Title:
圧電型電気音響変換器およびその製造方法
Document Type and Number:
Japanese Patent JP3988672
Kind Code:
B2
Abstract:
A piezoelectric electro-acoustic transducer includes a substantially rectangular piezoelectric diaphragm, a casing having a support unit for supporting four corners of the piezoelectric diaphragm, terminals fixed to the casing such that an internal connection portion of the terminal is exposed in the vicinity of the support unit, a first elastic adhesive for coating between the external periphery of the piezoelectric diaphragm and the internal connection portion of the terminal therewith, a conductive adhesive for coating between electrodes of the piezoelectric diaphragm and the internal connection portion of the terminal via the upper surface of the first elastic adhesive therewith, and a second elastic adhesive for sealing the external periphery of the piezoelectric diaphragm and the internal periphery of the casing, and a cradle provided in the internal periphery of the casing as well as below the piezoelectric diaphragm in the vicinity that is coated with the first elastic adhesive for forming a gap for stopping flow of the first elastic adhesive at a position lower than the support unit as well as between the upper surface of the cradle and the bottom surface of the piezoelectric diaphragm.
Inventors:
Ishinori Mitsunori
Keiichi Kami
Tetsuo Takeshima
Yokoi Takeyuki
Keiichi Kami
Tetsuo Takeshima
Yokoi Takeyuki
Application Number:
JP2003102438A
Publication Date:
October 10, 2007
Filing Date:
April 07, 2003
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H04R17/00; B06B1/06; G10K9/12; G10K9/122; H01L41/053; H01L41/08; H04R17/02; H04R31/00
Domestic Patent References:
| JP2003009286A |
Attorney, Agent or Firm:
Hidetaka Tsutsui