Composite article comprising a copper element and a process for producing it
US4970107A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1989 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Jul 21, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To make a composite article comprising a copper element and an adhesive material adhesively bonded to a surface thereof, the surface of the copper element is provided with knife-shaped elongate projections whose opposite flanks are at an average angle of less than 60.degree. to each other. The knife-shaped elongate projections may include rod-shaped projections much smaller than the knife-shaped projections projecting outwardly from the surface of the knife-shaped projections. The knife-shaped projections may be formed by electroless plating and the rod-shaped projections by oxidation and optionally reduction. Bonding strength is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.