PIEZOELECTRIC VIBRATOR, ELECTRONIC DEVICE AND MOVING BODY

PROBLEM TO BE SOLVED: To provide a piezoelectric vibrator which can be expected to offer an energy trap effect higher than that achieved by conventional one.SOLUTION: A quartz vibrator 1 comprises: a quartz crystal substrate 14 having a first principal face 11 and a second principal face 12, which are in such a relation that they form a pair of front and rear sides respectively, and a connection part 13 connecting between the first principal face 11 and the second principal face 12; excitation electrodes 15, 16 provided on the first principal face 11 and the second principal face 12; and a plurality of convex parts 17 provided in the connection part 13 between the excitation electrode 16 and an outer edge 14a of the quartz crystal substrate 14. The plurality of convex parts 17 protrude on the side of at least one principal face (herein, the second principal face 12) of the first principal face 11 and the second principal face 12. The convex part 17 closer to the outer edge 14a has an apex portion 17a closer to the other principal face (herein, the first principal face 11) on a side opposite to the protruding side. In the plurality of convex parts 17, the bottom part 17b connecting adjacent convex parts 17, which is located closer to the outer edge 14a is arranged to be closer to the other principal face (herein, the first principal face 11).SELECTED DRAWING: Figure 2 【課題】従来よりも高いエネルギー閉じ込め効果が期待できる圧電振動子の提供。【解決手段】水晶振動子１は、第１主面１１、第１主面１１と表裏の関係にある第２主面１２、第１主面１１と第２主面１２とを接続する接続部１３、を有する水晶基板１４と、第１主面１１及び第２主面１２に設けられている励振電極１５，１６と、接続部１３の、励振電極１６から水晶基板１４の外縁１４ａまでの間に設けられている複数の凸部１７と、を備え、複数の凸部１７は、第１主面１１及び第２主面１２の少なくとも一方の主面（ここでは、第２主面１２）側に突出し、複数の凸部１７の各頂部１７ａは、外縁１４ａに近いほど、突出側とは反対側の他方の主面（ここでは、第１主面１１）に近くなり、複数の凸部１７の、隣り合う凸部１７同士をつなぐ各低部１７ｂは、外縁１４ａに近いほど、他方の主面（第１主面１１）に近くなっている。【選択図】図２