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GB2020898A - Piezoelectric vibrator - Google Patents

Piezoelectric vibrator

Info

Publication number
GB2020898A
GB2020898A GB7911962A GB7911962A GB2020898A GB 2020898 A GB2020898 A GB 2020898A GB 7911962 A GB7911962 A GB 7911962A GB 7911962 A GB7911962 A GB 7911962A GB 2020898 A GB2020898 A GB 2020898A
Authority
GB
United Kingdom
Prior art keywords
spurious
electrodes
vibrating region
principal
piezoelectric element
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
GB7911962A
Other versions
GB2020898B (en
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch 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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Publication of GB2020898A publication Critical patent/GB2020898A/en
Application granted granted Critical
Publication of GB2020898B publication Critical patent/GB2020898B/en
Expired 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 elements; Electromechanical resonators
    • H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
    • H03H9/21—Crystal tuning forks
    • H03H9/215—Crystal tuning forks consisting of quartz
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/13—Driving means, e.g. electrodes, coils for networks consisting of piezoelectric or electrostrictive materials
    • H03H9/132—Driving means, e.g. electrodes, coils for networks consisting of piezoelectric or electrostrictive materials characterized by a particular shape
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
    • H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
    • H03H9/177—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator of the energy-trap type
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
    • H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
    • H03H9/19—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator consisting of quartz
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/56—Monolithic crystal filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/56—Monolithic crystal filters
    • H03H9/566—Electric coupling means therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

A piezoelectric vibrator (20) which comprises a piezoelectric element (22) including a main vibrating region and a spurious vibrating region. A principal driving electrode (24, 26) is formed on each surface of the main vibrating region of the piezoelectric element, and a spurious vibration reducing auxiliary electrode (28, 28') is formed on each surface of the spurious vibrating region, with the principal electrodes (24, 26) and the auxiliary electrodes (28, 28') forming a united energy trapping zone (32) within the piezoelectric element (22) to reduce spurious vibration in the spurious vibrating region. As an alternative to metal film electrodes, preferably covered with an insulating layer, electrodes may be formed by locally doping areas of a semiconductor layer on the vibrator to increase their conductivity. The principal and auxiliary electrodes may each be divided in two. <IMAGE>
GB7911962A 1978-04-05 1979-04-05 Piezoelectric vibrator Expired GB2020898B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3996478A JPS54131894A (en) 1978-04-05 1978-04-05 Piezoelectric oscillator

Publications (2)

Publication Number Publication Date
GB2020898A true GB2020898A (en) 1979-11-21
GB2020898B GB2020898B (en) 1982-12-22

Family

ID=12567635

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7911962A Expired GB2020898B (en) 1978-04-05 1979-04-05 Piezoelectric vibrator

Country Status (3)

Country Link
JP (1) JPS54131894A (en)
DE (1) DE2913798A1 (en)
GB (1) GB2020898B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158926A1 (en) * 1984-04-06 1985-10-23 Asulab S.A. Thickness-shearing mode vibrator
GB2238907A (en) * 1989-11-30 1991-06-12 Seikosha Kk Piezo-electric oscillator
EP0496583A2 (en) * 1991-01-25 1992-07-29 Seiko Electronic Components Ltd. KT cut width-extensional mode quartz crystal resonator
EP0680142A1 (en) * 1985-04-11 1995-11-02 Toyo Communication Equipment Co. Ltd. Piezoelectric resonators for overtone oscillations

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55112017A (en) * 1979-02-20 1980-08-29 Seiko Epson Corp Electrode of tuning fork type crystal oscillator
FR2464595A1 (en) * 1979-08-31 1981-03-06 Ebauches Sa METHOD FOR DETECTING THE ASYMMETRY OF DIAPASON-SHAPED PIEZOELECTRIC CRYSTAL RESONATORS AND RESONATORS FOR ITS IMPLEMENTATION
US4376919A (en) * 1979-10-16 1983-03-15 Seikosha Co., Ltd. Circuitry for switching effective electrode area on a crystal in a crystal oscillator to vary the oscillation frequency
JPH0666630B2 (en) * 1984-09-06 1994-08-24 日本電気株式会社 Energy trapped oscillator
JPS6179316A (en) * 1984-09-27 1986-04-22 Nippon Dempa Kogyo Co Ltd piezoelectric vibrator
JP2004056601A (en) * 2002-07-22 2004-02-19 Toyo Commun Equip Co Ltd Piezoelectric vibrator and its manufacturing method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158926A1 (en) * 1984-04-06 1985-10-23 Asulab S.A. Thickness-shearing mode vibrator
CH655224GA3 (en) * 1984-04-06 1986-04-15
US4618798A (en) * 1984-04-06 1986-10-21 Asulab A.S. Resonator vibrating in a thickness-shear mode
EP0680142A1 (en) * 1985-04-11 1995-11-02 Toyo Communication Equipment Co. Ltd. Piezoelectric resonators for overtone oscillations
GB2238907A (en) * 1989-11-30 1991-06-12 Seikosha Kk Piezo-electric oscillator
GB2238907B (en) * 1989-11-30 1993-05-26 Seikosha Kk Piezo-electric oscillator
EP0496583A2 (en) * 1991-01-25 1992-07-29 Seiko Electronic Components Ltd. KT cut width-extensional mode quartz crystal resonator
EP0496583A3 (en) * 1991-01-25 1993-09-22 Seiko Electronic Components Ltd. Kt cut width-extensional mode quartz crystal resonator
US5311096A (en) * 1991-01-25 1994-05-10 Seiko Electronic Components Ltd. KT cut width-extensional mode quartz crystal resonator

Also Published As

Publication number Publication date
GB2020898B (en) 1982-12-22
DE2913798A1 (en) 1979-10-11
JPS54131894A (en) 1979-10-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950405