Invention Grant
- Patent Title: Method of underfill air vent for flipchip BGA
- Patent Title (中): 用于倒装芯片BGA的底部填充气孔的方法
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Application No.: US12046772Application Date: 2008-03-12
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Publication No.: US07791209B2Publication Date: 2010-09-07
- Inventor: Takashi Hisada , Sayaka Nishi
- Applicant: Takashi Hisada , Sayaka Nishi
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: The Law Firm of Andrea Hence Evans, LLC
- Main IPC: H01L23/48
- IPC: H01L23/48

Abstract:
This invention relates to ejecting an underfill resin at multiple semiconductor die edges such that vacuum suction provided at a laminate through hole located beneath a stage enables spread of underfill resin from each edge simultaneously for quicker spread and reduction of voids. The excess underfill resin intentionally suctioned through the through hole air vent on the underside of the laminate is attracted to re-usable tape. The attracted underfill resin is cleaned from a rotating head mechanism by a cleaning pad positioned beneath a lower surface of the head.
Public/Granted literature
- US20090230566A1 Method of underfill air vent for flipchip BGA Public/Granted day:2009-09-17
Information query
IPC分类: