| 发明名称 |
Method of drilling of through-holes in printed circuit board panels. |
| 摘要 |
<p>A method of drilling a through-hole in a printed circuit board panel, which comprises placing a water-soluble lubricant sheet on one surface or each of two surfaces of a printed circuit board panel and drilling a through-hole though the printed circuit board panel, the water-soluble lubricant sheet being composed of a mixture of 20 to 90 % by weight of a polyethylene glycol having a weight average molecular weight of not less than 10,000 with 10 to 80 % by weight of a water-soluble lubricant and having a thickness of 0.05 to 3 mm.</p> |
| 申请公布号 |
EP0470757(B1) |
申请公布日期 |
1995.01.11 |
| 申请号 |
EP19910307032 |
申请日期 |
1991.07.31 |
| 申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
GAKU, MORIO, C/O MITSUBISHI GAS CHEMICAL CO., INC.;KIMBARA, HIDENORI, C/O TOYO WORKS |
| 分类号 |
B23Q11/00;B23B41/00;B23Q11/10;H05K3/00;H05K3/46;(IPC1-7):H05K3/00;B23B35/00;C10M111/04 |
主分类号 |
B23Q11/00 |
| 代理机构 |
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代理人 |
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