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:
Nov. 07, 2000
Filed:
Nov. 06, 1998
Charles Spencer Whitman, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A thermal ink jet printhead has a protective layer of Ta with an optimum thickness of about 9,000 A deposited on a protective layer of SiC under deposition conditions determined by a regression equation. The protective layer of SiC has an optimum thickness of about 5,000 A. The life of a thermal ink jet printhead having these two optimum thicknesses is at least twenty times the life of a thermal ink jet printhead not having these two optimum thicknesses in at least one embodiment. Etching of the layer of SiC prior to depositing the layer of Ta further increases the life of a thermal ink jet printhead.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile