Treated copper foil and process for making treated copper foil
US6132589A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Sep 10, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/0723
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention relates to a treated copper foil, comprising: a copper foil with a layer of zinc oxide adhered to the base surface of at least on side of said copper foil, said layer of zinc oxide having a thickness of about 3 .ANG. to about 80 .ANG.; and a layer of a trivalent chromium oxide adhered to said layer of zinc oxide. In one embodiment, the foil has a layer of a silane coupling agent adhered to the layer of trivalent chromium oxide. The invention also relates to a process for applying the layer of zinc oxide and the layer of trivalent chromium oxide to the copper foil. The invention also relates to laminates comprising a dielectric substrate and the foregoing copper foil adhered to the substrate. In one embodiment, the dielectric substrate is comprised of an epoxy resin made with a curing agent that is other than an amine curing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.