Patent ID: 6060377
Filing Date: 2000-05-09
Classification: H01L

Abstract:
A method for fabricating a polysilicon structure with a reduced length, the method including the steps of:A. forming a masking polysilicon structure having a first predetermined length defined by sidewalls on ends of said first predetermined length of said masking polysilicon structure;B. depositing a layer of metal on said sidewalls of said masking polysilicon structure, said layer of metal having a predetermined thickness;C. reacting said layer of metal with said masking polysilicon structure at said sidewalls of said masking polysilicon structure in a silicidation anneal to form metal silicide comprised of said layer of metal that has reacted with said masking polysilicon structure at said sidewalls of said masking polysilicon structure;and wherein said masking polysilicon structure has a second predetermined length that is reduced from said first predetermined length when said layer of metal has consumed into said sidewalls of said masking polysilicon structure after said silicidation anneal;and wherein said second predetermined length depends on said predetermined thickness of said layer of metal deposited on said sidewalls of said masking polysilicon structure in said step B; andD. using said masking polysilicon structure having said second predetermined length as a mask for etching a first layer of polysilicon to form said polysilicon structure from said first layer of polysilicon, said polysilicon structure having said reduced length that is substantially equal to said second predetermined length.