Patent ID: 6613625
Filing Date: 2003-09-02
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising:forming an element isolation insulating film on a semiconductor substrate by thermal oxidation; forming a gate insulating film on the semiconductor substrate by thermal oxidation; depositing a first polycrystalline silicon film at a thickness of 500 angstroms to 2500 angstroms on the gate isulating film; doping the first polycrystalline silicon film with an impurity such that a concentration of the impurity is 1Ã—1018 atoms/cm3 or higher to make a conductivity type of the first polycrystalline silicon film a P-type; depositing a high melting point metallic silicide film having a thickness of 500 angstroms to 2500 angstroms on the first polycrystalline silicon film having the P-type; depositing an insulating film having a thickness of 500 angstroms to 3000 angstroms on the high melting point metallic silicide film; etching the first polycrystalline silicon film having the P-type, the high melting point metallic silicide film, and the insulating film to form a gate electrode; depositing a second polycrystalline silicon film having a thickness of 500 angstroms to 2500 angstroms on the element isolation insulating film; doping one of an entire region and a first region of the second polycrystalline silicon film with a first conductivity type impurity at a concentration of 1Ã—1014 atoms/cm3 to 9Ã—1018 atoms/cm3; doping a second region of the second polycrystalline silicon film with a second conductivity type impurity at a concentration of 1Ã—1014 atoms/cm3 to 9Ã—1018 atoms/cm3; etching the second polycrystalline silicon film to form a resistor composed of the second polycrystalline silicon film; doping one of a portion and an entire region of the first region of the second polycrystalline silicon film with the first conductivity type impurity at a concentration of 1Ã—1019 atoms/cm3 or higher; doping one of a portion and an entire region of the second region of the second polycrystalline silicon film with the second conductivity type impurity at a concentration of 1Ã—1019 atoms/cm3 or higher; forming an intermediate insulating film over the semiconductor substrate; forming a contact hole in the intermediate insulating film over the semiconductor substrate; and providing a metallic wiring in the contact hole.