Patent ID: 6797575
Filing Date: 2004-09-28
Classification: H01L

Abstract:
A method for forming a polycide structure comprising:loading a semiconductor substrate into a first deposition chamber to form a polysilicon film doped with impurities on the semiconductor substrate; moving the semiconductor substrate formed with the polysilicon film into a second deposition chamber and introducing silane gas into the second deposition chamber to form a deposition atmosphere and to form a seed film containing an amorphous silicon for being reacted with tungsten; supplying a mixed gas including silane gas and WF6 gas into the second deposition chamber thereby depositing a tungsten silicide precursor layer on the seed film; forming a polycide pattern by sequentially etching the tungsten silicide layer, seed film and a predetermined portion of the polysilicon film; and converting the tungsten silicide precursor layer into tungsten silicide by heat-treating the semiconductor substrate including the polycide pattern in an oxidation atmosphere.