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:
Jul. 02, 2024
Filed:
Oct. 06, 2022
Rohm Co., Ltd., Kyoto, JP;
Satoshi Kageyama, Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
A thermal print head includes a head substrate () having a main surface () on which a convex part () is formed, a resistor layer () that is formed on the main surface () and the convex part (), a wiring layer () that covers the resistor layer () such that the resistor layer () is exposed at a heat generating part () formed at a part of the convex part (), and a protective layer () that is formed on the main surface () of the head substrate () and covers the resistor layer () and the wiring layer (). The resistor layer () has a main resistor layer that contains tantalum, and at least one of a first sub-resistor layer that contains tantalum nitride and is stacked below the tantalum layer and a second sub-resistor layer that contains tantalum nitride and is stacked on the tantalum layer. The nitrogen content of tantalum nitride contained in the first sub-resistor layer and the second sub-resistor layer exceeds a predetermined value such that the tantalum nitride is deposited in a stable structure.