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

Claim 8:
9. 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, and a second anchorage element protruding into a second cavity in the semiconductor body at the first surface, the first and second anchorage elements fix the passivation layer to the semiconductor body, wherein
the first anchorage element comprising:
a first portion 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 superimposed with 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; and

the second anchorage element comprising:
a third portion in the semiconductor body at a second distance from the first surface in the first direction, and the third portion having the first maximum dimension;
a fourth portion being superimposed with the third portion, extending in the semiconductor body from the first surface to the third portion, and the fourth portion having the second maximum dimension; and

the first anchorage element and the second anchorage element are spaced apart from one another at the first surface of the semiconductor body by a third distance in the second direction.