发明名称 |
ELASTIC WAVE ELEMENT, AND ELECTRICAL APPARATUS AND DUPLEXER USING SAME |
摘要 |
An acoustic wave device (5) includes a piezoelectric substrate (6) made of a lithium niobate material having the Euler angles (&phgr;, &thetas;, ψ), an electrode (7) disposed on the piezoelectric substrate (6) for exciting a major acoustic wave of a wavelength λ, and a protective layer (8) disposed on the piezoelectric substrate (6) to cover the electrode (7). The protective layer (8) has a thickness greater than 0.27λ. The Euler angles satisfy −100°≦̸&thetas;≦̸−60°; 1.193&phgr;−2°≦̸ψ≦̸1.193&phgr;+2°; and either ψ≦̸−2&phgr;−3° or −2&phgr;+3°≦̸ψ. |
申请公布号 |
US2012139662(A1) |
申请公布日期 |
2012.06.07 |
申请号 |
US201013390115 |
申请日期 |
2010.10.29 |
申请人 |
FUJIWARA JOJI;HAMAOKA YOSUKE;TSURUNARI TETSUYA;NAKANISHI HIDEKAZU;NAKAMURA HIROYUKI;PANASONIC CORPORATION |
发明人 |
FUJIWARA JOJI;HAMAOKA YOSUKE;TSURUNARI TETSUYA;NAKANISHI HIDEKAZU;NAKAMURA HIROYUKI |
分类号 |
H03H9/25;H03H9/72 |
主分类号 |
H03H9/25 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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