- 专利标题: Quartz crystal resonator, quartz crystal unit, and quartz crystal oscillator
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申请号: US16265444申请日: 2019-02-01
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公开(公告)号: US11563406B2公开(公告)日: 2023-01-24
- 发明人: Hirofumi Kawashima
- 申请人: PIEDEK TECHNICAL LABORATORY
- 申请人地址: JP Tokyo
- 专利权人: PIEDEK TECHNICAL LABORATORY
- 当前专利权人: PIEDEK TECHNICAL LABORATORY
- 当前专利权人地址: JP Tokyo
- 代理机构: Adams & Wilks
- 优先权: JP2003-205844 20030630,JP2003-436310 20031205
- 主分类号: H03B5/30
- IPC分类号: H03B5/30 ; H03B1/04 ; G04B17/00 ; H01L41/08 ; H01L41/053 ; H03H9/215 ; H03H9/10 ; H03H9/05 ; H03H9/02 ; H03B5/36 ; G01C19/5607 ; H03H9/24 ; H03H9/19
摘要:
A quartz crystal unit comprising a quartz crystal resonator having a base portion, and first and second tuning fork arms connected to the base portion, the base portion having a length less than 0.5 mm and greater than a spaced-apart distance between the first and second tuning fork arms, each of the first and second tuning fork arms having a width less than 0.1 mm and a length less than 1.56 mm, and a plurality of different widths including a first width and a second width greater than the first width, at least one groove being formed in at least one of opposite main surfaces of each of the first and second tuning fork arms so that a length of the at least one groove is within a range of 0.3 mm to 0.79 mm, the quartz crystal resonator being housed in a case, and a lid being connected to the case.