发明名称 |
Method and system for multi-layer printed circuit board pre-drill processing |
摘要 |
A method and apparatus for optimizing the drilling position of a multi-layer printed circuit board prior to drilling. A template having precisely located target holes and fixture reference marks provides initial coordinate reference information for multi-layer printed circuit boards to be inspected by x radiation. Each board is processed by insertion into a holding fixture, examination of four quadrant target areas using x-ray sources and detectors, digitization of the target area images in each quadrant, and computaton of the optimum board position in a follow-on drilling apparatus. After optimization, three reference holes are punched along one edge of the board to provide accurate fiducial positioning marks when the board is placed in the drilling apparatus.
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申请公布号 |
US4790694(A) |
申请公布日期 |
1988.12.13 |
申请号 |
US19860916779 |
申请日期 |
1986.10.09 |
申请人 |
LOMA PARK ASSOCIATES |
发明人 |
WILENT, JOHN W.;BENSON, ROBERT F.;SPARKS, ROBERT A. |
分类号 |
B23B49/00;H05K3/00;H05K3/46;(IPC1-7):B23C3/00 |
主分类号 |
B23B49/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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