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:
Feb. 26, 2002
Filed:
May. 30, 2000
Hideki Kamada, Tokyo, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
Each of heating elements comprises a heating resistor, and a pair of a common electrode and an individual electrode formed on ends of said heating resistor so that a heating area of the heating resistor is exposed. A barrier layer covers the electrodes so that the electrodes are not exposed to the ink in the ink flow passage, that is, not only upper surface of the electrodes, but also edges thereof are covered with the barrier layer. The barrier layer is made of, for example, single atomic metal such as Ta and Ti, oxide, corrosion resistant amorphous alloy, titanium nitride, titanium-tungsten, or the like. The barrier layer has the thickness of 10 to 1,000 nm, and is made by electroless plating or the like. The barrier layer is effective in preventing not only corrosion but also migration as contact surface corrosion.