Patent ID: 7671471
Filing Date: 2010-03-02
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; a dielectric layer above said substrate, wherein said dielectric layer comprises a trench, and wherein the bottom of said trench has a first portion and a second portion; a first metal layer, wherein said first metal layer is above said first portion of the bottom of said trench but not above said second portion; and a second metal layer, wherein said second metal layer is above said second portion of the bottom of said trench and above said first metal layer, and wherein said first metal layer and said second metal layer form a P/N junction at the bottom of said trench, wherein said first metal layer comprises a material that is selected from the group consisting of ruthenium, palladium, platinum, cobalt, nickel, and a conductive metal oxide and said second metal layer comprises a material that is selected from the group consisting of hafnium, zirconium, titanium, tantalum, aluminum, and a metal carbide.