| 发明名称 |
Quartz crystal unit, quartz crystal oscillator and electronic apparatus |
| 摘要 |
A quartz crystal unit comprises a quartz crystal resonator having an overall length less than 2.1 mm, a base portion, and first and second vibrational arms connected to the base portion. At least one groove is formed in at least one of opposite main surfaces of each of the first and second vibrational arms so that a width of the at least one groove formed in the at least one of the opposite main surfaces of each of the first and second vibrational arms is less than a spaced-apart distance between the first and second vibrational arms. The quartz crystal resonator is housed in a case, and a lid being connected to the case to cover an open end of the case. |
| 申请公布号 |
US8749124(B2) |
申请公布日期 |
2014.06.10 |
| 申请号 |
US201313743467 |
申请日期 |
2013.01.17 |
| 申请人 |
Piedek Technical Laboratory |
发明人 |
Kawashima Hirofumi |
| 分类号 |
H01L41/08 |
主分类号 |
H01L41/08 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A quartz crystal unit comprising:
a case; a quartz crystal resonator having an overall length less than 2.1 mm, a base portion, and first and second vibrational arms connected to the base portion; and a lid for covering an open end of the case, each of the first and second vibrational arms having opposite main surfaces; wherein at least one groove is formed in at least one of the opposite main surfaces of each of the first and second vibrational arms so that a width of the at least one groove formed in the at least one of the opposite main surfaces of each of the first and second vibrational arms is less than a spaced-apart distance between the first and second vibrational arms; wherein the quartz crystal resonator is housed in the case; and wherein the lid is connected to the case to cover the open end of the case.
|
| 地址 |
JP |
