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. 19, 2024
Filed:
Nov. 29, 2019
Rf360 Singapore Pte. Ltd., Singapore, SG;
RF360 Singapore Pte. Ltd., Republic Plaza, SG;
Abstract
A thin film SAW device comprises a carrier substrate (CA), a TCF compensating layer (CL), a piezoelectric layer (PL), and an IDT electrode (EL) on top of the piezoelectric layer. A functional layer (FL) is arranged between piezoelectric layer and TCF compensating layer to further reduce the TCF. The material properties of the functional layer match those of the piezoelectric layer in view of acoustic velocity, density and stiffness such that they do not deviate from each other by more than 10% without having piezoelectric effect. The functional layer my be of the same crystalline constitution as the useful piezoelectric layer but without piezoelectric properties.