Patent ID: 9147732
Filing Date: 2015-09-29
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; at least one semiconducting layer comprising a nitride of a group 13 element on said substrate; and an ohmic contact on the at least one semiconducting layer, said ohmic contact comprising a silicon-comprising portion on the at least one semiconducting layer and a metal portion adjacent to and extending over said silicon-comprising portion, the metal portion comprising titanium and a further metal, wherein the ohmic contact does not contain gold, wherein the metal portion comprises a titanium layer, a layer of the further metal over the titanium layer, and a capping layer made of a material containing titanium for protecting the layer of the further metal, wherein the silicon-comprising portion comprises a first silicon-comprising portion and a second silicon-comprising portion laterally separated from the first silicon-comprising portion, wherein a part of the metal portion extends between the first silicon-comprising portion and the second silicon-comprising portion, and wherein the metal portion completely envelopes the first silicon-comprising portion and the second silicon-comprising portion.