Tool for drilling/routing of printed circuit board materials
US6521172B2 · kind B2 · utility
5Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 2000 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Jul 7, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C29/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.