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. 29, 1997
Filed:
Apr. 17, 1996
Applicant:
Inventor:
Jun Koike, Nagaokakyo, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ;
U.S. Cl.
CPC ...
333195 ; 3103 / ; 3103 / ;
Abstract
A SAW device formed by providing at least one interdigital transducer on a piezoelectric substrate which is prepared by forming a (1120) ZnO piezoelectric thin film on a (0112) plane .alpha.-Al.sub.2 O.sub.3 substrate, and forming reflectors on both sides of the interdigital transducer along a surface wave propagation direction. Each of the reflectors is so structured that a ratio H/.lambda. of its thickness H to a wavelength .lambda. of a surface wave is in a range of 0.015 to 0.041.