Patent ID: 6113698
Filing Date: 2000-09-05
Classification: C23C,H01L

Abstract:
A degassing apparatus comprising:a vacuum chamber;a heated substrate support within said vacuum chamber for supporting an object to be degassed, the object comprising a frontside and a backside wherein the backside faces said heated substrate support;a frontside gas inlet coupled in fluid communication with said vacuum chamber, for supplying a gas flux at a first rate to the frontside of the object; anda pump coupled in fluid communication with the vacuum chamber for pumping the gas flux at a second rate from the backside of the object, and for pumping the gas flux at a third rate from the frontside of the object, said heated substrate support comprising at least one passageway for allowing the gas flux to pass from the frontside to the backside of the object, wherein the first rate, the second rate, the third rate and the at least one passageway are for generating a greater pressure on the frontside of the object than the pressure on the backside of the object.