发明授权
- 专利标题： Filter using piezoelectric material
- 专利标题（中）： 使用压电材料过滤
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申请号： US10950975申请日： 2004-09-28
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公开(公告)号： US07154360B2公开(公告)日： 2006-12-26
- 发明人: Koichi Wada , Satoshi Ichikawa , Hirotada Wachi , Tohru Takezaki , Tsuyoshi Oura , Toshifumi Tanaka , Satoshi Orito
- 申请人： Koichi Wada , Satoshi Ichikawa , Hirotada Wachi , Tohru Takezaki , Tsuyoshi Oura , Toshifumi Tanaka , Satoshi Orito
- 申请人地址： JP Kanagawa
- 专利权人： Fujitsu Media Devices Limited
- 当前专利权人： Fujitsu Media Devices Limited
- 当前专利权人地址： JP Kanagawa
- 代理机构： Arent Fox PLLC
- 优先权： JP2003-338854 20030929
- 主分类号： H03H9/00
- IPC分类号： H03H9/00 ; H03H9/13 ; H01L41/047
摘要：
A filter includes a piezoelectric substrate, and interdigital transducers (IDTs) that are formed on the piezoelectric substrate. At least one of the IDTs has a main electrode finger pattern that is weighted. The IDT having the main electrode finger pattern also has a sub electrode finger pattern that is connected in parallel to the main electrode finger pattern, and generates a surface acoustic wave that cancels a surface acoustic wave caused by leakage electric fields generated in the main electrode finger pattern.
公开/授权文献
- US20050093660A1 Filter using piezoelectric material 公开/授权日：2005-05-05