Anticorrosive vacuum sensor
First Claim
1. An anticorrosive capacitive vacuum sensor manufactured by the micromachining technique, comprising:
- an anticorrosive elastic diaphragm electrode operable to elastically deflect in response to a change in the pressure of a gas applied against said anticorrosive elastic diaphragm electrode, said anticorrosive elastic diaphragm electrode being formed of a chemically stabilized material other than monocrystalline silicon; and
a rigid fixed electrode arranged to face said anticorrosive elastic diaphragm electrode, said anticorrosive elastic diaphragm electrode and said rigid fixed electrode defining a closed space therebetween and being arranged such that a change in the capacitance between said anticorrosive elastic diaphragm electrode and said rigid fixed electrode occurs in response to the deflection of said anticorrosive elastic diaphragm electrode for measuring the pressure of the gas.
0 Assignments
0 Petitions
Accused Products
Abstract
A capacitive vacuum sensor includes an elastic diaphragm electrode and a rigid fixed electrode opposite the elastic diaphragm electrode. An internal space is defined between the elastic diaphragm electrode and the rigid fixed electrode. The elastic diaphragm electrode deflects elastically in response to any change in the pressure of a gas applied on the elastic diaphragm electrode, and the capacitive vacuum sensor is responsive to any change in the capacitance between the elastic diaphragm electrode and the rigid fixed electrode that may occur in accordance with the deflection of the elastic diaphragm electrode so that it can measure the pressure of the gas. The vacuum sensor can include an anticorrosive diaphragm electrode that can resist the corrosive action of the reactive gas when it is exposed to such gas, and can be fabricated by the micromachining technology.
8 Citations
14 Claims
-
1. An anticorrosive capacitive vacuum sensor manufactured by the micromachining technique, comprising:
-
an anticorrosive elastic diaphragm electrode operable to elastically deflect in response to a change in the pressure of a gas applied against said anticorrosive elastic diaphragm electrode, said anticorrosive elastic diaphragm electrode being formed of a chemically stabilized material other than monocrystalline silicon; and
a rigid fixed electrode arranged to face said anticorrosive elastic diaphragm electrode, said anticorrosive elastic diaphragm electrode and said rigid fixed electrode defining a closed space therebetween and being arranged such that a change in the capacitance between said anticorrosive elastic diaphragm electrode and said rigid fixed electrode occurs in response to the deflection of said anticorrosive elastic diaphragm electrode for measuring the pressure of the gas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification