Patent ID: 7786578

Claim:
An electrical contact structure comprising: a Si-containing material having a first conductivity type dopant region and a second conductivity type dopant region that are spaced apart from each other, said dopant regions having different dopant concentrations; and a plurality of substantially non-agglomerated Ni alloy monosilicide contacts located on a portion of said Si-containing material over said dopant regions, each substantially non-agglomerated Ni alloy monosilicide contact having a thickness of less than 30 nm, a resistivity from 15 to 40 micro-ohm-cm, and an interface roughness that provides a thickness variation that is less than about 10%, and where said plurality of substantially non-agglomerated Ni alloy monosilicide contacts comprises about 8 atomic percent or greater of one or more alloying additives, said amount is sufficient to permit an amorphous structure to form during fabrication of each of said substantially non-agglomerated Ni alloy contacts, said amorphous structure eliminates formation of metal-rich silicides.