JPS5549016A - Elastic surface-wave propagation element - Google Patents

Elastic surface-wave propagation element

Info

Publication number
JPS5549016A
JPS5549016A JP12153378A JP12153378A JPS5549016A JP S5549016 A JPS5549016 A JP S5549016A JP 12153378 A JP12153378 A JP 12153378A JP 12153378 A JP12153378 A JP 12153378A JP S5549016 A JPS5549016 A JP S5549016A
Authority
JP
Japan
Prior art keywords
electrodes
wave propagation
elastic surface
confront
electrode fingers
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.)
Pending
Application number
JP12153378A
Other languages
Japanese (ja)
Inventor
Yoshishige Miura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12153378A priority Critical patent/JPS5549016A/en
Publication of JPS5549016A publication Critical patent/JPS5549016A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
    • H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
    • H03H3/08—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of resonators or networks using surface acoustic waves

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To make it possible to improve the yield of an element manufacturing process and mass-producibility, by partially covewring a part between electrode fingers in regions, which do not confront each other in an elastic surface-wave propagation direction, with a metal coating. CONSTITUTION:A thin-film elastic surface-wave propagation element is provided additionally with metal film 14 (indicated by slanting dotted lines) and electrode fingers of reed screen type electrodes 11, 11 opposing mutually are formed without an electrode finger clearance in regions which do not confront. Opposiing electrodes 15 and 16 of reed screen type electrodes 11 and 12 are shown by 15 and 16. Adding thin film 14 like this excit an elastic wave there, but since its wavelength differ remarkably from that excited where electrode fingers of electrodes 11 confront mutually in an elastic surface-wave propagation direction, a bad influence is exerted direct to element characteristics. Namely, there is no need to form and position accurately opposite electrodes, so that its yield and mass producibility can remarkably be improved.
JP12153378A 1978-10-04 1978-10-04 Elastic surface-wave propagation element Pending JPS5549016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12153378A JPS5549016A (en) 1978-10-04 1978-10-04 Elastic surface-wave propagation element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12153378A JPS5549016A (en) 1978-10-04 1978-10-04 Elastic surface-wave propagation element

Publications (1)

Publication Number Publication Date
JPS5549016A true JPS5549016A (en) 1980-04-08

Family

ID=14813584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12153378A Pending JPS5549016A (en) 1978-10-04 1978-10-04 Elastic surface-wave propagation element

Country Status (1)

Country Link
JP (1) JPS5549016A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4363990A (en) * 1979-12-13 1982-12-14 Matsushita Electric Industrial Co., Ltd. Surface acoustic wave transducer
JPS61261218A (en) * 1985-05-10 1986-11-19 バスフ　アクチェン　ゲゼルシャフト Manufacture of cobalt-containing ferrimagnetic needle-like crystal iron oxide
JPS63170222A (en) * 1986-12-30 1988-07-14 Showa Denko Kk Production of lepidocrocite
JPH04114225U (en) * 1991-03-26 1992-10-07 ミツミ電機株式会社 surface acoustic wave device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4363990A (en) * 1979-12-13 1982-12-14 Matsushita Electric Industrial Co., Ltd. Surface acoustic wave transducer
JPS61261218A (en) * 1985-05-10 1986-11-19 バスフ　アクチェン　ゲゼルシャフト Manufacture of cobalt-containing ferrimagnetic needle-like crystal iron oxide
JPS63170222A (en) * 1986-12-30 1988-07-14 Showa Denko Kk Production of lepidocrocite
JPH0369848B2 (en) * 1986-12-30 1991-11-05 Showa Denko Kk
JPH04114225U (en) * 1991-03-26 1992-10-07 ミツミ電機株式会社 surface acoustic wave device

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