Patent ID: 9284642
Filing Date: 2016-03-15
CPC Classification: C23C,H01L

Claim Text:
1. A method for forming an oxide film by plasma-assisted processing, comprising: (i) supplying a precursor reactive to none of oxygen, C (ii) exposing the precursor and the substrate to a plasma of C (iii) forming an oxide film on the substrate using the precursor and the plasma, wherein the plasma-assisted processing is plasma-enhanced atomic layer deposition (PEALD), wherein step (i) comprises (ia) supplying the precursor in the reaction space to adsorb the precursor on the substrate, followed by purging to remove a non-adsorbed precursor from the substrate, step (ii) comprises (iia) exposing the adsorbed precursor to the plasma to cause surface reaction to the adsorbed precursor, followed by purging to remove a non-reacted component from the substrate, and steps (ia) and (iia) constitute one cycle and are repeated to form the oxide film in step (iii), wherein the purging in step (ia) is stopped before removing most of the non-adsorbed precursor to the extent that the non-adsorbed, non-removed precursor reacts with the plasma in a gas phase.