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:
Jun. 08, 1982
Filed:
Aug. 15, 1980
Yukio Ito, Kokubunji, JP;
Kazuyuki Nagatsuma, Hachioji, JP;
Sigeru Jyomura, Hachioji, JP;
Sakichi Ashida, Fuchu, JP;
Hiroshi Takeuchi, Matsudo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A piezoelectric single crystal which has a composition represented by a general formula (Ba.sub.2-x Sr.sub.x)TiSi.sub.2 O.sub.8, the value x lying within a range of 0.25.ltoreq.x.ltoreq.1.2; and a surface acoustic wave element which is so constructed as to employ surface waves that propagate on a cut plane perpendicular to the Z-axis of the single crystal, or surface waves that propagate in a specified direction on a cut plane containing the X-axis of the single crystal. The piezoelectric single crystal and the surface acoustic wave element employing it have the merits that the electromechanical coupling factor of the surface acoustic waves is great and that the temperature coefficient of delay time of the surface acoustic waves is small.