FR2364544A1 - Piezoelectric polymer film stretched over doubly-curved frame - heating it gently to slightly shrink, pref. in the presence of an electric field (NL 15.3.78) - Google Patents

Piezoelectric polymer film stretched over doubly-curved frame - heating it gently to slightly shrink, pref. in the presence of an electric field (NL 15.3.78)

Info

Publication number
FR2364544A1
FR2364544A1 FR7727593A FR7727593A FR2364544A1 FR 2364544 A1 FR2364544 A1 FR 2364544A1 FR 7727593 A FR7727593 A FR 7727593A FR 7727593 A FR7727593 A FR 7727593A FR 2364544 A1 FR2364544 A1 FR 2364544A1
Authority
FR
France
Prior art keywords
pref
electric field
polymer film
gently
heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7727593A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2364544A1 publication Critical patent/FR2364544A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/08—Shaping or machining of piezoelectric or electrostrictive bodies
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/09—Forming piezoelectric or electrostrictive materials
    • H10N30/098—Forming organic materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

The film is made into a transducer by stretching it, smooth and crease-free, over a curved (e.g. saddle-back-shaped) frame. This is done by fixing the film to the frame, and the warming it sufficiently to shrink it somewhat, without destroying the piezo-electric properties. The polymer film is pref. furnished with electrodes on each side before it is fixed to the frame, and the warming is pref. done in the presence of an electric field. When the method is applied to films of polyvinylidenefluoride, the temp. used is pref. 70-90 degrees C.
FR7727593A 1976-09-13 1977-09-13 Piezoelectric polymer film stretched over doubly-curved frame - heating it gently to slightly shrink, pref. in the presence of an electric field (NL 15.3.78) Withdrawn FR2364544A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7610124A NL7610124A (en) 1976-09-13 1976-09-13 METHOD OF MANUFACTURING A PIEZO ELECTRIC TRANSDUCER.

Publications (1)

Publication Number Publication Date
FR2364544A1 true FR2364544A1 (en) 1978-04-07

Family

ID=19826878

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7727593A Withdrawn FR2364544A1 (en) 1976-09-13 1977-09-13 Piezoelectric polymer film stretched over doubly-curved frame - heating it gently to slightly shrink, pref. in the presence of an electric field (NL 15.3.78)

Country Status (4)

Country Link
JP (1) JPS5335492A (en)
DE (1) DE2739735A1 (en)
FR (1) FR2364544A1 (en)
NL (1) NL7610124A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009068A1 (en) * 1980-03-10 1981-09-24 Reinhard Dipl.-Ing. Lerch PIEZOPOLYMER CONVERTER WITH FIXED MEMBRANE SUPPORT
DE3036631A1 (en) * 1980-09-29 1982-05-19 Siemens AG, 1000 Berlin und 8000 München METHOD FOR PRODUCING FOCUSING PIEZO SWINGERS
FR2542552B1 (en) * 1983-03-07 1986-04-11 Thomson Csf ELECTROACOUSTIC TRANSDUCER WITH PIEZOELECTRIC DIAPHRAGM
FR2542553A1 (en) * 1983-03-07 1984-09-14 Thomson Csf DEVICE FOR RECOVERING A PIEZOELECTRIC DIAPHRAGM, ITS PRODUCTION METHOD AND ELECTROMECHANICAL TRANSDUCER USING SUCH A DEVICE
EP0174838A3 (en) * 1984-09-11 1989-08-02 Focas Limited Stabilized piezoelectric vinylidene fluoride polymers
EP3637487A1 (en) * 2018-10-09 2020-04-15 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Shear piezoelectric transducer

Also Published As

Publication number Publication date
NL7610124A (en) 1978-03-15
JPS5335492A (en) 1978-04-01
DE2739735A1 (en) 1978-03-16

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Legal Events

Date Code Title Description
ST Notification of lapse