Patent ID: 9472416
Filing Date: 2016-10-18
CPC Classification: H01L

Claim Text:
1. A method of processing a substrate disposed atop a substrate support in a processing volume of a processing chamber, the method comprising: generating an ion species from an inductively coupled plasma formed within the processing volume of the processing chamber from a first process gas, wherein the inductively coupled plasma is formed in the same processing volume as the substrate without a chamber component disposed between the inductively coupled plasma and the substrate, wherein the inductively coupled plasma is formed by providing radio frequency (RF) power to ignite the first process gas, and wherein the RF power is pulsed to pulse the plasma; exposing a first layer of the substrate to the ion species to form an ammonium fluoride (NH heating the substrate to a second temperature at which the ammonium fluoride film reacts with the first layer to selectively etch the silicon oxide.