Patent ID: 11905166
Assignee: ROBERT BOSCH GMBH
Field: Micro-structural and nano-technology (Chemistry)
Classification: CPC B  G  H | IPC B  H

Claim 2:
3. A micromechanical component for a sensor or microphone device, comprising:
a monocrystalline substrate made of at least one semiconductor material, a plurality of first trenches being patterned through a substrate surface of the monocrystalline substrate, wherein the plurality of first trenches open into at least one first cavity etched into the monocrystalline substrate;
a monocrystalline sealing layer that (a) is epitaxially grown on the substrate surface of the monocrystalline substrate, (b) is made of at least one identical semiconductor material as the monocrystalline substrate, and (c) covers the plurality of first trenches; and
at least one semiconductor and/or metal layer and/or at least one insulating layer, formed as a layer stack on a side of the monocrystalline sealing layer facing away from the at least one first cavity, the at least one semiconductor and/or metal layer and/or the at least one insulating layer surrounding at least one second cavity;
wherein a partial area, adjoining the at least one second cavity, of an outermost silicon layer of the layer stack is developed as a deformable diaphragm, and at least one connecting channel is formed, by which the at least one first cavity formed within the monocrystalline substrate is connected to the at least one second cavity embedded in the layer stack.