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

Claim 0:
1. A Merged-PiN-Schottky (MPS) device, comprising:
a substrate of silicon carbide having a first conductivity;
a drift layer of silicon carbide having the first conductivity, extending on the substrate;
a first implanted region having a second conductivity opposite to the first conductivity and extending in the drift layer, the first implanted region having a first dimension in a first direction;
a second implanted region having the second conductivity and extending in the drift layer, the second implanted region having a second dimension in the first direction, the second implanted region being spaced from the first implanted region by a third dimension in the first direction, the third dimension being less than both the first and the second dimension;
a first ohmic contact in the first implanted region, the first ohmic contact having a fourth dimension in the first direction, the fourth dimension being less than the first dimension;
a second ohmic contact in the second implanted region, the second ohmic contact having a fifth dimension in the first direction, the fifth dimension being less than the second dimension;
a first junction-barrier (JB) diode at a first surface of the drift layer and the first implanted region;
a second junction-barrier (JB) diode at the first surface of the drift layer and the second implanted region; and
a first electrical terminal in ohmic contact with the first surface of the drift layer at the first implanted region and the second implanted region, the first electrical terminal having a fifth dimension in the first direction that is greater than a sum of the first, second, and third dimensions; and
a first Schottky diode at the drift layer between the first and second implanted regions, wherein the drift layer has a 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.