Title:
CRYSTAL OSCILLATION ELEMENT AND CRYSTAL OSCILLATOR
Document Type and Number:
WIPO Patent Application WO/2022/080426
Kind Code:
A1
Abstract:
The present invention comprises a crystal piece having a main surface defined by a first base axis and a second base axis that intersects with the first base axis, and an excitation electrode part provided to the main surface of the crystal piece. When a voltage is applied to the excitation electrode part, the crystal piece undergoes thickness-shear vibration in which a surface defined by the thickness direction and the first base axis vibrates, the thickness direction being a direction intersecting the main surface. The excitation electrode part has a flat plate part and a thick part which is located at an electrode end in a direction along the main surface of the crystal piece and which is thicker than the flat plate part. The thick part has: a first protruding part which is positioned at an end of the main surface in the axis direction of the first base axis, and which protrudes from the flat plate part extending in the axis direction of the second base axis; and a second protruding part which is positioned at an end of the main surface in the axis direction of the second base axis and which protrudes from the flat plate part extending in the axis direction of the first base axis. The cross-sectional area of the first protruding part in a cross-section taken in a direction along a surface defined by the first base axis and the thickness direction of the crystal piece is greater than the cross-sectional area of the second protruding part in a cross-section taken in a direction along a surface defined by the second base axis and the thickness direction of the crystal piece.
Inventors:
NISHIMURA TOSHIO (JP)
Application Number:
PCT/JP2021/037940
Publication Date:
April 21, 2022
Filing Date:
October 13, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/19
Foreign References:
| JP2014127743A | 2014-07-07 | |||
| JP2003273682A | 2003-09-26 | |||
| JP2010074840A | 2010-04-02 | |||
| JPH1168501A | 1999-03-09 | |||
| JP2015089093A | 2015-05-07 |
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
Download PDF:
Previous Patent: VEHICLE LAMP, AND CONTROL DEVICE AND CONTROL METHOD FOR SAME
Next Patent: DISC SPRING MANUFACTURING METHOD, AND DISC SPRING
Next Patent: DISC SPRING MANUFACTURING METHOD, AND DISC SPRING