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:
Mar. 17, 2026
Filed:
Jun. 23, 2023
Riso Technologies Corporation, Tokyo, JP;
Masashi Shimosato, Mishima Shizuoka, JP;
RISO Technologies Corporation, Tokyo, JP;
Abstract
According to one embodiment, a liquid ejection head, includes a piezoelectric member having grooves extending lengthwise in a first direction. The grooves separate the piezoelectric member into piezoelectric elements spaced from each other in a second direction. A connection portion of the piezoelectric member is under a portion of the grooves in a third direction and connects the piezoelectric elements to each other. Individual electrodes are on a first surface of the piezoelectric member on a first side. A common electrode is on a second surface of the piezoelectric member on a second side. Each groove has a depth on the first side that is deeper than a depth in an end portion on the second side. The depth of each groove in the end portion on the first side reaches through the piezoelectric member to a substrate.