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:
Jul. 12, 2011
Filed:
Feb. 24, 2010
Suguru Warashina, Kawasaki, JP;
Takashi Matsuda, Kawasaki, JP;
Shogo Inoue, Kawasaki, JP;
Yoshio Satoh, Kawasaki, JP;
Suguru Warashina, Kawasaki, JP;
Takashi Matsuda, Kawasaki, JP;
Shogo Inoue, Kawasaki, JP;
Yoshio Satoh, Kawasaki, JP;
Taiyo Yuden Co., Ltd., Tokyo, JP;
Abstract
An acoustic wave device of the present application includes a piezoelectric substrate (), interdigital transducer electrodes () formed on the piezoelectric substrate (), and an SiOfilm () formed so as to cover the electrodes (). The acoustic wave device also includes a displacement adjustment film () formed on the SiOfilm (), and the displacement adjustment film () is formed from a substance whose acoustic velocity is slower than that of the substance forming the SiOfilm (). According to this configuration, it is possible to suppress unnecessary waves as well as improve temperature characteristics. Also, by mounting such an acoustic wave device in a communication module or communication apparatus, it is possible to achieve an improvement in reliability.