Patent ID: 11869771
Assignee: STMICROELECTRONICS S.R.L.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A device, comprising:
a semiconductor body including silicon carbide (SiC); and
a passivation layer extending over a first surface of the semiconductor body and having a first anchorage element protruding into a first cavity in the semiconductor body at the first surface, the first anchorage element fixes the passivation layer to the semiconductor body, the first anchorage element anchors the passivation layer to the semiconductor body, the first anchorage element comprising:
a first portion including a plurality of steps, the first portion being in the semiconductor body at a first distance from the first surface in a first direction transverse to the first surface, and the first portion having a first maximum dimension in a second direction transverse to the first direction; and
a second portion being aligned with the first portion, overlapping the first portion, extending in the semiconductor body from the first surface to the first portion, and having a second maximum dimension in the second direction and smaller than the first maximum dimension, the second portion being closer to the first surface than the first portion, wherein:
the plurality of steps of the first portion further includes:
a first step having the first maximum dimension; and
a second step between the first step and the second portion, the second step having a third maximum dimension extending in the second direction, the third dimension being less than the first maximum dimension and greater than the second maximum dimension.