Patent ID: 8766346
Filing Date: 2014-07-01
Classification: H01L

Abstract:
1. A semiconductor layer stack comprising: a first layer formed on a substrate, wherein the first layer comprises one of a metal, a metal alloy, a conductive metal oxide, a conductive metal nitride, a conductive metal silicide, or a conductive metal carbide; a second layer formed above the first layer, wherein the second layer is operable as a first oxygen donor layer, wherein the second layer comprises one of chromium oxide, cerium oxide, europium oxide, manganese oxide, molybdenum oxide, niobium oxide, tin oxide, tungsten oxide, vanadium oxide, or combinations thereof; a third layer formed above the second layer; a fourth layer formed above the third layer, wherein the fourth layer is operable as a second oxygen donor layer, wherein the fourth layer comprises one of chromium oxide, cerium oxide, europium oxide, manganese oxide, molybdenum oxide, niobium oxide, tin oxide, tungsten oxide, vanadium oxide, or combinations thereof; and a fifth layer formed above the fourth layer, wherein the fifth layer comprises one of a metal, a metal alloy, a conductive metal oxide, a conductive metal nitride, a conductive metal silicide, or a conductive metal carbide; wherein the second layer and the fourth layer each have a Gibb's free energy that is higher than a material included in the third layer.