GB656818A - Improvements in or relating to piezoelectric crystal plates - Google Patents
Improvements in or relating to piezoelectric crystal platesInfo
- Publication number
- GB656818A GB656818A GB32434/48A GB3243448A GB656818A GB 656818 A GB656818 A GB 656818A GB 32434/48 A GB32434/48 A GB 32434/48A GB 3243448 A GB3243448 A GB 3243448A GB 656818 A GB656818 A GB 656818A
- Authority
- GB
- United Kingdom
- Prior art keywords
- degrees
- plane
- outline
- minimum
- axis
- 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
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
656,818. Piezo-electric crystals. BRUSH DEVELOPMENT CO. Dec. 15, 1948, No. 32434. Convention date, April 29. [Class 40 (viii)] A plate or bar of quadrilateral outline and made of ethylene diamene tartrate has the normal to its electroded face inclined at not more than 17 degrees to the Y axis, Fig. 1 (not shown), and has the projection on the X, Z plane of one side of the outline within 4 degrees of the angles + 64 degrees or - 26 degrees with respect to the X axis. The elements may have a trapezoidal outline but are preferably reactangular as shown at 12, 14 and 15 (Fig. 3), and are suitable for operation in fundamental or harmonic face shear mode. The minimum of the temperature coefficient curve for elements parallel to the X, Z plane occurs at 76‹ C., but the minimum may be moved to a lower temperature by rotating the element out of this plane. Specification 656,819 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US656818XA | 1948-04-29 | 1948-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB656818A true GB656818A (en) | 1951-09-05 |
Family
ID=22064404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32434/48A Expired GB656818A (en) | 1948-04-29 | 1948-12-15 | Improvements in or relating to piezoelectric crystal plates |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB656818A (en) |
-
1948
- 1948-12-15 GB GB32434/48A patent/GB656818A/en not_active Expired
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