Patent ID: 11945712
Assignee: STMICROELECTRONICS S.R.L.
Field: Micro-structural and nano-technology (Chemistry)
Classification: CPC B | IPC B

Claim 11:
12. A MEMS device, comprising:
a substrate;
an insulating layer on the substrate;
one or more conductive regions on the insulating layer;
a first structural layer of semiconductor material on the insulating layer and on the one or more conductive regions;
a plurality of first electrodes in the first structural layer;
a second structural layer of semiconductor material on the first structural layer and spaced from the substrate by the first structural layer;
a plurality of second electrodes extending through the second structural layer; and
a plurality of trenches extending through the first and the second structural layers; and
a stopper structure including:
an abutment pillar of the first structural layer, the abutment pillar being coupled to a respective conductive region of the one or more conductive regions; and
a wall of the first structural layer and of the second structural layer, the wall including:
a portion coupled to the insulating layer that extends from the insulating layer in a first direction; and
a projecting arm that extends from the portion in a second direction transverse to the portion, the projecting arm overlaps the abutment pillar and is spaced apart from the abutment pillar by a gap and at least one respective first trench of the plurality of first trenches.