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:
Apr. 03, 2001
Filed:
Mar. 04, 1997
Michael J Regan, Corvallis, OR (US);
Brian J Keefe, La Jolla, CA (US);
Ali Emamjomeh, San Diego, CA (US);
Roger J Kolodziej, Corvallis, OR (US);
Ulrich E Hess, Corvallis, OR (US);
John P Whitlock, Lebanon, OR (US);
Domingo A Figueredo, Livermore, CA (US);
Gregory T Hindman, Albany, OR (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A thermal ink jet printhead that includes a thin film substrate including a plurality of thin film layers, a plurality of ink firing heater resistors defined in the plurality of thin film layers, a patterned tantalum carbide layer disposed on the plurality of thin film layers, an ink barrier layer disposed over the tantalum carbide layer, and respective ink chambers formed in the ink barrier layer over respective thin film resistors, each chamber formed by a chamber opening in barrier layer. The tantalum carbide layer forms an oxidation and wear resistance layer and/or a barrier adhesion layer.