| 摘要 |
PURPOSE:To improve the temperature properties, by providing an overlapped part for control of frequency or frequency temperature properties at the places near the center part on the long side of an oscillating part and at least one area of four sides of the oscillating part. CONSTITUTION:A Y plate is turned by 49-56 deg. round an X axis and then + or -40- 50 deg. within a main plane to obtain a thin quartz plate. Then a GT-cut quartz oscillator having an oscillating part 4 and a supporting part 5 is produced from the thin quartz plate. A driving electrode 6 is provided nearly on the entire surface of the part 4, and the upper and lower electrodes are pulled out to the parts 5 opposite to each other. An overlapped part 7 for control frequency is set at the area near the center of the long side of the part 4, and at the same time an overlapped part 8 for control of frequency temperature properties is provided at the four corners of the part 4 respectively. The oscillation frequency of the short side, i.e. the main oscillation is controlled by varying the degree of elimination of parts 7 and 8. Thus the temperature properties can be improved. |
