Piezoelectric device and process for production thereof
First Claim
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1. A sheet-form piezoelectric device, comprising:
- a polymeric piezoelectric film or sheet, and a perforated sheet electrode embedded within at least one surface layer of the piezoelectric film or sheet;
wherein(a) said polymeric piezoelectric film or sheet has a thickness of 50-2000 μ
m, and(b) said perforated sheet electrode is(i) a mesh electrode having a perforation of 20-350 μ
m and a wire diameter of 20-300 μ
m, or(ii) a bored plate electrode having a thickness of 10-800 μ
m and an areal opening ratio of 10-70%.
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Abstract
A sheet-form piezoelectric device having improved mechanical strengths as represented by an electrode peel strength while retaining flexibility and piezoelectric performances of a polymer-type piezoelectric device, is obtained by embedding a perforated sheet electrode into at least one surface layer of a polymer piezoelectric film treated with a solvent in advance. The sheet-form piezoelectric device may be wound or curved about a certain central axis to provide a tubular or curved piezoelectric device having wave-transmitting and/or -receiving characteristics suitable for wave-transmitting and/or -receiving devices, such as a hydrophone and microphone.
82 Citations
4 Claims
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1. A sheet-form piezoelectric device, comprising:
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a polymeric piezoelectric film or sheet, and a perforated sheet electrode embedded within at least one surface layer of the piezoelectric film or sheet;
wherein(a) said polymeric piezoelectric film or sheet has a thickness of 50-2000 μ
m, and(b) said perforated sheet electrode is (i) a mesh electrode having a perforation of 20-350 μ
m and a wire diameter of 20-300 μ
m, or(ii) a bored plate electrode having a thickness of 10-800 μ
m and an areal opening ratio of 10-70%.
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2. The tubular piezoelectric device, comprising:
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a sheet-form piezoelectric device formed by embedding a perforated sheet electrode within a surface layer of a polymer piezoelectric film or sheet, and wound around a certain central axis into a tube, and wherein; (a) said polymeric piezoelectric film or sheet has a thickness of 50-2000 μ
m, and(b) said perforated sheet electrode is (i) a mesh electrode having a perforation of 20-350 μ
m and a wire diameter of 20-300 μ
m or(ii) a bored plate electrode having a thickness of 10-800 μ
m and an areal opening ratio of 10-70%. - View Dependent Claims (3)
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4. A curved piezoelectric device, comprising:
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a sheet-form piezoelectric device formed by embedding a perforated sheet electrode within a surface layer of a polymer piezoelectric film or sheet, and formed into a curved shape with respect to a certain central axis, and wherein; (a) said polymeric piezoelectric film or sheet has a thickness of 50-2000 μ
m, and(b) said perforated sheet electrode is (i) a mesh electrode having a perforation of 20-350 μ
m and a wire diameter of 20-300 μ
m or(ii) a bored plate electrode having a thickness of 10-800 μ
m and an areal opening ratio of 10-70%.
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Specification
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Current AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
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Original AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
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InventorsSato, Takashi, Nakamura, Kenichi, Suzuki, Kazuyuki, Moriyama, Nobuhiro
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Primary Examiner(s)BUDD, MARK OSBORNE
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Application NumberUS08/156,724Time in Patent Office517 DaysField of Search310/363, 310/369, 310/800, 310/346US Class Current310/363CPC Class CodesH04R 17/00 Piezoelectric transducers; ...H10N 30/098 Forming organic materialsH10N 30/30 with mechanical input and e...H10N 30/87 Electrodes or interconnecti...Y10S 310/80 Piezoelectric polymers, e.g...
