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. 23, 2024
Filed:
Mar. 05, 2020
Rohm Co., Ltd., Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
An inkjet printing headincludes a pressure chamber, a movable film formation layerthat includes a movable filmA defining a top surface portion of the pressure chamber, and a piezoelectric elementthat is formed to contact a surface of the movable filmA at an opposite side from the pressure chamberand having a peripheral edge receded further toward an interior of the pressure chamberthan the movable filmA in plan view. The piezoelectric elementincludes a lower electrodeformed on a surface of the movable film formation layerat the opposite side from the pressure chamber, an upper electrodedisposed at an opposite side from the movable film formation layerwith respect to the lower electrode, and a piezoelectric filmprovided between the upper electrodeand the lower electrode, and the upper electrodehas a thin portionat least at a portion of a peripheral edge portion.