Invention Grant
- Patent Title: Metallic solderability preservation coating on metal part of semiconductor package to prevent oxide
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Application No.: US12579574Application Date: 2009-10-15
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Publication No.: US08367476B2Publication Date: 2013-02-05
- Inventor: Woraya Benjavasukul , Thipyaporn Somrubpornpinan , Panikan Charapaka
- Applicant: Woraya Benjavasukul , Thipyaporn Somrubpornpinan , Panikan Charapaka
- Applicant Address: TH Bangna Bangkok
- Assignee: UTAC Thai Limited
- Current Assignee: UTAC Thai Limited
- Current Assignee Address: TH Bangna Bangkok
- Agency: Haverstock & Owens LLP
- Main IPC: H01L21/00
- IPC: H01L21/00 ; H01L21/306

Abstract:
Embodiments of the present invention are directed to metallic solderability preservation coating on connectors of semiconductor package to prevent oxide. Singulated semiconductor packages can have contaminants, such as oxides, on exposed metal areas of the connectors. Oxidation typically occurs on the exposed metal areas when the semiconductor packages are not stored in appropriate environments. Copper oxides prevent the connectors from soldering well. An anti-tarnish solution of the present invention is used to coat the connectors during sawing, after sawing, or both of a semiconductor array to preserve metallic solderability. The anti-tarnish solution is a metallic solution, which advantageously allows the semiconductor packages to not need be assembled immediately after fabrication.
Public/Granted literature
- US20100233854A1 METALLIC SOLDERABILITY PRESERVATION COATING ON METAL PART OF SEMICONDUCTOR PACKAGE TO PREVENT OXIDE Public/Granted day:2010-09-16
Information query
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