Patent ID: 11961904
Assignee: INFINEON TECHNOLOGIES AG
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A semiconductor device, comprising:
a trench gate structure extending from a first surface into a silicon carbide body and comprising a first sidewall and an opposite second sidewall;
a top shielding region extending along the second sidewall from the first surface into the silicon carbide body; and
a buried shielding region extending along a bottom area of the trench gate structure, wherein:
the buried shielding region and the top shielding region are connected; and
a lateral edge of the buried shielding region oriented to the top shielding region is at least one of below the trench gate structure or below the top shielding region,

wherein at least one of:
the bottom area of the trench gate structure comprises a local recess; or
in a horizontal plane at half of a vertical extension of the top shielding region, a dopant concentration in the top shielding region has a maximum at the second sidewall of the trench gate structure.