Patent ID: 8163637
Filing Date: 2012-04-24
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device including a first conductive type semiconductor layer composed of silicon carbide, the first conductive type semiconductor layer having a second conductive type semiconductor region exposed at an upper surface of the first conductive type semiconductor layer, the method comprising steps of: forming a first layer on the upper surface of the first conductive type semiconductor layer, the first layer being made of Ni or an alloy including Ni; forming a second layer on the upper surface of the first layer, the second layer being made of silicon oxide; removing a part of the second layer, the part corresponding to a position of the second conductive type semiconductor region; after the removing step injecting second conductive type ion impurities through the removed part of the second layer, through a portion of the first layer that is below the removed part of the second layer, and into the first conductive type semiconductor layer, thus forming the second conductive type semiconductor region; and removing the first and second layers after the injecting step.