JPS56138317A - Elastic surface wave element - Google Patents

Elastic surface wave element

Info

Publication number
JPS56138317A
JPS56138317A JP4183380A JP4183380A JPS56138317A JP S56138317 A JPS56138317 A JP S56138317A JP 4183380 A JP4183380 A JP 4183380A JP 4183380 A JP4183380 A JP 4183380A JP S56138317 A JPS56138317 A JP S56138317A
Authority
JP
Japan
Prior art keywords
converter
pyroelectricity
energizing
reed
film
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.)
Granted
Application number
JP4183380A
Other languages
Japanese (ja)
Other versions
JPS6219089B2 (en
Inventor
Hiroaki Sato
Shigeo Nishiyama
Yoshifumi Toda
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.)
Fujitsu Ltd
Nihon Dempa Kogyo Co Ltd
Original Assignee
Fujitsu Ltd
Nihon Dempa Kogyo Co Ltd
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 Fujitsu Ltd, Nihon Dempa Kogyo Co Ltd filed Critical Fujitsu Ltd
Priority to JP4183380A priority Critical patent/JPS56138317A/en
Publication of JPS56138317A publication Critical patent/JPS56138317A/en
Publication of JPS6219089B2 publication Critical patent/JPS6219089B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02921—Measures for preventing electric discharge due to pyroelectricity

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To suppress the production of discharge based on the pyroelectricity when a rapid temperature change is caused, by covering the crystal surface except the energizing converter and reception converter with electric conductor and covering the residual surface including the converters with resistive film. CONSTITUTION:On the surface of the piezoelectric crystal plate 41 having pyroelectricity, the reed-screen-shaped electrode by the conductive thin film is formed with photoetching, one reed-screen electrode is taken as the energizing converter converter 12R is covered with the metallic film 42 being electric 12S and another reed-screen electrode is taken as the reception converter 12R. The surface of the crystal plate 41 except the energizing converter 12S and reception conductor and the surface forming the converters 12S, 12R is covered with the resistive film 43. The film thickness (h) of the resistive film 43 and the specific resistivity rho are obtained so that rho/h is <=10<12> ohms - >=10<10> ohms at room temperature. Further, if rapid temperature change is caused to the crystal plate 41, the production of discharge based on the pyroelectricity is suppressed, allowing stable operation.
JP4183380A 1980-03-31 1980-03-31 Elastic surface wave element Granted JPS56138317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4183380A JPS56138317A (en) 1980-03-31 1980-03-31 Elastic surface wave element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4183380A JPS56138317A (en) 1980-03-31 1980-03-31 Elastic surface wave element

Publications (2)

Publication Number Publication Date
JPS56138317A true JPS56138317A (en) 1981-10-28
JPS6219089B2 JPS6219089B2 (en) 1987-04-27

Family

ID=12619257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4183380A Granted JPS56138317A (en) 1980-03-31 1980-03-31 Elastic surface wave element

Country Status (1)

Country Link
JP (1) JPS56138317A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180317A (en) * 1984-02-28 1985-09-14 Toyo Commun Equip Co Ltd Package for saw device or the like
JPH04102321U (en) * 1991-02-06 1992-09-03 日本電気株式会社 surface acoustic wave device
EP0785620A2 (en) * 1996-01-19 1997-07-23 Nec Corporation Surface acoustic wave device
EP1206035A2 (en) * 2000-11-09 2002-05-15 Nec Corporation Saw filter device and package for accommodating the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0241670A (en) * 1988-07-29 1990-02-09 Shimada Phys & Chem Ind Co Ltd Driving gear
JPH0251372A (en) * 1988-08-10 1990-02-21 Shimada Phys & Chem Ind Co Ltd Ultrasonic drive

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5616312A (en) * 1979-07-20 1981-02-17 Murata Mfg Co Ltd Surface elastic wave device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5616312A (en) * 1979-07-20 1981-02-17 Murata Mfg Co Ltd Surface elastic wave device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180317A (en) * 1984-02-28 1985-09-14 Toyo Commun Equip Co Ltd Package for saw device or the like
JPH04102321U (en) * 1991-02-06 1992-09-03 日本電気株式会社 surface acoustic wave device
EP0785620A2 (en) * 1996-01-19 1997-07-23 Nec Corporation Surface acoustic wave device
EP0785620A3 (en) * 1996-01-19 1998-05-06 Nec Corporation Surface acoustic wave device
US5889446A (en) * 1996-01-19 1999-03-30 Nec Corporation Surface acoustic wave device with a resistor thin film to remove pyroelectric effect charges
EP1206035A2 (en) * 2000-11-09 2002-05-15 Nec Corporation Saw filter device and package for accommodating the same
EP1206035A3 (en) * 2000-11-09 2008-10-22 Nihon Dempa Kogyo Co., Ltd. Saw filter device and package for accommodating the same

Also Published As

Publication number Publication date
JPS6219089B2 (en) 1987-04-27

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