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. 02, 2006
Filed:
Dec. 13, 2001
Applicants:
Yoshio Maeda, Nagano-Ken, JP;
Shouichi Komatsu, Nagano-ken, JP;
Yusuke Kinoshita, Minowa-machi, JP;
Inventors:
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/25 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention provides a piezoelectric substrate in the form of a rectangular plate in which a Rayleigh wave is propagated, and an IDT and a reflector are provided by forming interdigital electrodes on the piezoelectric substrate. At least an end face on a shorter side of the piezoelectric substrate on a top side thereof is formed as a vertical smooth surface that is substantially in parallel with a conductor strip at an end of the reflector in the position of an imaginary node of a stress wave exiting the conductor strip, thereby providing a reflecting end face to reflect the stress wave.