Patent ID: 9070777
Filing Date: 2015-06-30
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; a semiconductor layer disposed on the substrate; a barrier layer disposed on the semiconductor layer; and an insulating layer disposed on the barrier layer, wherein the semiconductor layer includes an oxide semiconductor including at least one of indium, tin, and zinc, wherein the barrier layer includes a first oxide including at least one of indium, tin and zinc and a second oxide including another material including at least one of a lower standard electrode potential than a semiconductor material of the oxide semiconductor, a lower electron affinity than the semiconductor material of the oxide semiconductor, or a larger band gap than the semiconductor material of the oxide semiconductor, wherein the insulating layer includes at least one of a silicon-based oxide or a silicon-based nitride, wherein the insulating layer includes a portion which contacts with an upper surface of the barrier layer, wherein the barrier layer is formed of one layer with the second oxide added in the first oxide, wherein the barrier layer contacts the semiconductor layer, wherein the second oxide of the barrier layer includes at least one selected from a group including, gallium, yttrium, niobium, magnesium, hafnium, titanium, lanthanum, lithium, scandium, barium, strontium, or zirconium, and wherein the second oxide has a higher combination force with oxygen than the oxide semiconductor of the semiconductor layer.