Patent ID: 6365463
Filing Date: 2002-04-02
Classification: H01L

Abstract:
A method of forming a device on a semiconductor wafer, the method comprising the steps of:forming a dielectric layer on the semiconductor wafer; forming a layer of material on the dielectric layer, the layer of material having a first region and a second region spaced apart from the first region; doping the first region of the layer of material with a first dopant to have a first dopant concentration; etching the layer of material to form a first gate from the first region and a second gate from the second region, and expose a surface region adjacent to the first and second gates; doping the first gate, the second gate, and the surface region with a second dopant to dope the first gate, dope the second gate, form a first source region and a first drain region in the semiconductor wafer on opposite sides of the first gate, and form a second source region and a second drain region in the semiconductor wafer on opposite sides of the second gate so that the layer of material forming the first gate has a second dopant concentration, the layer of material forming the second gate has a third dopant concentration, the first source and drain regions each have a fourth dopant concentration, and the second source and drain regions each have the fourth dopant concentration, the second dopant concentration being greater than the third dopant concentration by the first dopant concentration.