JPS6095731U

JPS6095731U - surface acoustic wave device

Info

Publication number: JPS6095731U
Application number: JP18952483U
Authority: JP
Inventors: 竹彦曽根; 武広蛸島; 芳省上條
Original assignee: アルプス電気株式会社
Priority date: 1983-12-08
Filing date: 1983-12-08
Publication date: 1985-06-29
Also published as: JPH0221793Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の弾性表面波素子による共振子の導波路モ
ードによる不要波対策を示した平面図、第２Ａ図、第２
Ｂ図はバルク波へのモード変換を阻止する従来の対策を
示した部分断面拡大図、第３図は本考案による弾性表面
波素子の一例を示す基板表面の平面図、第４Ａ図、第４
Ｂ図は基板表面め一部断面を実施例別に示した拡大図で
ある。１０−・・圧電基板、１１−・・電極、ｌｌａ、ｌｌｂ
・・・すだれ状導電体、１２・・・反射器、１２ａ・・
・不連続部。補正　昭５９．７．９考案の名称を次のように補正する。 ■考案の名称　　弾性表面波素子　　　　　　　−実用
新案登録請求の、範囲、図面の簡単な説明を次のように
補正する。Ｏ実用新案登録請求の範囲（１）圧電基板の表面に電極が設けられ、この電極の両
側には格子状に配列された複数のストライプより成る反
射器が設けられている弾性表面波素子において、前記反
射器を構成しているＸ、）ライブの長さ寸法は、電極に
近づく方向と電極から離れる方向との両方向に向かって
徐々に短くなるように形成されていることを特徴とする
弾性表面波素子。（２）ストライプは、圧電基板の表面に付着された金属
または誘電体によって形成されている実用新案登録請求
の範囲第（１）項記載の弾性表面波素子。（３）ストライプは、圧電基板の表面に設けた溝によっ
て形成されている実用新案登録請求の範囲第（１）項記
載の弾性表面波素子。図面の簡単な説明　　　　　　　　゛第１図は従来の弾性表面波素子による共振子の導波路モ
ードによる不要波対策を示した平面図、第２Ａ図、第２
Ｂ図はバルク波へのモード変換を阻止する従来の対策を
示した部分断面拡大図、第３図は本考案による弾性表面
波素子の一例を示す基板表面の平面図、第４Ａ図、第４
Ｂ図は基板表面の一部断面を実施例別に示した拡大図で
ある。１０−・・圧電基板、１１’−・・電極、１１ａ、１１
ｂ・・・すだれ状導電体、１２・・・反射器、１２ａ・
・・ストライプ。Figure 1 is a plan view showing measures against unnecessary waves using the waveguide mode of a resonator using a conventional surface acoustic wave element;
Figure B is an enlarged partial cross-sectional view showing a conventional measure to prevent mode conversion into bulk waves, Figure 3 is a plan view of the substrate surface showing an example of a surface acoustic wave element according to the present invention, Figures 4A and 4.
Figure B is an enlarged view showing a partial cross section of the substrate surface for each example. 10--Piezoelectric substrate, 11--Electrode, lla, llb
...Band-shaped conductor, 12...Reflector, 12a...
・Discontinuity. Amendment July 9, 1982 The name of the invention is amended as follows. ■Name of the invention Surface acoustic wave device - The scope and brief description of the drawings of the utility model registration claim are amended as follows. Utility Model Registration Claims (1) A surface acoustic wave element in which an electrode is provided on the surface of a piezoelectric substrate, and a reflector consisting of a plurality of stripes arranged in a grid is provided on both sides of the electrode, An elastic surface characterized in that the length of the X, Wave element. (2) The surface acoustic wave device according to claim (1), wherein the stripes are formed of metal or dielectric material adhered to the surface of the piezoelectric substrate. (3) The surface acoustic wave device according to claim (1), wherein the stripes are formed by grooves provided on the surface of the piezoelectric substrate. Brief explanation of the drawings ゛Figure 1 is a plan view showing measures against unnecessary waves by the waveguide mode of a resonator using a conventional surface acoustic wave element, Figure 2A, Figure 2
Figure B is an enlarged partial cross-sectional view showing a conventional measure to prevent mode conversion into bulk waves, Figure 3 is a plan view of the substrate surface showing an example of a surface acoustic wave element according to the present invention, Figures 4A and 4.
Figure B is an enlarged view showing a partial cross section of the substrate surface for each example. 10--Piezoelectric substrate, 11'--Electrode, 11a, 11
b... Interdigital conductor, 12... Reflector, 12a.
··stripe.

Claims

[Claims for Utility Model Registration] (1) In a surface acoustic wave element in which an electrode is provided on the surface of a piezoelectric substrate, and reflectors formed by discontinuous portions arranged in a grid are provided on both sides of the electrode. , an elastic surface characterized in that the length dimension of the discontinuous part constituting the reflector is formed so as to gradually become shorter in both directions toward the electrode and away from the electrode. wave element +,
t"T*!ig□, ENG, -9*i)'('t!60E. The surface acoustic wave device according to claim (1) of the utility model registration, which is shaped by a genus or a dielectric material. (3) The surface acoustic wave device according to claim 1, wherein the discontinuous portion is formed by a groove provided on the surface of the piezoelectric substrate.