Patent ID: 11869840
Assignee: INFINEON TECHNOLOGIES AG
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 20:
21. A power semiconductor device, comprising:
a semiconductor substrate comprising a wide bandgap semiconductor material;
an insulation layer above the first surface of the semiconductor substrate, the insulation layer comprising at least one opening extending through the insulation layer in a vertical direction;
a contact layer located on the silicon carbide substrate, arranged within the opening, and forming an ohmic connection to the semiconductor substrate;
a barrier layer structure disposed on the contact layer, and arranged within the opening; and
a front metallization above the insulation layer and being electrically conductively connected to the semiconductor substrate via the contact layer and the barrier layer structure arranged within the opening,
wherein the front metallization comprises at least one layer that is a metal or a metal alloy having a higher melting temperature than an intrinsic temperature of the wide bandgap semiconductor material of the semiconductor substrate, and
wherein the front metallization is configured as a contact pad of the semiconductor device.