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1. (US20090295507) ACOUSTIC WAVE ELEMENT

官庁 : アメリカ合衆国
出願番号: 12542733 出願日: 18.08.2009
公開番号: 20090295507 公開日: 03.12.2009
特許番号: 08390400 特許付与日: 05.03.2013
公報種別: B2
IPC:
H03H 9/02
H 電気
03
基本電子回路
H
インビーダンス回路網,例.共振回路;共振器
9
電気機械的または電気音響的素子を含む回路網;電気機械的共振器
02
細部
出願人: MURATA MANUFACTURING CO., LTD.
発明者: Kando Hajime
Kido Shunsuke
Nakao Takeshi
Yamamoto Daisuke
代理人: MURATA MANUFACTURING COMPANY, LTD.;C/O KEATING &; BENNETT, LLP
優先権情報: 2007082350 27.03.2007 JP
発明の名称: (EN) ACOUSTIC WAVE ELEMENT
要約: front page image
(EN)

An acoustic wave element includes an IDT electrode in contact with a piezoelectric material and including a plurality of electrode fingers, which include first and second electrode fingers that adjoin each other in an acoustic wave propagation direction and that connect to different potentials and a first dummy electrode finger facing the first electrode finger via a gap located on an outer side in an electrode finger length direction of the first electrode finger. At an area near the gap, first protrusions are provided in at least one of the first electrode finger and the first dummy electrode finger, the first protrusion protruding in the acoustic wave propagation direction from at least one of side edges of the at least one of the first electrode finger and the first dummy electrode finger. The acoustic wave element has greatly improved resonance characteristics of a resonance frequency and prevents short-circuit failure between electrode fingers and degradation in insulation properties.


また、:
KR1020090125104EP2128982JPWO2008126614CN101595641WO/2008/126614