Patent ID: 8742456

Claim:
A structure comprising a thyristor and a high-current anti-parallel diode on a single semiconductor die, comprising: a heavily-doped first-conductivity-type region at a front surface of the semiconductor die, both in a thyristor location and also in a diode location; at least one first trench, containing a first gate electrode, in the thyristor location; at least one second trench, containing a second gate electrode, in the diode location, the second gate electrode not being electrically connected to the first gate electrode; a second-conductivity-type base region, in said thyristor location but not in said diode location, which forms a junction with underlying first-conductivity-type semiconductor material at a depth which is deeper than said at least one first trench; a second-conductivity-type body region, in at least said diode location, which forms a junction with said underlying first-conductivity-type semiconductor material at a depth which is not deeper than a bottom of said at least one second trench; a heavily-doped first-conductivity-type backside contact region beneath said diode location; a heavily-doped second-conductivity-type backside contact region beneath said thyristor location; a first metallic layer electrically connected to said heavily-doped first-conductivity-type region in both the thyristor location and diode location and connected to the second-conductivity-type body region in the diode location; and a second metallic layer electrically connected to both said heavily-doped first-conductivity-type backside contact region and to said heavily-doped second-conductivity-type backside contact region.