Patent ID: 9368650
Filing Date: 2016-06-14
CPC Classification: H01L

Claim Text:
1. A SiC junction barrier controlled Schottky (JBS) rectifier, comprising: a heavily doped n-type SiC substrate, comprising a first surface and a second surface opposite to the first surface; an n-type drift layer, disposed at the first surface, comprising a third surface away from the first surface; a p-type doping region, disposed in the n-type drift layer, being in contact with the third surface; a plurality of junction field-effect regions, disposed in then-type drift layer, surrounded by the p-type doping region, and being in contact with the third surface, each comprising N circular regions and (N−1) inter-circle regions each connecting two of the circular regions, N being a natural number; a first metal layer, disposed at the third surface, a Schottky barrier is formed between the first metal layer and the junction field-effects regions; a second metal layer, disposed at the second surface, an Ohmic contact is formed between the second metal layer and the SiC substrate; and a plurality of third metal layers, disposed at the third surface and arranged between the p-type doping region and the first metal layer, an Ohmic contact is formed between the third metal layers and the p-type doping region.