发明申请
- 专利标题: STACKED PIEZOELECTRIC DEVICE
- 专利标题(中): 堆叠式压电器件
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申请号: US12528677申请日: 2008-02-26
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公开(公告)号: US20100139621A1公开(公告)日: 2010-06-10
- 发明人: Atsushi Murai , Satoshi Suzuki , Toshiatu Nagaya , Akio Iwase , Akira Fujii , Shige Kadotani
- 申请人: Atsushi Murai , Satoshi Suzuki , Toshiatu Nagaya , Akio Iwase , Akira Fujii , Shige Kadotani
- 申请人地址: JP Kariya-city, Aichi-pref
- 专利权人: DENSO CORPORATION
- 当前专利权人: DENSO CORPORATION
- 当前专利权人地址: JP Kariya-city, Aichi-pref
- 优先权: JP2007-046071 20070226; JP2008-042112 20080222
- 国际申请: PCT/JP2008/053228 WO 20080226
- 主分类号: F02M51/00
- IPC分类号: F02M51/00 ; H01L41/083 ; H01L41/24 ; H01L41/047
摘要:
A stacked piezoelectric device 1 includes a ceramic laminate 15 formed by laminating a plurality of piezoelectric ceramic layers 11 and a plurality of inner electrode layers 13 and 14 alternately and a pair of side electrodes 17 and 18 formed on side surfaces thereof. The inner electrode layers 13 and 14 are connected electrically to either of the side electrodes. The ceramic laminate 15 has absorbing portions 12 formed in slit-like areas recessed inwardly from the side surfaces thereof. The stress absorbing portions are easier to deform than the piezoelectric ceramic layers 11. Adjacent two of the inner electrode layers 13 and 14 interleaving the stress absorbing portion 12 therebetween are both connected electrically to the positive side electrode 17.
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