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:
Jun. 17, 1986
Filed:
Mar. 19, 1984
Applicant:
Inventors:
Assignee:
Fujitsu Limited, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ; B47J / ;
U.S. Cl.
CPC ...
219216 ; 219543 ; 346 / ;
Abstract
Cracks in an Ta.sub.2 O.sub.5 anti-abrasion layer of a thermal printing head resulting from the crystallization of the Ta.sub.2 O.sub.5 in the layer, are suppressed by the addition of SiO.sub.2 to the layer. The anti-abrasion layer is provided as a uniform mixture of Ta.sub.2 O.sub.5 and SiO.sub.2 throughout the layer by sputtering a target composed of a mixture containing tantalum and silicon ingredients onto an antioxidation layer. The thermal printing head is also subjected to annealing to stabilize the resistivity of the heating elements.