GB655994A - Improvements in or relating to piezo-electric crystals - Google Patents
Improvements in or relating to piezo-electric crystalsInfo
- Publication number
- GB655994A GB655994A GB32349/48A GB3234948A GB655994A GB 655994 A GB655994 A GB 655994A GB 32349/48 A GB32349/48 A GB 32349/48A GB 3234948 A GB3234948 A GB 3234948A GB 655994 A GB655994 A GB 655994A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piezo
- electric crystals
- relating
- degrees
- angle
- 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)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
655,994. Piezo-electric crystals. POSTMASTER GENERAL. Dec. 14, 1948, No. 32349. Drawings to Specification. [Class 40 (viii)] A square plate of ethylene diamine tartrate for operation in the face shear mode is cut such that the angle between the normal to the square face and the + X axis lies between the + X and - Z axes and is selected so that the temperature coefficient is zero within the range 20-50‹ C., or such that over this range the variation from the average value of resonant frequency is not greater than 750 parts in a million. The angle is preferably +17 degrees or +77 degrees.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB283219X | 1948-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB655994A true GB655994A (en) | 1951-08-08 |
Family
ID=10273824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB32349/48A Expired GB655994A (en) | 1948-12-14 | 1948-12-14 | Improvements in or relating to piezo-electric crystals |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE492734A (en) |
CH (1) | CH283219A (en) |
GB (1) | GB655994A (en) |
-
0
- BE BE492734D patent/BE492734A/xx unknown
-
1948
- 1948-12-14 GB GB32349/48A patent/GB655994A/en not_active Expired
-
1949
- 1949-12-13 CH CH283219D patent/CH283219A/en unknown
Also Published As
Publication number | Publication date |
---|---|
BE492734A (en) | |
CH283219A (en) | 1952-05-31 |
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