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:
Mar. 01, 2011
Filed:
Mar. 24, 2009
Masakazu Mimura, Kusatsu, JP;
Yasuhisa Fujii, Kanazawa, JP;
Masaru Yata, Kanazawa, JP;
Norihiko Nakahashi, Ishikawa-gun, JP;
Masakazu Mimura, Kusatsu, JP;
Yasuhisa Fujii, Kanazawa, JP;
Masaru Yata, Kanazawa, JP;
Norihiko Nakahashi, Ishikawa-gun, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A boundary acoustic wave device includes a piezoelectric substance made of LiNbOhaving a surface obtained by rotating a Y axis by about 15°±10° as a primary surface, a dielectric substance which is made of a silicon oxide and which is laminated to the piezoelectric substance, and an electrode structure disposed at a boundary between the piezoelectric substance and the dielectric substance and which includes an IDT arranged to utilize a boundary acoustic wave propagating along the boundary. When the density of the IDT, the thickness thereof, the wavelength deter-mined by the period of electrode fingers of the IDT, and the duty ratio thereof are represented by ρ (kg/m), H (μm), λ (μm), and x, respectively, x and the product of H/λ and ρ are set in a range that satisfies the following formula (1):(/λ)×ρ>70.7924(+0.055)+797.09  Formula (1).