Claims
- 1) A vibrating piece comprising: a base; and a vibration arm section formed so as to protrude from this base, a grooved portion being formed in at least one of the obverse surface and the rear surface of said vibration arm section, wherein a cut section is formed in said base, and an electrode section is formed in a part of said grooved portion.
- 2) A vibrating piece according to claim 1, wherein a grooved portion is formed in at least one of the obverse surface and the rear surface of said vibration arm section, and an electrode section is formed in a part of said grooved portion so that-the CI value ratio (crystal impedance) of said vibrating piece (CI value of the harmonic wave/CI value of the fundamental wave) becomes 1.0 or more.
- 3) A vibrating piece according to claim 2, wherein the length of the electrode section formed in a part of said grooved portion of said vibration arm section along the longitudinal direction is formed to be approximately 45% to approximately 55% with respect to the length of said vibration arm section.
- 4) A vibrating piece according to claim 1, wherein said electrode section is an excitation electrode.
- 5) A vibrating piece according to claim 1, wherein a fixation area for fixing the vibrating piece is provided in said base, and said cut section is provided in the base between the fixation area and said vibration arm section.
- 6) A vibrating piece according to claim 1, wherein said vibrating piece is a tuning-fork vibrating piece formed by a crystal which oscillates at approximately 30 kHz to approximately 40 kHz.
- 7) A vibrator having a vibrating piece housed in a package, said vibrating piece comprising: a base; and a vibration arm section formed so as to protrude from this base, a grooved portion being formed in at least one of the obverse surface and the rear surface of said vibration arm section, wherein a cut,section is formed in said base, and an electrode section is formed in a part of said grooved portion.
- 8) A vibrator according to claim 7, wherein a grooved portion is formed in at least one of the obverse surface and the rear surface of said vibration arm section, and an electrode section is formed in a part of said grooved portion so that the CI (crystal impedance) value ratio of said vibrating piece (CI value of the harmonic wave/CI value of the fundamental wave) becomes 1.0 or more.
- 9) A vibrator according to claim 8, wherein the length of the electrode section formed in a part of said grooved portion of said vibration arm section along the longitudinal direction is formed to be approximately 45% to approximately 55% with respect to the length of said vibration arm section.
- 10) A vibrator according to claim 7, wherein said electrode section is an excitation electrode.
- 11) A vibrator according to claim 7, wherein a fixation area for fixing the vibrating piece is provided in said base, and said cut section is provided in the base between the fixation area and said vibration arm section.
- 12) A vibrator according to claim 7, wherein said vibrating piece is a tuning-fork vibrating piece formed by a crystal which oscillates at approximately 30 kHz to approximately 40 kHz.
- 13) A vibrator according to claim 7, wherein said package is formed in a box shape.
- 14) A vibrator according to claim 7, wherein said package is formed in a commonly-called cylinder type.
- 15) An oscillator having a vibrating piece and an integrated circuit housed in a package, said vibrating piece comprising: a base; and a vibration arm section formed so as to protrude from this base, wherein a cut section is formed in said base, and an electrode section is formed in a part of said grooved portion.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2001-006638 |
Jan 2001 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional patent application of U.S. Ser. No. 10/047,420 filed Jan. 14, 2002, claiming priority to Japanese Application No. 2001-006638 filed Jan. 15, 2001, all of which are hereby incorporated by reference.
Divisions (1)
|
Number |
Date |
Country |
Parent |
10047420 |
Jan 2002 |
US |
Child |
10771666 |
Feb 2004 |
US |