manufacture of electronic parts
US6451502B1 · kind B1 · utility
6Cited by
13References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Nov 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/0082
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A precursor for electronic parts, for example printed circuit boards, has a negative-working thermally-imagable layer on a substrate, for example a copper board or semiconductor. The layer comprises a cross-linking agent, a thermally-activated acid generator, and a polymeric substance containing polyvinylphenol units and alkyl acrylate units. Such as layer has improved mechanical properties with maintenance of good imaging properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.