Flexible circuit with coverplate layer and overlapping protective layer
US6320137A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2000 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Apr 11, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/099
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A printed circuit including a dielectric substrate and a conductive trace attached to a surface of the dielectric substrate. The trace includes a base layer and a coverplate layer on a portion of the base layer. The coverplate layer defines a coverplate edge on the base layer. A protective layer is formed on a portion of the coverplate layer. The protective layer extends beyond the coverplate edge onto at least a portion of the base layer of the trace. A key aspect of the present invention is that the protective layer overlaps the coverplate edge of each trace to reduce the potential for corrosion of the base layer at the coverplate edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.