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. 12, 1994
Filed:
Mar. 11, 1993
Takahiro Sato, Toda, JP;
Hidenori Abe, Toda, JP;
Nikko Kyodo Co. Ltd., Tokyo, JP;
Abstract
A surface acoustic wave device comprises lithium tetraborate single crystal substrate to make use of surface acoustic waves with higher propagation velocities and smaller propagation losses, whereby frequencies to be signal-processed can be as high as above 1 GHz. The surface acoustic wave device comprises a metal film formed on a surface of a lithium tetraborate single crystal substrate, the metal film being for exciting, receiving, reflecting and/or propagating surface acoustic waves, the metal film being so formed that a cut angle of the substrate, and a propagation direction of the surface acoustic waves are in an Eulerian angle representation of (39.degree.-51.degree., 66.degree.-114.degree., -20.degree.-20.degree.) and directions equivalent thereto. In this propagation direction few Rayleigh waves exit, and only surface acoustic waves of high propagation velocity are generated. Propagation losses can be eliminated.