Patent ID: 6194746
Filing Date: 2001-02-27
Classification: H01L,Y10S

Abstract:
A diode on a silicon wafer comprising:an active region in the silicon wafer being heavily doped with a first conductivity type dopant;a first refractory metal silicide layer contacting and covering at least a portion of said active region;an insulation layer contacting and covering at least a portion of said first refractory metal silicide layer, said insulation layer having a diode opening extending therethrough and communicating with said first refractory metal silicide layer;a polysilicon plug disposed within said diode opening and contacting said first refractory metal silicide layer, said polysilicon plug comprising:a bottom portion in contact with said first refractory metal silicide layer and being lightly doped with said first conductivity type dopant, anda top portion in contact with said bottom portion; anda metalization material contacting said top portion of said polysilicon plug.