The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 1990
Filed:
Aug. 18, 1987
Larissa Domnikov, Los Angeles, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
Conductive, adherent, non-magnetic deposits are formed on quartz glass by first applying a thin gold layer to the glass, and then depositing silver over the gold. The gold is deposited directly onto a very clean quartz glass substrate from an organo-metallic compound, and then fired to produce a metallic gold layer no more than about 5 microinches thick. A silver layer is deposited over the gold by first laying down a thin strike layer at high voltage, and then electrodepositing a further silver layer under a controlled current density. During the deposition of the final silver layer, the current is preferably applied in a periodic reverse current-pulse manner. Prior to depositing the gold layer, the quartz glass may be cleaned by wiping with acetone and baking in a vacuum to remove further contamination.