Patent ID: 11967616
Assignee: HITACHI ENERGY LTD
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A vertical silicon carbide power MOSFET, comprising:
a drain formed by a 4H-SiC substrate with n+ type doping;
a drift region comprising a 4H-SiC epilayer with n− type doping, the 4H-SiC epilayer being epitaxially grown on the 4H-SiC substrate;
a source region with p++ type doping disposed in the drift region;
a well region with p type doping disposed into the drift region;
a channel region with p type doping disposed into the drift region;
a contact region with n++ type doping disposed into the drift region;
a metal gate insulated from the source region and the drift region by a gate-oxide; and
a high mobility layer comprising a 3C-SiC epilayer, the high mobility layer located at an interface between the 4H-SiC epilayer and the gate-oxide and having a vertical thickness between 0.1 nm to 50 nm.