GB650796A - Piezoelectric crystal elements - Google Patents
Piezoelectric crystal elementsInfo
- Publication number
- GB650796A GB650796A GB22769/47A GB2276947A GB650796A GB 650796 A GB650796 A GB 650796A GB 22769/47 A GB22769/47 A GB 22769/47A GB 2276947 A GB2276947 A GB 2276947A GB 650796 A GB650796 A GB 650796A
- Authority
- GB
- United Kingdom
- Prior art keywords
- axis
- degrees
- temperature coefficient
- zero temperature
- plane
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
650,796. Piezo-electric crystals. WESTERN ELECTRIC CO., Inc. Aug. 15, 1947, No. 22769. Convention date, Aug. 16, 1946. [Class 40 (viii)] A zero temperature coefficient ethylene diamine tartrate element has its thickness dimension inclined at from 40-70 degrees to the +Y axis towards the +X, +Z plane and contained in the same plane as the length dimension and the +Y axis, this plane being inclined at 45 degrees to the +Z axis towards the +X axis. The rectangular plate shown has its thickness dimension at 63 degrees to the +Y axis and has a zero temperature coefficient for longitudinal vibration along its length at +27.5 C. The element may be mounted in a sealed container or may be protected by a plastic film deposited from methanol or butanol. Divided electrodes may be applied to produce transverse or harmonic vibration and two plates may be cemented together to form a bending element. Specifications 578,791, 631,345 and 632,515, [both in Group XL (c)], are referred to. The Specification as open to inspection under Sect. 91 also states that a Z-cut ammonium dihydrogen phosphate element may be arranged to have a zero temperature coefficient by cementing a half-wave nickel-iron alloy bar to its major surface. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US690872A US2472753A (en) | 1946-08-16 | 1946-08-16 | Piezoelectric crystal apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB650796A true GB650796A (en) | 1951-03-07 |
Family
ID=24774324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22769/47A Expired GB650796A (en) | 1946-08-16 | 1947-08-15 | Piezoelectric crystal elements |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2472753A (en) |
| GB (1) | GB650796A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2666196A (en) * | 1949-06-07 | 1954-01-12 | Bell Telephone Labor Inc | Frequency station calling system using bifurcated piezoelectric elements |
| US3371234A (en) * | 1965-10-15 | 1968-02-27 | Walter G. Cady | Piezoelectric vibrators and systems embodying the same for converting the mechanical vibration thereof into electric energy |
| US3699484A (en) * | 1970-06-24 | 1972-10-17 | Vernitron Corp | Width extensional resonator and coupled mode filter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2292388A (en) * | 1941-05-23 | 1942-08-11 | Bell Telephone Labor Inc | Rochelle salt piezoelectric crystal apparatus |
| US2303375A (en) * | 1941-06-10 | 1942-12-01 | Bell Telephone Labor Inc | Rochelle salt piezoelectric crystal apparatus |
| US2309467A (en) * | 1941-07-25 | 1943-01-26 | Bell Telephone Labor Inc | Rochelle salt piezoelectric crystal apparatus |
-
1946
- 1946-08-16 US US690872A patent/US2472753A/en not_active Expired - Lifetime
-
1947
- 1947-08-15 GB GB22769/47A patent/GB650796A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2472753A (en) | 1949-06-07 |
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