Patent ID: 9355783
Filing Date: 2016-05-31
CPC Classification: H01G

Claim Text:
1. A variable capacitance device comprising: a substrate; a beam connected to the substrate at a connection end of the beam; a drive capacitance generating portion provided on the substrate and the beam and arranged to deform the beam in accordance with an electrostatic force caused by a capacitance generated by application of a DC voltage; and a signal capacitance generating portion including: the signal capacitance generating portion is provided separately from the drive capacitance generating portion; the drive capacitance generating portion provided on the substrate and the first and second substrate side signal electrode portions are arranged such that longitudinal dimensions of each of the drive capacitance generating portion and the first and second substrate side signal electrode portions extend in a longitudinal axis direction of the beam; and the beam is made of a conductive material and a signal cutting off element is connected to the drive capacitance generating portion.