发明授权
- 专利标题： Tool for drilling/routing of printed circuit board materials
- 专利标题（中）： 印刷电路板材料的钻孔/布线工具
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申请号： US09486586申请日： 2000-05-15
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公开(公告)号： US06521172B2公开(公告)日： 2003-02-18
- 发明人: Alistair Grearson , John Aucote
- 申请人： Alistair Grearson , John Aucote
- 优先权： SE9703204 19970905
- 主分类号： C22C3200
- IPC分类号： C22C3200
摘要：
A dense cemented carbide product is described. The product is manufactured from WC with a grain size between 0.1 and 0.4 ¼ m, fine grain size cobalt and ruthenium powders. The product is used in PCB machining operations where the addition of 10-25% Ru to the binder phase offers up to 25% wear resistant incrases and up to 100% increase in chipping resistance in PCB routing compared to conventional materials (6% cobalt and 0.4 ¼ m grain size).