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. 16, 2024
Filed:
May. 18, 2021
Taiyo Yuden Co., Ltd., Tokyo, JP;
TAIYO YUDEN CO., LTD., Tokyo, JP;
Abstract
An acoustic wave device including a support substrate, a piezoelectric layer provided over the support substrate, at least one pair of comb-shaped electrodes disposed on the piezoelectric layer, each of the at least one pair of comb-shaped electrodes including electrode fingers, a temperature compensation film interposed between the support substrate and the piezoelectric layer, the temperature compensation film having a temperature coefficient of elastic constant opposite in sign to a temperature coefficient of elastic constant of the piezoelectric layer; and an insulating layer interposed between the support substrate and the temperature compensation film, a first surface of the insulating layer having first protruding portions and/or first recessed portions, a second surface of the insulating layer having second protruding portions and/or second recessed portions, the first surface being closer to the support substrate, the second surface being closer to the temperature compensation film.