公开(公告)号：EP1356507A4

公开(公告)日：2008-05-21

申请号：EP01996224

申请日：2001-12-30

Applicant: IBM

Inventor： GIEWONT KENNETH J ,  BRODSKY STEPHEN BRUCE ,  CABRAL CYRIL JR ,  DOMENICUCCI ANTHONY G ,  RANSOM CRAIG MITCHELL ,  WANG YUN-YU ,  WILDMAN HORATIO S ,  WONG KWONG HON

IPC: C23C14/06 ,  C23C14/34 ,  H01L21/28 ,  H01L21/285 ,  H01L29/423 ,  H01L29/49 ,  H01L29/78 ,  H01L21/44

CPC classification number: C23C14/0094 ,  C23C14/0641 ,  H01L21/28052 ,  H01L21/28518 ,  H01L21/2855

Abstract: A method is provided for forming a capping layer for a semiconductor structure including a silicide-forming metal (2) overlying silicon (1). According to the invention, a layer of nitride (51) is formed overlying the semiconductor structure and in contact with the silicide-forming metal (2). This layer is formed by sputtering form a target in an ambient characterized by a nitrogen flow less than about 45 sccm. The layer is therefore deficient in nitrogen, so that formation of an oxynitride at a native oxide layer (11) on the silicon is avoided and diffusion between the silicon (1) and the metal (2) is not inhibited.

公开(公告)号：JP2002334850A

公开(公告)日：2002-11-22

申请号：JP2002096570

申请日：2002-03-29

Applicant: IBM

Inventor： GIEWONT KENNETH J ,  WANG YUN YU ,  RUSSELL AANTO ,  RANSOM CRAIG ,  COFFIN JUDITH ,  DOMENICUCCI ANTHONY ,  MACDONALD MICHAEL ,  JOHNSON BRIAN E

IPC: H01L21/28 ,  H01L21/02 ,  H01L21/306 ,  H01L21/311 ,  H01L21/336 ,  H01L29/78

Abstract: PROBLEM TO BE SOLVED: To provide a high-quality silicide layer having a high sheet resistance. SOLUTION: A method of preparing a semiconductor material for forming the silicide layer in selected areas is disclosed. In the representative embodiment, the method includes a step of removing at least one of a nitride film and an oxynitride film from the selected area, a step of removing metallic particles from the selected area, and a step of removing surface particles from the selected area. The method also includes a step of removing organics from the selected areas and a step of removing an oxide film layer from the selected areas.