Patent ID: 9190290
Filing Date: 2015-11-17
Classification: H01J,H01L

Abstract:
1. A method of etching a substrate, the method comprising: treating the substrate with a local plasma formed from an inert gas, wherein treating the substrate comprises transitioning a crystalline silicon portion of the substrate into an amorphous silicon portion of the substrate and wherein the local plasma is formed by applying a local plasma power to excite the local plasma; and etching the amorphous silicon portion of the substrate, wherein etching the amorphous silicon portion of the substrate comprises flowing plasma effluents into a substrate processing region housing the substrate after treating the substrate, wherein the plasma effluents are formed by flowing a hydrogen-containing precursor into a remote plasma region fluidly coupled to the substrate processing region while forming a remote plasma in the remote plasma region to produce the plasma effluents, wherein forming the remote plasma in the remote plasma region to produce the plasma effluents comprises applying a remote RF plasma having a remote RF plasma power to the remote plasma region.