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:
Dec. 06, 1994
Filed:
Sep. 30, 1992
Yasuhide Murakami, Kumagaya, JP;
Kohei Ito, Fukaya, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A circuit element utilizing magnetostatic is formed with an acoustic wave absorbing layer on the other major surface of a non-magnetic substrate remote from the major surface where a magnetostatic wave propagation medium is formed, for the purpose of effectively suppressing an unnecessary spurious mode over a wide frequency band so as to obviate undesirable degradation of the resonance characteristic. That is, the circuit element utilizing the magnetostatic wave includes a thin film of YIG formed on one of the major surfaces of the non-magnetic substrate of GGG by the method of liquid phase epitaxial growth, and electrodes formed on the YIG thin film. In the circuit element, an acoustic wave absorbing layer is formed on the other major surface of the GGG substrate remote from the major surface where the YIG thin film is formed.