METAL GATE MOSFET BY FULL SEMICONDUCTOR METAL ALLOY CONVERSION
    5.
    发明申请
    METAL GATE MOSFET BY FULL SEMICONDUCTOR METAL ALLOY CONVERSION 审中-公开
    金属栅MOSFET通过全半导体金属合金转换

    公开(公告)号:US20070034967A1

    公开(公告)日:2007-02-15

    申请号:US11537718

    申请日:2006-10-02

    IPC分类号: H01L29/94

    摘要: A MOSFET structure and method of forming is described. The method includes forming a metal-containing layer that is thick enough to fully convert the semiconductor gate stack to a semiconductor metal alloy in a first MOSFET type region but only thick enough to partially convert the semiconductor gate stack to a semiconductor metal alloy in a second MOSFET type region. In one embodiment, the gate stack in a first MOSFET region is recessed prior to forming the metal-containing layer 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 is thinned over one MOSFET region relative to the other MOSFET region prior to the conversion process.

    摘要翻译: 描述了MOSFET结构和形成方法。 该方法包括形成足够厚的含金属层,以将半导体栅极堆叠完全转换成第一MOSFET型区域中的半导体金属合金,但是仅仅足够厚以将第二半导体栅极堆叠部分地转换为半导体金属合金 MOSFET类型区域。 在一个实施例中,在形成含金属层之前,第一MOSFET区域中的栅极堆叠是凹进的,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,含金属层相对于另一个MOSFET区域在一个MOSFET区域上变薄。

    Method and process for forming a self-aligned silicide contact
    10.
    发明申请
    Method and process for forming a self-aligned silicide contact 有权
    用于形成自对准硅化物接触的方法和工艺

    公开(公告)号:US20060051961A1

    公开(公告)日:2006-03-09

    申请号:US10935497

    申请日:2004-09-07

    IPC分类号: H01L21/44

    摘要: The present invention provides a method for forming a self-aligned Ni alloy silicide contact. The method of the present invention begins by first depositing a conductive Ni alloy with Pt and optionally at least one of the following metals Pd, Rh, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W or Re over an entire semiconductor structure which includes at least one gate stack region. An oxygen diffusion barrier comprising, for example, Ti, TiN or W is deposited over the structure to prevent oxidation of the metals. An annealing step is then employed to cause formation of a NiSi, PtSi contact in regions in which the metals are in contact with silicon. The metal that is in direct contact with insulating material such as SiO2 and Si3N4 is not converted into a metal alloy silicide contact during the annealing step. A selective etching step is then performed to remove unreacted metal from the sidewalls of the spacers and trench isolation regions.

    摘要翻译: 本发明提供一种形成自对准Ni合金硅化物接触的方法。 本发明的方法首先首先用Pt和任选的以下金属Pd,Rh,Ti,V,Cr,Zr,Nb,Mo,Hf,Ta,W或Re中的至少一种沉积导电Ni合金, 整个半导体结构,其包括至少一个栅极堆叠区域。 包含例如Ti,TiN或W的氧扩散阻挡层沉积在结构上以防止金属的氧化。 然后使用退火步骤在金属与硅接触的区域中形成NiSi,PtSi接触。 与诸如SiO 2和Si 3 N 4 N之类的绝缘材料直接接触的金属在金属合金硅化物接触期间不会转化为金属合金硅化物接触 退火步骤。 然后执行选择性蚀刻步骤以从间隔物和沟槽隔离区域的侧壁去除未反应的金属。