Patent ID: 7419702
Filing Date: 2008-09-02
Classification: C23C

Abstract:
1. A method of processing a substrate on a ceramic substrate heater in a process chamber, the method comprising: forming a sacrificial protective coating on the ceramic substrate heater in the process chamber prior to placing a substrate on the substrate heater, including: wherein the sacrificial protective coating comprises a non-metal layer surface portion for receiving a substrate, and wherein the non-metal layer surface portion includes a first surface portion for receiving a substrate and a second surface portion that remains exposed when the first surface portion receives a substrate; (c) placing the at least one substrate on the first surface portion of the non-metal layer surface portion and thereafter subjecting the substrate to a process during which additional metal is deposited on the second surface portion: (d) removing the processed substrate from the process chamber and again exposing the coated ceramic substrate heater to the at least one non-metal-containing gas to deposit additional non-metal to cover the additional metal; (e) repeating (c) and (d) until a desired number of substrates have been processed; and (f) stripping the sacrificial protective coating and additional metal and non-metal deposits from the ceramic substrate heater.