Patent ID: 6024802
Filing Date: 2000-02-15
Classification: H01L,Y10S

Abstract:
A processing method for reducing oxide depletion, comprising the steps of:placing a polymer-coated wafer into a vapor process chamber;a pre-processing step of passing an inert gas into the vapor process chamber;holding the wafer in an idle state for an idling time, the idling time being about 42 seconds;a clearing step of passing a reactive gas carried by an inert gas carrier into the vapor process chamber so that the reactive gas reacts with material on the wafer and removes the polymeric material;a post-processing step of passing an inert gas into the vapor process chamber to purge any unreacted reactive gas;after the post-processing step, immediately transferring the wafer from the vapor process chamber into a dry task chamber, where the wafer is cleaned and dried; anda cleaning step of removing any residual reactive gas remaining on the wafer surface, wherein the time spent in the dry task chamber is slightly shorter than the time spent in the vapor process chamber.