Patent ID: 6537884
Filing Date: 2003-03-25
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising;forming an oxide film and a polysilicon layer on a silicon substrate, and patterning the polysilicon layer to form a gate portion; forming a first insulating film on a sidewall of the gate portion to form a first spacer; depositing a second insulating film over the silicon substrate; disposing a mask layer on the second insulating film to mask a portion of the gate portion and an offset region defined between the gate portion and a predetermined portion where a drain is to be formed; patterning the second insulating film using the mask layer as a mask to form a second spacer, said second spacer being wider than the first spacer; implanting impurities to the silicon substrate by using the gate portion and the first and second spacers as a mask to form a source and a drain; depositing metal on an entire surface of the silicon substrate with the second spacer disposed on the portion of the gate portion and the offset region, said portion of the gate portion and the offset region being free from the deposited metal; changing the disposed metal to silicide by annealing the silicon substrate; and removing the metal that is not changed to silicide by etching the entire surface of the silicon substrate.