Patent ID: 8991332
Filing Date: 2015-03-31
Classification: C23C,H01L

Abstract:
1. A film formation system comprising: a chamber wall defining an inner volume of a chamber to accept a substrate on which a film is to be formed; a first cooling system to cool only a first portion of the chamber wall, the first portion of the chamber wall above the inner volume; a first regulator to control cooling power of the first cooling system; a first lamp to heat the first portion of the chamber wall; a second cooling system to cool only a second portion of the chamber wall, the second portion of the chamber wall below the inner volume; a second regulator to control cooling power of the second cooling system; a second lamp to heat the second portion of the chamber wall; an entry port to permit gas to enter the chamber to form the film on the substrate; a controller containing an input for flow rate of the gas, the controller controlling the first regulator and the second regulator, the controller comprising: a memory to store the gas flow rate, a first temperature parameter defining a desired target temperature trajectory of the first portion of the chamber wall over a processing period and a second temperature parameter defining a desired target temperature trajectory of the second portion of the chamber wall over the processing period, the processing period including a film formation step, the target temperature trajectory being a non-constant value over the processing period; a user input/output system to enter the first temperature parameter; and a first output to control the first regulator to control the temperature of the first portion of the chamber walls during the processing period and a second output to control the second regulator to control the temperature of the second portion of the chamber walls during the processing period so that the temperature tracks the target temperature trajectory during film formation; and a processing circuit to send first signals to the first output and second signals to the second output over the processing period according to the first temperature parameter and to enhance growth rate of the film, the controller controlling an irradiancy bias between the first lamp and the second lamp to selectively heat the first wall relative to the second wall.