公开(公告)号：EP1825508A4

公开(公告)日：2009-06-24

申请号：EP05852638

申请日：2005-12-01

Applicant: IBM

Inventor： CABRAL CYRIL JR ,  DZIOBKOWSKI CHESTER T ,  ELLIS-MONAGHAN JOHN J ,  FANG SUNFEI ,  LAVOIE CHRISTIAN ,  LUO ZHIJIONG ,  NAKOS JAMES S ,  STEEGEN AN L ,  WANN CLEMENT H

IPC: H01L21/8238 ,  H01L21/3205 ,  H01L21/44 ,  H01L21/4763

CPC classification number: H01L21/28518 ,  H01L21/823814 ,  H01L21/823835

Abstract: A method of fabricating a complementary metal oxide semiconductor (CMOS) device, wherein the method comprises forming a first well region (103) in a semiconductor substrate (102) for accommodation of a first type semiconductor device (130); forming a second well region (104) in the semiconductor substrate (102) for accommodation of a second type semiconductor device (140); shielding the first type semiconductor device (130) with a mask (114); depositing a first metal layer (118) over the second type semiconductor device (140); performing a first salicide formation on the second type semiconductor device (140); removing the mask (114); depositing a second metal layer (123) over the first and second type semiconductor devices (130,140); and performing a second salicide formation on the first type semiconductor device (130). The method requires only one pattern level and it eliminates pattern overlay as it also simplifies the processes to form different suicide material over different devices.

公开(公告)号：EP1911088A4

公开(公告)日：2008-11-12

申请号：EP06789024

申请日：2006-08-01

Applicant: IBM

Inventor： NAYFEH HASAN M ,  KUMAR MAHENDER ,  FANG SUNFEI ,  KEDZIERSKI JAKUB T ,  CABRAL CYRIL JR

IPC: H01L21/8238 ,  H01L21/336 ,  H01L21/4763 ,  H01L21/8234 ,  H01L29/00

CPC classification number: H01L21/823835 ,  H01L21/823842 ,  H01L29/66545 ,  H01L29/6659 ,  H01L29/7833

Abstract: A MOSFET structure and method of forming is described. The method includes forming a metal-containing layer (56) that is thick enough to fully convert the semiconductor layer (22) to a semiconductor metal alloy in a first MOSFET type region (40) but only thick enough to partially convert the semiconductor layer (20) to a semiconductor metal alloy in a second MOSFET type region (30). In one embodiment, the gate stack in a first MOSFET region (40) is recessed prior to forming the metal-containing layer (56) so that the height of the first MOSFET semiconductor stack is less than the height of the second MOSFET semiconductor stack. In another embodiment, the metal-containing layer (56) is thinned over a first type MOSFET region (40) relative to a second type MOSFET region (30) prior to the conversion process.

Abstract translation: 描述了MOSFET结构和形成方法。 该方法包括形成厚度足以在第一MOSFET型区域（40）中将半导体层（22）完全转换成半导体金属合金的含金属层（56），但其厚度仅足以部分地将半导体层（ 20）连接到第二MOSFET型区域（30）中的半导体金属合金。 在一个实施例中，在形成含金属层（56）之前使第一MOSFET区域（40）中的栅极堆叠凹陷，使得第一MOSFET半导体堆叠的高度小于第二MOSFET半导体堆叠的高度。 在另一个实施例中，在转换过程之前，含金属层（56）在第一类型MOSFET区域（40）上相对于第二类型MOSFET区域（30）变薄。

公开(公告)号：EP2022085A4

公开(公告)日：2011-08-03

申请号：EP07755161

申请日：2007-04-10

Applicant: IBM

Inventor： FANG SUNFEI ,  KNARR RANDOLPH F ,  KRISHNAN MAHADEVAIYER ,  LAVOIE CHRISTIAN ,  MO RENEE T ,  PRANATHARTHIHARAN BALASUBRAMANIAN ,  STRANE JAY W

IPC: H01L21/285 ,  H01L21/3213

CPC classification number: H01L21/28518 ,  C23F1/28 ,  C23F1/30 ,  C23F1/44

公开(公告)号：EP1831925A4

公开(公告)日：2009-06-24

申请号：EP05852637

申请日：2005-12-01

Applicant: IBM

Inventor： FANG SUNFEI ,  CABRAL CYRIL JR ,  DZIOBKOWSKI CHESTER T ,  LAVOIE CHRISTIAN ,  WANN CLEMENT H

IPC: H01L21/8238

CPC classification number: H01L21/823835

Abstract: A method of forming a dual self-aligned fully silicided gate in a CMOS device requiring only one lithography level, wherein the method comprises forming a first type semiconductor device (270) having a first well region (253) in a semiconductor substrate (252), first source/drain silicide areas (266) in the first well region (253), and a first type gate (263) isolated from the first source/drain silicide areas (266); forming a second type semiconductor device (280) having a second well region (254) in the semiconductor substrate (252), second source/drain silicide areas (256) in the second well region (254), and a second type gate (258) isolated from the second source/drain silicide areas (256); selectively forming a first metal layer (218) over the second type semiconductor device (280); performing a first fully silicided (FUSI) gate formation on only the second type gate (258); depositing a second metal layer (275) over the first and second type semiconductor devices (270,280); and performing a second FUSI gate formation on only the first type gate (263).

公开(公告)号：EP1856725A4

公开(公告)日：2009-01-14

申请号：EP06717971

申请日：2006-01-10

Applicant: IBM

Inventor： LUO ZHIJIONG ,  FANG SUNFEI ,  ZHU HUILONG

IPC: H01L21/336 ,  H01L29/76

CPC classification number: H01L29/4975 ,  H01L21/28097 ,  H01L21/823835 ,  H01L29/665 ,  H01L29/7833

Abstract: A process for forming a metal silicide gate in an FET device, where the suicide is self-forming (that is, formed without the need for a separate metal/silicon reaction step), and no CMP or etchback of the silicon material is required. A first layer of silicon material (3) (polysilicon or amorphous silicon) is formed overlying the gate dielectric (2); a layer of metal (4) is then formed on the first layer (3), and a second layer of silicon (5) on the metal layer (4). A high-temperature (greater than 700 0C) processing step, such as source/drain activation anneal, is subsequently performed; this step is effective to form a silicide layer (30) above the gate dielectric (2) by reaction of the metal with silicon in the first layer. A second high-temperature processing step (such as source/drain silicidation) may be performed which is effective to form a second silicide layer (50) from silicon in the second layer (5). The thicknesses of the layers are such that in the high-temperature processing, substantially all the first layer and at least a portion of the second layer are replaced by silicide material. Accordingly, a fully suicided gate structure may be produced.