Copper foil having blackened surface or layer
US7341796B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2005 |
| Grant date | Mar 11, 2008 |
| Priority date | — |
| Expiry date | Jan 26, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/27
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A copper foil with a blackened surface or layer wherein one or both surfaces of a copper foil is subject to black treatment, and having a color difference ΔL*≦−70 and chroma C*≦15 of a black-treated surface when measured by a color difference meter represented by black; ΔL*=−100, white; ΔL*=0. The copper foil with a blackened surface or layer is especially useful for a plasma display panel (PDP) and has superior shielding characteristics of effectively shielding electromagnetic waves, near infrared rays, stray light, outside light and the like, has sufficient contrast, has a deep blackened color, is able to limit the reflected light of incoming light from the outside and reflected light of outgoing light from a plasma display panel, and has superior etching characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.