发明名称 |
Apparatus for checking patterns on printed circuit boards |
摘要 |
In an apparatus for checking patterns on printed circuit boards by comparing two patterns formed on two printed circuit boards, registration patterns each including orthogonal straight line segments and respectively formed on the two printed circuit boards are imaged by two imagers, and registration images from the imagers are matched by means of a registration unit to accurately match an image of a pattern to be checked on one printed circuit board with an image of a reference pattern on the other printed circuit board.
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申请公布号 |
US4680627(A) |
申请公布日期 |
1987.07.14 |
申请号 |
US19860838713 |
申请日期 |
1986.03.12 |
申请人 |
HITACHI, LTD. |
发明人 |
SASE, AKIRA;NAGATA, TAKEO;FUKUNAGA, MASAO;SAKURAI, YUTAKA;SATOMI, DECEASED, YOSHIKATSU |
分类号 |
H05K3/00;G01B11/24;G01N21/93;G01N21/956;G06K9/64;G06T3/00;H05K1/02;(IPC1-7):G01B11/24 |
主分类号 |
H05K3/00 |
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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