发明公开
- 专利标题: A backup sheet for backing a worksheet during a small bore drilling process
- 专利标题(中): 在小钻孔过程中备份工作台的备份表
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申请号: EP87300289.3申请日: 1987-01-14
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公开(公告)号: EP0238161A3公开(公告)日: 1989-08-30
- 发明人: Eidal, Russell Clair
- 申请人: CONTROL DATA CORPORATION
- 申请人地址: 8100-34th Avenue South Minneapolis Minnesota 55440 US
- 专利权人: CONTROL DATA CORPORATION
- 当前专利权人: CONTROL DATA CORPORATION
- 当前专利权人地址: 8100-34th Avenue South Minneapolis Minnesota 55440 US
- 代理机构: Caro, William Egerton
- 优先权: US829638 19860214
- 主分类号: H05K13/00
- IPC分类号: H05K13/00 ; H05K3/00
摘要:
A backup sheet for backing a worksheet during a small bore drilling process comprises a layer (20,22) of polyimide, fluorocarbon or high temperature polycarbonate material on at least one side of a core (10,12,14,16,18).
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