Patent ID: 9166066
Filing Date: 2015-10-20
Classification: B81B,G01L,G01P,H01L

Abstract:
1. A method for producing a micromechanical sensor apparatus having a movable gate, comprising; forming a channel region and source/drain regions in or on a semiconductor substrate; forming a gate insulation layer on the channel region; forming a sacrificial layer on the gate insulation layer, which is selectively etchable with respect to the gate insulation layer; forming a gate electrode on the sacrificial layer; forming a dielectric insulation layer on the gate electrode; forming an access hole to the sacrificial layer in the dielectric insulation layer; and sacrificial layer etching the sacrificial layer through the access hole to form a field effect transistor having a movable gate, which is separated from the channel region by a cavity, wherein the channel region remains covered by the gate insulation layer.