发明名称 |
Pressure measuring instrument and substrate processing apparatus provided with the pressure measuring instrument |
摘要 |
There is provided a pressure measuring instrument including: a detecting unit including the reference pressure chamber therein and formed in a cylindrical shape, the diaphragm being disposed inside the detecting unit; a communicating unit for providing communication between the diaphragm and the measurement pressure chamber, and formed in a circular tube shape having an inner diameter smaller than an inner diameter of the detecting unit; and an annular flow-path forming unit disposed between the detecting unit and the communicating unit, and configured to form a substantially annular path. The communicating unit introduces a gas of the measurement pressure chamber into the substantially annular path. The annular flow-path forming unit allows the gas introduced from the communicating unit to pass through the substantially annular path and to supply the passing gas to a side surface of the diaphragm. |
申请公布号 |
US9360390(B2) |
申请公布日期 |
2016.06.07 |
申请号 |
US201414150457 |
申请日期 |
2014.01.08 |
申请人 |
TOKYO ELECTRON LIMITED |
发明人 |
Koike Satoru |
分类号 |
G01L9/00;G01L19/14;G01L19/06 |
主分类号 |
G01L9/00 |
代理机构 |
Nath, Goldberg & Meyer |
代理人 |
Nath, Goldberg & Meyer ;Meyer Jerald L. |
主权项 |
1. A pressure measuring instrument that, using a diaphragm disposed between a reference pressure chamber and a measurement pressure chamber, detects a deformation of the diaphragm and consequently measures a pressure of the measurement pressure chamber, the pressure measuring instrument comprising:
a detecting unit including the reference pressure chamber therein and formed in a cylindrical shape, the diaphragm being disposed inside the detecting unit; a communicating unit for providing communication between the diaphragm and the measurement pressure chamber, and formed in a circular tube shape having an inner diameter smaller than an inner diameter of the detecting unit; and an annular flow-path forming unit disposed between the detecting unit and the communicating unit, and configured to form a substantially annular path, wherein the communicating unit configured to introduce a gas of the measurement pressure chamber into the substantially annular path, the annular flow-path forming unit configured to allow the gas introduced from the communicating unit to pass through the substantially annular path and to supply the passing gas to a side surface of the diaphragm, and the substantially annular path is formed at a location opposite to a location at which a differential value dH of a displacement H per unit area of the diaphragm reaches a peak, while the substantially annular path being not formed at a location opposite to a location at which a differential value dH of a displacement H per unit area of the diaphragm is 0. |
地址 |
Tokyo JP |