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. 28, 1996
Filed:
Sep. 09, 1994
Masumi Hattori, Hirakata, JP;
Hideo Torii, Higashiosaka, JP;
Masaki Aoki, Minoo, JP;
Eiji Fujii, Yawata, JP;
Atsushi Tomozawa, Osaka, JP;
Ryoichi Takayama, Suita, JP;
Ken Kamata, Ikeda, JP;
Yasuhiko Horio, Osaka, JP;
Abstract
A surface wave filter element includes a portion on which elastic surface waves propagate. This portion includes a piezoelectric material, an amorphous boron layer or plate and IDT electrodes for inputting and outputting signals. The piezoelectric material is a film made of ZnO, LiNbO.sub.3 or LiTaO.sub.3 formed by sputtering, ion beam deposition or chemical vapor deposition. The amorphous boron layer or boron plate may be formed on a substrate made of an inorganic material. The boron material is formed using electron beam deposition, ion beam deposition or chemical vapor deposition.