SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME FOR RESTRAINING IMPURITIES FROM OUT-DIFFUSING

摘要

PURPOSE: A semiconductor device and a method of manufacturing the same are provided to restrain impurities from out-diffusing by distributing non-uniformly the impurities over an isolation layer. CONSTITUTION: A semiconductor device includes an isolation layer filled in a groove of a substrate. The isolation layer contains predetermined impurities. The concentration of the impurities is gradually decreased from bottom to top in the isolation layer, so that out-diffusion of the impurities is restrained.