Patent ID: 11952263
Assignee: ROBERT BOSCH GMBH
Field: Micro-structural and nano-technology (Chemistry)
Classification: CPC B | IPC B

Claim 4:
5. The micromechanical sensor device as recited in claim 1, wherein the cap substrate is an SOI substrate including a first silicon layer situated on the first front side, a second silicon layer situated on the first back side, and an insulating layer situated between the first silicon layer and the second silicon layer, and the through-opening extends through at least a part of the first silicon layer and at least a part of the second silicon layer and annularly widens in a radial direction to form a stepped cross-section that is wider in the first silicon layer than in the second silicon layer, the through-opening therefore having a wide section and a narrow section, at least a portion of the exterior surface of the sensor region interfacing with the wide section and facing the narrow section, with the wide section being arranged between the sensor region and the narrow section.