GB607500A - Improvements in and relating to piezoelectric apparatus - Google Patents

Improvements in and relating to piezoelectric apparatus

Info

Publication number
GB607500A
GB607500A GB3747/46A GB374746A GB607500A GB 607500 A GB607500 A GB 607500A GB 3747/46 A GB3747/46 A GB 3747/46A GB 374746 A GB374746 A GB 374746A GB 607500 A GB607500 A GB 607500A
Authority
GB
United Kingdom
Prior art keywords
plane
degrees
angle
crystal
feb
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
Application number
GB3747/46A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB607500A publication Critical patent/GB607500A/en
Expired legal-status Critical Current

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
    • H03H9/02023—Characteristics of piezoelectric layers, e.g. cutting angles consisting of quartz

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

607,500. Piezo-electric crystals &c. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 6, 1946, No. 3747. Convention date, Feb. 13, 1945. [Class 40 (v)] A quartz element 1 having a frequency of 50-250 k.c. in a face shear mode, and a low temperature coefficient of frequency, is cut from the natural crystal in a plane 4 which cuts the X, Y plane at an angle of 30 degrees (and thus includes a Y axis) and which is inclined to the Z axis at an angle in the range 45-60 degrees. The element 1 is rectangular and has its length dimension in either of two directions at an.angle of 45 degrees to the intersection of the crystal plane 4 and the X, Y plane. For particular values of the orientation angles, corresponding values of the ratio W/L. of the width to the length of the crystal are chosen to give a low temperature coefficient.
GB3747/46A 1945-02-13 1946-02-06 Improvements in and relating to piezoelectric apparatus Expired GB607500A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US577695A US2436202A (en) 1945-02-13 1945-02-13 Piezoelectric apparatus

Publications (1)

Publication Number Publication Date
GB607500A true GB607500A (en) 1948-09-01

Family

ID=24309779

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3747/46A Expired GB607500A (en) 1945-02-13 1946-02-06 Improvements in and relating to piezoelectric apparatus

Country Status (2)

Country Link
US (1) US2436202A (en)
GB (1) GB607500A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3375379A (en) * 1964-10-08 1968-03-26 Bell Telephone Labor Inc Rotated y-cut rectangular piezoelectric quartz crystal plates

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2173589A (en) * 1933-12-14 1939-09-19 Bell Telephone Labor Inc Piezoelectric apparatus
US2212139A (en) * 1936-03-18 1940-08-20 Rca Corp Piezoelectric quartz element
BE424774A (en) * 1936-11-25

Also Published As

Publication number Publication date
US2436202A (en) 1948-02-17

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