Patent ID: 6197373
Filing Date: 2001-03-06
Classification: C23C,C30B

Abstract:
A method for injecting a gas into a low pressure chemical vapor deposition (LPCVD) furnace, wherein said LPCVD furnace includes a quartz tube having an interior chamber that includes a lower portion and an upper portion, the method comprising the steps of:providing a gas injection tube that enters the LPCVD furnace at the lower portion of the interior chamber and extends toward the upper portion of the interior chamber;providing a pedestal positioned at the lower portion of the interior chamber and configured to receive the gas injection tube;placing a plurality of wafers in the LPCVD furnace;heating the LPCVD furnace; andinjecting the gas into the LPCVD furnace utilizing the gas injection tube such that the gas flows upwardly through the gas injection tube prior to injection into the interior chamber of the LPCVD furnace.