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. 28, 2003
Filed:
Jan. 14, 2002
Ayako Yoshida, Tsurugashima, JP;
Atsushi Onoe, Tsurugashima, JP;
Kiyofumi Chikuma, Tsurugashima, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
A surface acoustic wave device includes a crystalline substrate with a structure selected from the group consisting of the perovskite structure, the spinel structure, and the rock salt structure. The device also includes a thin piezoelectric crystalline film having the perovskite structure and deposited on the crystalline substrate by chemical vapor deposition, and an electrode means for generating a surface acoustic wave on the thin piezoelectric crystalline film. In the device, a surface of the crystalline substrate on which the thin piezoelectric crystalline film is deposited is a mirror surface inclined at an offset angle &thgr; from the (001) plane of the crystalline substrate, and the electrode means have electrode fingers arranged in parallel to each other so that a surface acoustic wave propagates along one direction of crystalline axes of the thin piezoelectric crystalline film.