发明授权
- 专利标题: Lead frame and lead frame material
- 专利标题(中): 引线框架和引线框架材料
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申请号: US518529申请日: 1995-08-23
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公开(公告)号: US5530283A公开(公告)日: 1996-06-25
- 发明人: Tadahiro Ohmi , Nobukazu Ikeda , Michio Yamaji , Tsutomu Shinohara , Akihiro Morimoto , Yasuyuki Shirai
- 申请人: Tadahiro Ohmi , Nobukazu Ikeda , Michio Yamaji , Tsutomu Shinohara , Akihiro Morimoto , Yasuyuki Shirai
- 申请人地址: JPX Miyagi-Ken JPX Osaku-Fu
- 专利权人: Tadahiro Ohmi,Fujikin Inc.
- 当前专利权人: Tadahiro Ohmi,Fujikin Inc.
- 当前专利权人地址: JPX Miyagi-Ken JPX Osaku-Fu
- 优先权: JPX6-204038 19940829
- 主分类号: H01L23/50
- IPC分类号: H01L23/50 ; H01L23/495
摘要:
An object of the present invention is to provide a lead frame and a material for lead frame which insure excellent bonding and enables substantial reduction of time for production because such processes as plating are not required and furthermore are excellent in abration resistance.The present invention is characterized in that a silver layer having a construction where amplitude of a refracted ray refracted on the (200) surface is 1/3 or more of the amplitude of refracted X ray refracted on the (111) surface comprises an outer lead section of the base material for the lead frame. The base material is preferably copper, copper-alloy, iron, or iron alloy. The silver layer is formed, for instance, by means of silver plating, and the thickness is preferably in a range from 8 m to 30 m. An intermediate layer may be provided between a surface of the base material and the silver layer.
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