Copper foil having blackened surface or layer

Details Copper foil having blackened surface or layer Copper foil having blackened surface or layer

2008-03-11

2008-03-11

Lavilla, Michael E. (Department: 1794)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C428S220000, C428S332000, C428S336000, C428S340000, C428S607000, C428S675000, C428S678000, C428S680000, C428S687000

Reexamination Certificate

active

07341796

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.

REFERENCES:
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patent: 6638642 (2003-10-01), Kitano et al.
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patent: 2004/0170857 (2004-09-01), Yoshihara et al.
patent: 2002-341783 (2002-11-01), None
Esp@cenet database, one page English Abstract of JP 2003-201597, Jul. 2003.
Esp@cenet database, one page English Abstract of JP 2003-218583, Jul. 2003.
Esp@cenet database, one page English Abstract of JP 2002-009484, Jan. 2002.
Esp@cenet database, one page English Abstract of JP 2001-147312, May 2001.
Esp@cenet database, one page English Abstract of JP 2001-217589, Aug. 2001.

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