Patent ID: 9396995
Filing Date: 2016-07-19
CPC Classification: H01L

Claim Text:
1. A method comprising: forming a trench contact (TT) through an interlayer dielectric (ILD) down to a source/drain region; forming a silicon oxycarbide (SiOC), silicon carbon nitride (SiCN), or silicon oxynitride (SiON) layer on side surfaces of the TT; performing a gas cluster ion beam (GCIB) vertical etching at a 0° angle; implanting silicon (Si) into the TT by an angled pre-amorphous implantation (PAI); removing a portion of the TT by Ar sputtering and a remote plasma assisted dry etch process; forming nickel silicide (NiSi) on the source/drain (S/D) region at the bottom of the TT by: filling the TT with contact metal over the NiSi.