| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the temperature characteristics by suppressing variation in the frequency or the CI value for the temperature variation. <P>SOLUTION: A crystal vibration piece 2 operates in the thickness-shear vibration and is provided, at one end 26 of one principal surface 22 of a substrate 21, with a bonding part 28 being bonded to the electrode pad 67 of a base 6. A first mesa 31 having a first excitation electrode 41 formed thereon is also formed on the one principal surface 22 of the substrate 21, and a second mesa 32 having a second excitation electrode 42 formed thereon is formed on the other principal surface 23 of the substrate 21. The first mesa 31 and the second mesa 32 are not in correspondence with each other and have different shapes, whereas the first excitation electrode 41 and the second excitation electrode 42 are in correspondence with each other and have the same shape. <P>COPYRIGHT: (C)2013,JPO&INPIT |
