JPS6468113A - Electrode structure for idt exciting type piezoelectric resonator - Google Patents

Electrode structure for idt exciting type piezoelectric resonator

Info

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
Application number
JP22548587A
Other languages
Japanese (ja)
Other versions
JP2775255B2 (en
Inventor
Hiroshi Shimizu
Yuji Suzuki
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP62225485A priority Critical patent/JP2775255B2/en
Publication of JPS6468113A publication Critical patent/JPS6468113A/en
Application granted granted Critical
Publication of JP2775255B2 publication Critical patent/JP2775255B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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  • 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.
JP62225485A 1987-09-09 1987-09-09 Electrode structure of IDT-excited piezoelectric resonator Expired - Fee Related JP2775255B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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