专利检索 ap:("NIHON DEMPA KOGYO CO., LTD.") AND inv:"Takayuki Kuwahara" 第 1 页

1.

发明授权
At-cut crystal element, crystal resonator and crystal unit 有权

公开(公告)号：US10659005B2

公开(公告)日：2020-05-19

申请号：US15086064

申请日：2016-03-31

申请人： NIHON DEMPA KOGYO CO., LTD.

发明人： Takayuki Kuwahara , Kenji Shimao , Hirokazu Iwata

IPC分类号： H03H9/19 , H03H3/02 , H03H9/02

摘要： An AT-cut crystal element is provided. The AT-cut crystal element includes side surfaces intersecting with a Z′-axis of a crystallographic axis of a crystal. At least one side surface of the side surfaces is constituted of three surfaces of a first surface to a third surface. Besides, a crystal resonator including the AT-cut crystal element, and a crystal unit including the crystal resonator are provided.