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:
May. 09, 2006
Filed:
Sep. 29, 2003
Shigeo Kanna, Suwa, JP;
Shigeo Kanna, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
The invention miniaturizes a surface acoustic wave device on which a plurality of surface acoustic wave elements are disposed and connected together in parallel on a plate, and provides a good temperature characteristic in a wide temperature range. A surface acoustic wave device according to the invention includes a plurality of surface acoustic wave elements disposed on a main surface of a quartz plate cut out with a Euler angle at (0°, 113° to 135°, +/−(40 to 49)°). Surface acoustic waves have propagation directions 'ψ' which are different each other. When the Euler angle is set at (0°, θ, ψ), it is possible to reduce differences in each propagation direction by setting each propagation angle so as to satisfy a formula: ψ=0.3295θ+3.3318°+/−1.125°. This makes it possible to decrease the angle among the surface acoustic wave elements, and thereby miniaturizes the surface acoustic wave elements.