JPS6468113A - Electrode structure for idt exciting type piezoelectric resonator - Google Patents
Electrode structure for idt exciting type piezoelectric resonatorInfo
- Publication number
- JPS6468113A JPS6468113A JP22548587A JP22548587A JPS6468113A JP S6468113 A JPS6468113 A JP S6468113A JP 22548587 A JP22548587 A JP 22548587A JP 22548587 A JP22548587 A JP 22548587A JP S6468113 A JPS6468113 A JP S6468113A
- Authority
- JP
- Japan
- Prior art keywords
- idt
- film thickness
- electrode
- hio
- width
- 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
Links
Landscapes
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
PURPOSE:To decrease the bulk radiation loss caused by the disturbance in the electrode finger pitch without requiring much man-hour for the design by forming an IDT and an electrode finger of a reflecting grating to be in continuous equal period and making the electrode film thickness or the width of the electrode finger of both different from each other by a prescribed quantity. CONSTITUTION:Pitches PI, PR of the IDT 1 and the reflecting grating 2 and a gap PG between both are made equal to each other and then the width of the electrode finger of both has a difference. For example, both sides of the IDT electrode fingers 1, 1 are cut off, the width is changed from LI into LI' and the gap is changed from SI into SI'. In selecting the electrode film thickness of both in this case as HIO, HRO, then it is equivalent to vary effectively the IDT electrode film thickness by selecting HIO=HRO and L'I LI/HIO and S'I=PI- L'I. Thus, since it is possible to make the film thickness of the IDT and that of the reflecting grating equal to each other, the design and manufacture are facilitated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62225485A JP2775255B2 (en) | 1987-09-09 | 1987-09-09 | Electrode structure of IDT-excited piezoelectric resonator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62225485A JP2775255B2 (en) | 1987-09-09 | 1987-09-09 | Electrode structure of IDT-excited piezoelectric resonator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6468113A true JPS6468113A (en) | 1989-03-14 |
JP2775255B2 JP2775255B2 (en) | 1998-07-16 |
Family
ID=16830064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62225485A Expired - Fee Related JP2775255B2 (en) | 1987-09-09 | 1987-09-09 | Electrode structure of IDT-excited piezoelectric resonator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2775255B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003046370A (en) * | 2001-07-30 | 2003-02-14 | Toyo Commun Equip Co Ltd | Longitudinal coupling dual mode saw filter |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60140918A (en) * | 1983-12-28 | 1985-07-25 | Toshiba Corp | Surface acoustic wave resonator |
JPS611922U (en) * | 1984-06-08 | 1986-01-08 | 関西日本電気株式会社 | surface acoustic wave device |
-
1987
- 1987-09-09 JP JP62225485A patent/JP2775255B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60140918A (en) * | 1983-12-28 | 1985-07-25 | Toshiba Corp | Surface acoustic wave resonator |
JPS611922U (en) * | 1984-06-08 | 1986-01-08 | 関西日本電気株式会社 | surface acoustic wave device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003046370A (en) * | 2001-07-30 | 2003-02-14 | Toyo Commun Equip Co Ltd | Longitudinal coupling dual mode saw filter |
Also Published As
Publication number | Publication date |
---|---|
JP2775255B2 (en) | 1998-07-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |