发明名称 |
PRINTED CIRCUIT BOARD PUNCHING DRILL |
摘要 |
PROBLEM TO BE SOLVED: To provide a printed circuit board punching drill for improving fusion resistance for a drill and improving hole position precision by imparting compressed residual stress to the drill. SOLUTION: This printed circuit board punching drill is constituted by coating a coating layer imparting compressed residual stress to a part or all of the surfaces of at least a cutting edge.
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申请公布号 |
JP2001322017(A) |
申请公布日期 |
2001.11.20 |
申请号 |
JP20000147329 |
申请日期 |
2000.05.19 |
申请人 |
HITACHI TOOL ENGINEERING LTD |
发明人 |
IYORI YUSUKE |
分类号 |
B23B51/00;(IPC1-7):B23B51/00 |
主分类号 |
B23B51/00 |
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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