| 发明名称 |
Method of making printed circuit board |
| 摘要 |
A blind hole extending from upper or surface wiring of a printed circuit board to inner or lower wiring, and having an opening larger than the bottom, is formed on a substrate, and a conductor pattern is formed on the bottom and the internal wall of the blind hole to connect the inner wiring with the surface wiring.
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| 申请公布号 |
US5537740(A) |
申请公布日期 |
1996.07.23 |
| 申请号 |
US19950561533 |
申请日期 |
1995.11.22 |
| 申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
SHIRAI, MASAHARU;TSUCHITA, SHUHEI |
| 分类号 |
H05K3/46;H05K1/11;H05K3/00;H05K3/06;H05K3/40;H05K3/42;(IPC1-7):H05K3/10 |
主分类号 |
H05K3/46 |
| 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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