Process for coating at least one surface of a polyimide sheet with copper
US4832799A · kind A · utility
25Cited by
20References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1987 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Jul 30, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S205/926
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
At least one surface of a polyimide sheet surface is coated with copper in the absence of an adhesive. The polyimide surface is treated with a one phase aqueous solution comprising an alkylene diamine; an alkali metal hydroxide and a water miscible alcohol to render the surface uniformly and substantially completely textured. The treated surface then is treated with a catalyst, coated with cobalt or nickel and then coated with copper. The laminate produced passes the IPC tests for peel strength and solder float.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.