JPS55105425A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS55105425A
JPS55105425A JP1259579A JP1259579A JPS55105425A JP S55105425 A JPS55105425 A JP S55105425A JP 1259579 A JP1259579 A JP 1259579A JP 1259579 A JP1259579 A JP 1259579A JP S55105425 A JPS55105425 A JP S55105425A
Authority
JP
Japan
Prior art keywords
electrode
surface wave
axis
theta
features
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
JP1259579A
Other languages
Japanese (ja)
Other versions
JPS6145891B2 (en
Inventor
Tsutomu Nishikawa
Kenji Shirai
Atsushi Tani
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
Original Assignee
Fujitsu 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 filed Critical Fujitsu Ltd
Priority to JP1259579A priority Critical patent/JPS55105425A/en
Publication of JPS55105425A publication Critical patent/JPS55105425A/en
Publication of JPS6145891B2 publication Critical patent/JPS6145891B2/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
    • H03H9/02543—Characteristics of substrate, e.g. cutting angles
    • H03H9/02551—Characteristics of substrate, e.g. cutting angles of quartz substrates

Landscapes

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

Abstract

PURPOSE:To increase the application band to about 1.6 times as much as conventional for the elastic surface wave device using the crystal, by giving consideration to the direction of the crystal axis and the structure of the electrode each. CONSTITUTION:The crystal plate is cut into the rotary Y-cut plate with inclination secured by theta to the Z axis, and cross finger type transducer T is formed in the direction of the Z' axis. Thus the propagation surface wave features the single mode. Inclination theta to the Z axis features approximately the relation of theta=(2833.3X<2>- 11.667X+36.083) degrees to mass load X. At this moment, X features as X=ah0/ (a+b)lambda, where h0 is the thickness of the electrode film, a is the width of the electrode finger, b is the distance between the electrode fingers, and lambda is the elastic surface wave length each. As a result, the application band can be increased about 1.6 tmes as much as conventional. Furthermore, aluminum electrode 3 is provided between the electrode fingers, and thus the displacement can be concentrated onto the surface. Thus the loss can be reduced.
JP1259579A 1979-02-06 1979-02-06 Elastic surface wave device Granted JPS55105425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1259579A JPS55105425A (en) 1979-02-06 1979-02-06 Elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1259579A JPS55105425A (en) 1979-02-06 1979-02-06 Elastic surface wave device

Publications (2)

Publication Number Publication Date
JPS55105425A true JPS55105425A (en) 1980-08-13
JPS6145891B2 JPS6145891B2 (en) 1986-10-11

Family

ID=11809695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1259579A Granted JPS55105425A (en) 1979-02-06 1979-02-06 Elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS55105425A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0860943A2 (en) * 1997-02-20 1998-08-26 Murata Manufacturing Co., Ltd. Surface acoustic wave device
EP0936733A2 (en) * 1998-02-16 1999-08-18 Murata Manufacturing Co., Ltd. Surface acoustic wave device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH054751Y2 (en) * 1987-09-07 1993-02-05

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
A THEORETICAL ANALYSIS OF SURFACE SKIMMING BULK WAVES=1978 *
THEORETICAL EXAMINATION OF SURFACE SKIMMING BULK WAVES=1978 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0860943A2 (en) * 1997-02-20 1998-08-26 Murata Manufacturing Co., Ltd. Surface acoustic wave device
EP0860943A3 (en) * 1997-02-20 2000-01-19 Murata Manufacturing Co., Ltd. Surface acoustic wave device
EP0936733A2 (en) * 1998-02-16 1999-08-18 Murata Manufacturing Co., Ltd. Surface acoustic wave device
EP0936733A3 (en) * 1998-02-16 2001-01-17 Murata Manufacturing Co., Ltd. Surface acoustic wave device

Also Published As

Publication number Publication date
JPS6145891B2 (en) 1986-10-11

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