Patent ID: 6268298
Filing Date: 2001-07-31
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising the steps of:implanting ions into a silicon substrate; andoxidizing said ion-implanted silicon substrate to form a field oxide film and a channel-stopper region disposed under said field oxide film simultaneously, said channel-stopper region being formed by diffusing said implanted ions, wherein said oxidizing step includes performing, in numerical order, the steps of:1) loading into a thermal oxidation furnace said ion-implanted silicon substrate;2) ramping a furnace temperature up to a first constant annealing temperature while supplying an oxygen-deficient gas into said furnace, an oxygen concentration with respect to an inert gas being controlled to be 5% or less;3) performing a first annealing on said silicon substrate at said first constant annealing temperature while supplying an oxygen-deficient gas into said furnace, an oxygen concentration with respect to an inert gas being controlled to be 2% or less;4) performing a second annealing on said silicon substrate at a second constant annealing temperature while supplying an oxidizing gas into said furnace; and5) ramping said furnace temperature down and unloading said silicon substrate.