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US Patent 7160628 Opaque chrome coating having increased resistance to pinhole formation

Patent 7160628 was granted and assigned to Corning Incorporated on January, 2007 by the United States Patent and Trademark Office.

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Patent abstract

A substrate with a patterned opaque coating formable into an opaque aperture in one process is provided. The opaque coating includes at least a bottom layer and a top layer. The bottom and top layers each include a material selected from the group consisting of chrome and chrome oxide. The top layer has a compressive stress, which makes the opaque coating more resistant to pinhole formation during downstream processing.

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