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公开(公告)号:EP1805798A4
公开(公告)日:2009-08-05
申请号:EP05812439
申请日:2005-09-30
Applicant: IBM
Inventor: MARTIN DALE W , SHANK STEVEN M , TRIPLETT MICHAEL C , TUCKER DEBORAH A
IPC: H01L23/48 , H01L21/302 , H01L21/336 , H01L21/469 , H01L21/4763
CPC classification number: H01L21/28247 , H01L21/28035 , H01L29/4916 , Y10S257/90
Abstract: A structure and fabrication method for a gate stack used to define source/drain regions in a semiconductor substrate (110). The method comprises (a) forming a gate dielectric layer (120) on top of the substrate (110), (b) forming a gate polysilicon layer (130) on top of the gate dielectric layer (120), (c) implanting n-type dopants in a top layer (130a) of the gate polysilicon layer (130), (d) etching away portions of the gate polysilicon layer (130) and the gate dielectric layer (120) so as to form a gate stack (132, 134, 122) on the substrate (110), and (e) thermally oxidizing side walls of the gate stack (132, 134, 122) with the presence of a nitrogen-carrying gas. As a result, a diffusion barrier layer (170) is formed at the same depth in the polysilicon material of the gate stack (132, 134, 122) regardless of the doping concentration. Therefore, the n-type doped region (132) of the gate stack has the same width as that of the undoped region (134) of the gate stack (132, 134, 122.).
Abstract translation: 用于在半导体衬底(110)中限定源极/漏极区域的栅极叠层的结构和制造方法。 该方法包括:(a)在衬底(110)的顶部上形成栅极介电层(120),(b)在栅极介电层(120)的顶部上形成栅极多晶硅层(130),(c) (130)的顶层(130a)中,(d)蚀刻掉栅极多晶硅层(130)和栅极介电层(120)的部分以形成栅极叠层(132) (110)上,并且(e)在存在载氮气体的情况下热氧化栅叠层(132,134,122)的侧壁。 结果,不管掺杂浓度如何,在栅极叠层(132,134,122)的多晶硅材料中以相同的深度形成扩散阻挡层(170)。 因此,栅极堆叠的n型掺杂区域(132)具有与栅极堆叠(132,134,122)的未掺杂区域(134)相同的宽度。
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公开(公告)号:WO2006039632A3
公开(公告)日:2006-08-10
申请号:PCT/US2005035455
申请日:2005-09-30
Applicant: IBM , MARTIN DALE W , SHANK STEVEN M , TRIPLETT MICHAEL C , TUCKER DEBORAH A
Inventor: MARTIN DALE W , SHANK STEVEN M , TRIPLETT MICHAEL C , TUCKER DEBORAH A
IPC: H01L23/48 , H01L21/302 , H01L21/336 , H01L21/469 , H01L21/4763
CPC classification number: H01L21/28247 , H01L21/28035 , H01L29/4916 , Y10S257/90
Abstract: A structure and fabrication method for a gate stack used to define source/drain regions in a semiconductor substrate (110). The method comprises (a) forming a gate dielectric layer (120) on top of the substrate (110), (b) forming a gate polysilicon layer (130) on top of the gate dielectric layer (120), (c) implanting n-type dopants in a top layer (130a) of the gate polysilicon layer (130), (d) etching away portions of the gate polysilicon layer (130) and the gate dielectric layer (120) so as to form a gate stack (132, 134, 122) on the substrate (110), and (e) thermally oxidizing side walls of the gate stack (132, 134, 122) with the presence of a nitrogen-carrying gas. As a result, a diffusion barrier layer (170) is formed at the same depth in the polysilicon material of the gate stack (132, 134, 122) regardless of the doping concentration. Therefore, the n-type doped region (132) of the gate stack has the same width as that of the undoped region (134) of the gate stack (132, 134, 122.).
Abstract translation: 一种用于限定半导体衬底(110)中的源极/漏极区域的栅堆叠的结构和制造方法。 该方法包括:(a)在衬底(110)的顶部上形成栅极电介质层(120),(b)在栅极电介质层(120)的顶部上形成栅极多晶硅层(130),(c) 栅极多晶硅层(130)的顶层(130a)中的(d)型掺杂剂,(d)蚀刻掉栅极多晶硅层(130)和栅极电介质层(120)的部分,以形成栅叠层 ,134,122),以及(e)在存在含氮气体的情况下热氧化所述栅堆叠(132,134,122)的侧壁。 结果,不管掺杂浓度如何,在栅极堆叠(132,134,122)的多晶硅材料中的相同深度处形成扩散阻挡层(170)。 因此,栅极堆叠的n型掺杂区域(132)具有与栅极叠层(132,134,122。)的未掺杂区域(134)相同的宽度。
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