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    Self-aligned metal to form contacts to Ge containing substrates and structure formed thereby
    41.
    发明授权
    Self-aligned metal to form contacts to Ge containing substrates and structure formed thereby 有权
    自对准金属与Ge形成的基板和由此形成的结构形成接触

    公开(公告)号：US08154130B2

    公开(公告)日：2012-04-10

    申请号：US12107992

    申请日：2008-04-23

    申请人： Cyril Cabral, Jr. ,  Roy A. Carruthers ,  Christophe Detavernier ,  Simon Gaudet ,  Christian Lavoie ,  Huiling Shang

    发明人： Cyril Cabral, Jr. ,  Roy A. Carruthers ,  Christophe Detavernier ,  Simon Gaudet ,  Christian Lavoie ,  Huiling Shang

    IPC分类号： H01L29/40

    CPC分类号： H01L21/28525 ,  H01L21/28052 ,  H01L21/28518 ,  H01L29/665

    摘要： A method for forming germano-silicide contacts atop a Ge-containing layer that is more resistant to etching than are conventional silicide contacts that are formed from a pure metal is provided. The method of the present invention includes first providing a structure which comprises a plurality of gate regions located atop a Ge-containing substrate having source/drain regions therein. After this step of the present invention, a Si-containing metal layer is formed atop the said Ge-containing substrate. In areas that are exposed, the Ge-containing substrate is in contact with the Si-containing metal layer. Annealing is then performed to form a germano-silicide compound in the regions in which the Si-containing metal layer and the Ge-containing substrate are in contact; and thereafter, any unreacted Si-containing metal layer is removed from the structure using a selective etch process. In some embodiments, an additional annealing step can follow the removal step. The method of the present invention provides a structure having a germano-silicide contact layer atop a Ge-containing substrate, wherein the germano-silicide contact layer contains more Si than the underlying Ge-containing substrate.

    摘要翻译： 提供了一种形成锗硅化物的方法，该方法与由纯金属形成的常规硅化物接触相比更能抵抗蚀刻的含Ge层顶部接触。 本发明的方法包括首先提供一种结构，该结构包括位于其中具有源极/漏极区域的含Ge衬底顶部的多个栅极区域。 在本发明的该步骤之后，在所述含Ge基材上形成含Si金属层。 在暴露的区域中，含Ge衬底与含Si金属层接触。 然后进行退火以在含Si金属层和含Ge基板接触的区域中形成锗化硅化合物; 此后，使用选择性蚀刻工艺从结构中除去任何未反应的含Si金属层。 在一些实施方案中，附加的退火步骤可以跟随去除步骤。 本发明的方法提供了一种在含Ge衬底顶上具有锗硅化物接触层的结构，其中锗硅化物接触层含有比下面的含Ge衬底更多的Si。

    Reduction of silicide formation temperature on SiGe containing substrates
    42.
    发明授权
    Reduction of silicide formation temperature on SiGe containing substrates 有权
    在含SiGe的基板上降低硅化物的形成温度

    公开(公告)号：US07384868B2

    公开(公告)日：2008-06-10

    申请号：US10662900

    申请日：2003-09-15

    申请人： Cyril Cabral, Jr. ,  Roy A. Carruthers ,  Jia Chen ,  Christophe Detavernier ,  James M. Harper ,  Christian Lavoie

    发明人： Cyril Cabral, Jr. ,  Roy A. Carruthers ,  Jia Chen ,  Christophe Detavernier ,  James M. Harper ,  Christian Lavoie

    IPC分类号： H01L21/44

    CPC分类号： H01L21/28518

    摘要： A method that solves the increased nucleation temperature that is exhibited during the formation of cobalt disilicides in the presence of Ge atoms is provided. The reduction in silicide formation temperature is achieved by first providing a structure including a Co layer including at least Ni, as an additive element, on top of a SiGe containing substrate. Next, the structure is subjected to a self-aligned silicide process which includes a first anneal, a selective etching step and a second anneal to form a solid solution of (Co, Ni) disilicide on the SiGe containing substrate. The Co layer including at least Ni can comprise an alloy layer of Co and Ni, a stack of Ni/Co or a stack of Co/Ni. A semiconductor structure including the solid solution of (Co, Ni) disilicide on the SiGe containing substrate is also provided.

    摘要翻译： 提供了一种解决在锗原子存在下形成二硅化钴期间显示的增加的成核温度的方法。 硅化物形成温度的降低通过首先提供包括至少包含Ni的Co层作为添加元素在包含SiGe的衬底的顶部上的结构来实现。 接下来，对该结构进行自对准硅化物工艺，其包括第一退火，选择性蚀刻步骤和第二退火，以在含SiGe的衬底上形成（Co，Ni）二硅化物的固溶体。 至少包括Ni的Co层可以包括Co和Ni的合金层，Ni / Co的堆叠或Co / Ni的堆叠。 还提供了包含（Co，Ni）二硅化物在含SiGe的衬底上的固溶体的半导体结构。

    Method and structure for reduction of contact resistance of metal silicides using a metal-germanium alloy
    45.
    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

    申请人： Cyril Cabral, Jr. ,  Roy Arthur Carruthers ,  James McKell Edwin Harper ,  Christian Lavoie ,  Ronnen Andrew Roy ,  Yun Yu Wang

    发明人： Cyril Cabral, Jr. ,  Roy Arthur Carruthers ,  James McKell Edwin Harper ,  Christian Lavoie ,  Ronnen Andrew Roy ,  Yun Yu Wang

    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 for self-aligned formation of silicide contacts using metal silicon alloys for limited silicon consumption and for reduction of bridging
    46.
    发明授权
    Method for self-aligned formation of silicide contacts using metal silicon alloys for limited silicon consumption and for reduction of bridging 有权
    使用金属硅合金自发对准形成硅化物接触的方法，用于有限的硅消耗和减少桥接

    公开(公告)号：US06323130B1

    公开(公告)日：2001-11-27

    申请号：US09515033

    申请日：2000-03-06

    申请人： Stephen Bruce Brodsky ,  Cyril Cabral, Jr. ,  Roy Arthur Carruthers ,  James McKell Edwin Harper ,  Christian Lavoie ,  Patricia Ann O'Neil ,  Yun Yu Wang

    发明人： Stephen Bruce Brodsky ,  Cyril Cabral, Jr. ,  Roy Arthur Carruthers ,  James McKell Edwin Harper ,  Christian Lavoie ,  Patricia Ann O'Neil ,  Yun Yu Wang

    IPC分类号： H01L2144

    CPC分类号： H01L29/665 ,  H01L21/28518

    摘要： A method of substantially reducing Si consumption and bridging during metal silicide contact formation comprising the steps of: (a) forming a metal silicon alloy layer over a silicon-containing substrate containing an electronic device to be electrically contacted, said silicon in said alloy layer being less than about 30 atomic % and said metal is Co, Ni or mixtures thereof; (b) annealing said metal silicon alloy layer at a temperature of from about 300° to about 500° C. so as to form a metal rich silicide layer that is substantially non-etchable compared to said metal silicon alloy or pure metal; (c) selectively removing any non-reacted metal silicon alloy over non-silicon regions; and (d) annealing said metal rich silicide layer under conditions effective in forming a metal silicide phase that is in its lowest resistance phase. An optional oxygen barrier layer may be formed over the metal silicon alloy layer prior to annealing step (b).

    摘要翻译： 一种在金属硅化物接触形成期间显着降低Si消耗和桥接的方法，包括以下步骤：（a）在含有电接触的电子器件的含硅衬底上形成金属硅合金层，所述合金层中的所述硅为 小于约30原子％，所述金属为Co，Ni或其混合物; （b）在约300℃至约500℃的温度下退火所述金属硅合金层，以便与所述金属硅合金或纯金属相比形成基本不可蚀刻的富金属硅化物层; （c）在非硅区域上有选择地去除任何未反应的金属硅合金; 和（d）在有效形成处于其最低电阻相的金属硅化物相的条件下退火所述富金属硅化物层。 可以在退火步骤（b）之前在金属硅合金层上形成任选的氧阻挡层。