; H01L23/00 ; H01L23/15 ; H05K3/34 ; H05K3/40

Abstract:
Ball grid assembly (BGA) bumping solder is formed on the back side of a laminate panel within a patterned temporary resist. Processes such as singulation and flip chip module assembly are conducted following BGA bumping with the temporary resist in place. The resist is removed from the back side of the singulated laminate panel prior to card assembly. Stand-off elements having relatively high melting points can be incorporated on the BGA side of the laminate panel to ensure a minimum assembly solder collapse height. Alignment assemblies are formed on the socket-facing side of an LGA module using elements having relatively high melting points and injected solder.
Public/Granted literature
- US20190229045A1 BALL GRID ARRAY AND LAND GRID ARRAY ASSEMBLIES FABRICATED USING TEMPORARY RESIST Public/Granted day:2019-07-25
Information query
IPC分类: