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:
Jan. 29, 2008
Filed:
Apr. 27, 2001
Chan Hin Kam, Singapore, SG;
Yee Loy Lam, Singapore, SG;
Yan Zhou, Pleasanton, CA (US);
Shide Cheng, Pleasanton, CA (US);
Woon Siong Gan, Singapore, SG;
Chan Hin Kam, Singapore, SG;
Yee Loy Lam, Singapore, SG;
Yan Zhou, Pleasanton, CA (US);
Shide Cheng, Pleasanton, CA (US);
Woon Siong Gan, Singapore, SG;
Acoustical Technologies Singapore Pte. Ltd., Singapore, SG;
Nanyang Technological University, Singapore, SG;
Abstract
A surface acoustic wave device that can operate in alternate-phase mode and single-phase mode, and thus generate surface acoustic waves at two different frequencies. The device is based on a piezoelectric film deposited on an elastic substrate, and includes an electrode layer patterned as two interdigital electrodes and electrical source (). The device is operated in alternate-phase mode by connecting the two electrodes to different ends of an electrical source (). The device is operated in single-phase mode by connecting the two electrodes to the same end of an electrical source.