Method and structure for reduction of contact resistance of metal silicides using a metal-germanium alloy
    7.
    发明授权
    Method and structure for reduction of contact resistance of metal silicides using a metal-germanium alloy 失效
    使用金属锗合金降低金属硅化物的接触电阻的方法和结构

    公开(公告)号:US06331486B1

    公开(公告)日:2001-12-18

    申请号:US09519897

    申请日:2000-03-06

    IPC分类号: H01L244

    CPC分类号: H01L21/28518

    摘要: A method of reducing contact resistance of metal silicides to a silicon-containing substrate is provided. The method includes first forming a metal germanium layer over a silicon-containing substrate. An optionally oxygen barrier layer may be formed over the metal germanium layer. Next, the structure containing the metal germanium layer is annealed at a temperature effective in converting at least a portion of the metal germanium layer into a substantially non-etchable metal silicide layer, while forming a Si-Ge interlayer between the substrate and the silicide layer. After annealing, the optional oxygen barrier layer and any remaining metal germanium layer is removed from the substrate.

    摘要翻译: 提供了一种降低金属硅化物与含硅衬底的接触电阻的方法。 该方法包括首先在含硅衬底上形成金属锗层。 可以在金属锗层上形成任选的氧阻挡层。 接下来,含有金属锗层的结构在有效地将金属锗层的至少一部分转化为基本上不可蚀刻的金属硅化物层的同时,在衬底和硅化物层之间形成Si-Ge中间层的温度下进行退火 。 在退火之后,从衬底去除可选的氧阻挡层和任何剩余的金属锗层。

    Method and structure for reduction of contact resistance of metal silicides using a metal-germanium alloy
    8.
    发明授权
    Method and structure for reduction of contact resistance of metal silicides using a metal-germanium alloy 有权
    使用金属锗合金降低金属硅化物的接触电阻的方法和结构

    公开(公告)号:US07102234B2

    公开(公告)日:2006-09-05

    申请号:US10827064

    申请日:2004-04-19

    IPC分类号: H01L23/48 H01L29/40

    CPC分类号: H01L21/28518

    摘要: A method of reducing the contact resistance of metal silicides to the p+ silicon area or the n+ silicon area of the substrate comprising: (a) forming a metal germanium (Ge) layer over a silicon-containing substrate, wherein said metal is selected from the group consisting of Co, Ti, Ni and mixtures thereof; (b) optionally forming an oxygen barrier layer over said metal germanium layer; (c) annealing said metal germanium layer at a temperature which is effective in converting at least a portion thereof into a substantially non-etchable metal silicide layer, while forming a Si—Ge interlayer between said silicon-containing substrate and said substantially non-etchable metal silicide layer; and (d) removing said optional oxygen barrier layer and any remaining alloy layer. When a Co or Ti alloy is employed, e.g., Co—Ge or Ti—Ge, two annealing steps are required to provide the lowest resistance phase of those metals, whereas, when Ni is employed, a single annealing step forms the lowest resistance phase of Ni silicide.

    摘要翻译: 一种降低金属硅化物与衬底的p +硅区域或n +硅区域的接触电阻的方法,包括:(a)在含硅衬底上形成金属锗(Ge)层,其中所述金属选自 由Co,Ti,Ni及其混合物组成的组; (b)任选地在所述金属锗层上形成氧阻隔层; (c)在有效地将其至少一部分转化成基本上不可蚀刻的金属硅化物层的温度下退火所述金属锗层,同时在所述含硅衬底和所述基本上不可蚀刻的衬底之间形成Si-Ge中间层 金属硅化物层; 和(d)去除所述任选的氧气阻挡层和任何剩余的合金层。 当使用Co或Ti合金时,例如Co-Ge或Ti-Ge,需要两个退火步骤来提供这些金属的最低电阻相,而在使用Ni时,单个退火步骤形成最低的电阻相 的Ni硅化物。

    Method and structure for reduction of contact resistance of metal silicides using a metal-germanium alloy
    10.
    发明授权
    Method and structure for reduction of contact resistance of metal silicides using a metal-germanium alloy 有权
    使用金属锗合金降低金属硅化物的接触电阻的方法和结构

    公开(公告)号:US06753606B2

    公开(公告)日:2004-06-22

    申请号:US09994954

    申请日:2001-11-27

    IPC分类号: H01L2348

    CPC分类号: H01L21/28518

    摘要: A method of reducing the contact resistance of metal silicides to the p+ silicon area or the n+ silicon area of the substrate comprising: (a) forming a metal germanium (Ge) layer over a silicon-containing substrate, wherein said metal is selected from the group consisting of Co, Ti, Ni and mixtures thereof; (b) optionally forming an oxygen barrier layer over said metal germanium layer; (c) annealing said metal germanium layer at a temperature which is effective in converting at least a portion thereof into a substantially non-etchable metal silicide layer, while forming a Si—Ge interlayer between said silicon-containing substrate and said substantially non-etchable metal silicide layer; and (d) removing said optional oxygen barrier layer and any remaining alloy layer. When a Co or Ti alloy is employed, e.g., Co—Ge or Ti—Ge, two annealing steps are required to provide the lowest resistance phase of those metals, whereas, when Ni is employed, a single annealing step forms the lowest resistance phase of Ni silicide.

    摘要翻译: 一种降低金属硅化物与衬底的p +硅区域或n +硅区域的接触电阻的方法,包括:(a)在含硅衬底上形成金属锗(Ge)层,其中所述金属选自 由Co,Ti,Ni及其混合物组成的组; (b)任选地在所述金属锗层上形成氧阻隔层; (c)在有效地将其至少一部分转化成基本上不可蚀刻的金属硅化物层的温度下退火所述金属锗层,同时在所述含硅衬底和所述基本上不可蚀刻的衬底之间形成Si-Ge中间层 金属硅化物层; 和(d)去除所述任选的氧气阻挡层和任何剩余的合金层。 当使用Co或Ti合金时,例如Co-Ge或Ti-Ge,需要两个退火步骤来提供这些金属的最低电阻相,而在使用Ni时,单个退火步骤形成最低的电阻相 的Ni硅化物。