发明授权
- 专利标题: Method for printed circuit board repair
- 专利标题(中): 印刷电路板修理方法
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申请号: US637947申请日: 1996-04-25
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公开(公告)号: US5809641A公开(公告)日: 1998-09-22
- 发明人: Alan Harris Crudo , John Gillette Davis , Christian Robert Le Coz , Mark Vincent Pierson , Amit Kumar Sarkhel , Ajit Kumar Trivedi
- 申请人: Alan Harris Crudo , John Gillette Davis , Christian Robert Le Coz , Mark Vincent Pierson , Amit Kumar Sarkhel , Ajit Kumar Trivedi
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 主分类号: H01L23/12
- IPC分类号: H01L23/12 ; H05K3/00 ; H05K3/22 ; H05K3/34 ; H05K3/42 ; H05K3/46
摘要:
A method and apparatus for efficiently repairing or reworking a printed circuit board having a solder ball grid array thereon efficiently and at minimum cost includes the steps of drilling out a plated-through hole to sever electrical connections between a ball grid array pad on one surface of the printed circuit board and internal circuits and circuits on an opposite surface of the printed circuit board; inserting a pin having an insulated sleeve surrounding a portion thereof into the drilled-out hole, the pin having attached to one end a wire for attachment to the ball grid array on one surface of the printed circuit board and a post at the other end of the pin for attachment of a wire to the post; the pin having a stop along its length to control vertical positioning of the pin in the drilled-out hole, the pin referred to as a via replacement (VR) pin. Alternately, after the plated through hole is drilled out, an insulated wire may be inserted into the hole with insulation removed from the length of the wire which extends beyond one surface of the printed circuit board. The bare length of wire is bent parallel to the surface of the printed circuit board and attached thereto by a solder reflow process. In a dog bone configuration, the wire is formed around a pad on the surface of the printed circuit board which receives the solder ball.
公开/授权文献
- US4523930A Method of manufacturing composite grinding wheel 公开/授权日:1985-06-18
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