Entry sheet for drilling and method for drilling hole
US6866450B2 · kind B2 · utility
7Cited by
10References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2002 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Apr 10, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/561
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An entry sheet for drilling for a printed wiring board material, which comprises a water-soluble resin (A) and a water-insoluble lubricant (B) as essential components,
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.