公开(公告)号：GB2497849B

公开(公告)日：2016-02-03

申请号：GB201222136

申请日：2012-12-10

Applicant: IBM

Inventor： YAMASHITA TENKO ,  DIVAKARUNI RAMACHANDRA ,  BU HUIMING ,  SHANG HUILING ,  CHUNG-HSUN LIN ,  ANDO TAKASHI ,  DORIS BRUCE B

IPC: H01L29/66 ,  H01L29/78

Abstract: A method includes forming on a surface of a semiconductor a dummy gate structure comprised of a plug; forming a first spacer surrounding the plug, the first spacer being a sacrificial spacer; and performing an angled ion implant so as to implant a dopant species into the surface of the semiconductor adjacent to an outer sidewall of the first spacer to form a source extension region and a drain extension region, where the implanted dopant species extends under the outer sidewall of the first spacer by an amount that is a function of the angle of the ion implant. The method further includes performing a laser anneal to activate the source extension and the drain extension implant. The method further includes forming a second spacer surrounding the first spacer, removing the first spacer and the plug to form an opening, and depositing a gate stack in the opening.

公开(公告)号：GB2497849A

公开(公告)日：2013-06-26

申请号：GB201222136

申请日：2012-12-10

Applicant: IBM

Inventor： YAMASHITA TENKO ,  DIVAKARUNI RAMACHANDRA ,  BU HUIMING ,  SHANG HUILING ,  CHUNG-HSUN LIN ,  ANDO TAKASHI ,  DORIS BRUCE B

IPC: H01L29/66 ,  H01L29/78

Abstract: A method to fabricate a field effect transistor includes forming on a surface of a semiconductor 10 a dummy gate structure comprised of a plug 14, forming a first spacer 18 surrounding the plug, the first spacer being a sacrificial spacer, and performing an angled ion implant so as to implant a dopant species into the surface of the semiconductor adjacent to an outer sidewall of the first spacer to form source and drain extension regions 20, such that the implanted species extends under the outer sidewall of the first spacer by an amount that is a function of the angle of the ion implant. The method further includes performing a laser anneal to activate the source and drain extension implants. In further processing, a second spacer is formed surrounding the first spacer, the first spacer and dummy gate are removed to form an opening and a gate stack is deposited in the opening.