公开(公告)号：DE10393309T5

公开(公告)日：2005-12-29

申请号：DE10393309

申请日：2003-09-16

Applicant: IBM ,  INFINEON TECHNOLOGIES AG

Inventor： CABRAL CYRIL JR ,  IGGULDEN ROY C ,  MCSTAY IRENE LENNOX ,  CLEVENGER LAWRENCE A ,  WANG YUN YU ,  WONG KEITH KWONG HON ,  ROBL WERNER ,  GLUSCHENKOV OLEG ,  MALIK RAJEEV ,  SCHUTZ RONALD J

IPC: H01L20060101 ,  H01L21/28 ,  H01L21/3205 ,  H01L21/336 ,  H01L21/4763 ,  H01L21/768 ,  H01L23/522 ,  H01L29/40 ,  H01L29/51 ,  H01L29/78

Abstract: A conductive structure in an integrated circuit ( 12 ), and a method of forming the structure, is provided that includes a polysilicon layer ( 30 ), a thin layer containing titanium over the polysilicon, a tungsten nitride layer ( 34 ) over the titanium-containing layer and a tungsten layer over the tungsten nitride layer. The structure also includes a silicon nitride interfacial region ( 38 ) between the polysilicon layer and the titanium-containing layer. The structure withstands high-temperature processing without substantial formation of metal silicides in the polysilicon layer ( 30 ) and the tungsten layer ( 32 ), and provides low interface resistance between the tungsten layer and the polysilicon layer.