Patent ID: 11869944
Assignee: STMICROELECTRONICS S.R.L.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A method for manufacturing a Merged-PiN-Schottky (MPS) device, comprising:
forming, on a substrate of silicon carbide having a first conductivity, a drift layer of silicon carbide having the first conductivity;
forming a first junction-barrier, JB, diode with the substrate by forming, in the drift layer and at a first surface of the drift layer, a first implanted region having a second conductivity opposite to the first conductivity; and
forming a first Schottky diode with the drift layer by forming a first electrical terminal in ohmic contact with a first surface of the first implanted region, coplanar with the first surface of the drift layer, and also in direct electrical contact with the first surface of the drift layer laterally to the first implanted region,
the first JB diode and the first Schottky diode being alternated to each other, at the first electrical terminal, along a first axis so that the first JB diode has, at the first surface of the first implanted region, a first width which is parallel to the first axis, and the first Schottky diode has, at the first surface of the drift layer, a second width which is parallel to the first axis, the second width is smaller than, or equal to, the first width, and
the drift layer having an dopant concentration such that a breakdown voltage of the MPS device, beyond which a charge carrier multiplication phenomenon occurs, is greater than, or equal to, 115% of a maximum working voltage of the MPS device in an inhibition state.