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:
Nov. 17, 2009
Filed:
Nov. 01, 2006
Applicants:
Takashi Uno, Hyogo, JP;
Naohiro Tsurumi, Kyoto, JP;
Kazuhiro Yahata, Osaka, JP;
Hiroyuki Sakai, Kyoto, JP;
Inventors:
Takashi Uno, Hyogo, JP;
Naohiro Tsurumi, Kyoto, JP;
Kazuhiro Yahata, Osaka, JP;
Hiroyuki Sakai, Kyoto, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/15 (2006.01); H03H 9/54 (2006.01);
U.S. Cl.
CPC ...
Abstract
A bulk acoustic resonator has an acoustic reflector portion formed on a substrate and including one or more low acoustic impedance layers and one or more high acoustic impedance layers having a higher acoustic impedance than the low acoustic impedance layer which are disposed in stacked relation and an acoustic resonator portion formed on the acoustic reflector portion and having a piezoelectric film. At least one of the low acoustic impedance layers is made of silicon.