GB641471A - Piezoelectric crystal elements - Google Patents
Piezoelectric crystal elementsInfo
- Publication number
- GB641471A GB641471A GB37773/46A GB3777346A GB641471A GB 641471 A GB641471 A GB 641471A GB 37773/46 A GB37773/46 A GB 37773/46A GB 3777346 A GB3777346 A GB 3777346A GB 641471 A GB641471 A GB 641471A
- Authority
- GB
- United Kingdom
- Prior art keywords
- axes
- electric
- piezo
- electrodes
- order
- 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.)
- Expired
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
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02015—Characteristics of piezoelectric layers, e.g. cutting angles
-
- 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
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02157—Dimensional parameters, e.g. ratio between two dimension parameters, length, width or thickness
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
641,471. Piezo-electric crystals. WESTERN ELECTRIC CO., Inc. Dec. 23, 1946, No. 37773. Convention date, Aug. 9, 1943. [Class 40 (viii)] A thickness shear mode plate formed from one of the primary phosphates or arsenates of potassium or ammonium has its major faces parallel to one of the crystal axes (as shown, the Z axis) and inclined at 45 degrees to the other two axes) (as shown, the X and Y axes). This orientation gives the largest piezo-electric coefficient and, in the element shown, a minimum coupling with the face-shear mode of motion. The elements, constants of typical examples of which are given, may be provided with deposited electrodes of gold, platinum, aluminium - or silver, and the electrodes may cover only a restricted area of the surface in order to reduce spurious coupling. Frequency adjustment may be effected by nickel-plating. The element may be adapted to oscillate in the fundamental and second order shear modes as disclosed in Specification 554,963. Specifications 569,285, 641,469 and 641,470 also are referred to.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US497883A US2450010A (en) | 1943-08-09 | 1943-08-09 | Piezoelectric crystal apparatus |
| US637127A US2484635A (en) | 1943-08-09 | 1945-12-24 | Piezoelectric crystal apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB641471A true GB641471A (en) | 1950-08-16 |
Family
ID=27052640
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34524/46A Expired GB641469A (en) | 1943-08-09 | 1946-11-21 | Improved piezoelectric crystals |
| GB37773/46A Expired GB641471A (en) | 1943-08-09 | 1946-12-23 | Piezoelectric crystal elements |
| GB37772/46A Expired GB641470A (en) | 1943-08-09 | 1946-12-23 | Piezoelectric crystal elements |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34524/46A Expired GB641469A (en) | 1943-08-09 | 1946-11-21 | Improved piezoelectric crystals |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB37772/46A Expired GB641470A (en) | 1943-08-09 | 1946-12-23 | Piezoelectric crystal elements |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2484635A (en) |
| BE (1) | BE472576A (en) |
| FR (1) | FR938529A (en) |
| GB (3) | GB641469A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2680720A (en) * | 1944-06-08 | 1954-06-08 | Clevite Corp | Piezoelectric crystal body comprised of rubidium compound |
| USRE25413E (en) * | 1961-07-05 | 1963-07-09 | Temperature xc | |
| US3461408A (en) * | 1967-02-09 | 1969-08-12 | Bell Telephone Labor Inc | Oriented litao3 crystal and devices using same |
| US3694676A (en) * | 1971-03-17 | 1972-09-26 | Zenith Radio Corp | Shear mode piezoelectric filter |
| IT1086630B (en) * | 1976-03-19 | 1985-05-28 | Pentel Kk | TIP FOR BALLPOINT PEN AND PRODUCTION PROCESS |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2303375A (en) * | 1941-06-10 | 1942-12-01 | Bell Telephone Labor Inc | Rochelle salt piezoelectric crystal apparatus |
| GB569285A (en) * | 1942-11-21 | 1945-05-16 | Patelhold Patentverwertung | Piezo-electric device |
| US2373445A (en) * | 1943-01-18 | 1945-04-10 | Brush Dev Co | Piezoelectric device |
-
0
- BE BE472576D patent/BE472576A/xx unknown
-
1945
- 1945-12-24 US US637127A patent/US2484635A/en not_active Expired - Lifetime
-
1946
- 1946-11-21 GB GB34524/46A patent/GB641469A/en not_active Expired
- 1946-12-17 FR FR938529D patent/FR938529A/en not_active Expired
- 1946-12-23 GB GB37773/46A patent/GB641471A/en not_active Expired
- 1946-12-23 GB GB37772/46A patent/GB641470A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB641470A (en) | 1950-08-16 |
| GB641469A (en) | 1950-08-16 |
| FR938529A (en) | 1948-10-18 |
| US2484635A (en) | 1949-10-11 |
| BE472576A (en) |
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