Title:
RESONATOR DEVICE, PIEZO-RESONATOR DEVICE AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JP3681929
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a piezoelectric part such as a resonator which is easily manufactured, can be miniaturized, satisfactorily maintains a resonance charac teristic and also is excellent in durability and to provide its manufacturing method.
SOLUTION: In this resonator device which is provided with a piezoelectric element 1, lead terminals 3 made of a conductive wire where a tapered receiving groove 12 holding the end part of the element 1 is formed at the upper edge part by press working and capacitor elements 2 connected to the outer peripheral part of the upper edge part of the terminal 3 in the state that the end part of the element 1 is held in the groove 12 of the terminal 3 and constituting a resonance circuit together with the element 1, the difference between the coefficient of thermal expansion of piezoelectric ceramics constituting the piezoelectric element 1 and the coefficient of thermal expansion of dielectric ceramics constituting the capacitor element 2 is made to ≤5 ppm/°C. Also, the surface area of the element 1 coming into contact with a vibration space is preferably 3.0±0.4 mm2, for instance, when a frequency band is 3 MHz.
More Like This:
| WO/2001/045164 | METHOD FOR INTERCONNECTING INTEGRATED CIRCUITS |
| JPH0736463 | [Name of invention] Hall element |
Inventors:
Toru Takahashi
Yuichi Sugawara
Yuichi Sugawara
Application Number:
JP22012299A
Publication Date:
August 10, 2005
Filing Date:
August 03, 1999
Export Citation:
Assignee:
tdk Corporation
International Classes:
H01L23/48; H03H3/02; H03H9/02; H03H9/13; H03H9/17; (IPC1-7): H03H9/17; H01L23/48; H03H3/02; H03H9/02; H03H9/13
Domestic Patent References:
| JP62193318U | ||||
| JP62241417A |
Attorney, Agent or Firm:
Hitoshi Maeda
Shingo Nishide
Shingo Nishide