Patent ID: 9214388
Filing Date: 2015-12-15
Classification: H01L

Abstract:
1. A method of forming a bonded structure comprising: forming a first planar dielectric layer on a first substrate, wherein said first planar dielectric layer is formed as a contiguous blanket layer; forming material stacks of a first metal portion and a first semiconductor portion on a top surface of said first planar dielectric layer, wherein said first metal portion is formed from a first metal layer, and said first semiconductor portion is formed from a first semiconductor layer stacked on said first metal layer; forming first dielectric material portions directly on an exposed portion of said top surface of said first planar dielectric layer; forming a second planar dielectric layer on a second substrate, wherein said second planar dielectric layer is formed as a contiguous blanket layer; forming metal-containing material portions including at least a second metal portion on a topmost surface of said second planar dielectric layer; forming second dielectric material portions directly on an exposed portion of said top surface of said second planar dielectric layer; and bringing said material stacks and said metal-containing material portions into physical contact at an interface plane and annealing said first and second substrates, whereby metal semiconductor alloy portions are foinied across said interface plane by conversion of materials of said material stacks and said metal-containing material portions into a metal semiconductor alloy.