Title:
CRYSTAL PART AND CRYSTAL OSCILLATOR
Document Type and Number:
WIPO Patent Application WO/2017/057167
Kind Code:
A1
Abstract:
A crystal part according to the present invention in which the long side of a principal surface thereof is substantially parallel to the Z' axis of the crystal part, the short side of the principal surface thereof is substantially parallel to the X axis thereof, and the frequency of the principal oscillation of the crystal part is 30.5-37.0 MHz, inclusive, the crystal part being characterized: by having a first region comprising the center of the principal surface, a second and a third region which are adjacent to the first region on both sides in the long-side direction in which the long side extends, and a fourth and a fifth region which are adjacent to the first region on both sides in the short-side direction in which the short side extends; in that the thickness of the first region is substantially uniform, the thickness of the second and third regions is less than the thickness of the first region, and/or the thickness of the fourth and fifth regions is less than the thickness of the first region; and in that given that the length of the short side is W and the thickness thereof is T, then 16.21≤W/T≤17.71.
Inventors:
YAMAMOTO HIROYUKI (JP)
KAIDA HIROAKI (JP)
ASAI MASARU (JP)
KAIDA HIROAKI (JP)
ASAI MASARU (JP)
Application Number:
PCT/JP2016/077964
Publication Date:
April 06, 2017
Filing Date:
September 23, 2016
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/19
Foreign References:
| JP2015170966A | 2015-09-28 | |||
| JP2009267888A | 2009-11-12 | |||
| JP2013034176A | 2013-02-14 | |||
| JPH07183759A | 1995-07-21 |
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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