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    • 3. 发明授权
    • Method to encapsulate copper plug for interconnect metallization
    • 封装用于互连金属化的铜插头的方法
    • US06696761B2
    • 2004-02-24
    • US09785108
    • 2001-02-20
    • Lap ChanSam Fong Yau LiHou Tee Ng
    • Lap ChanSam Fong Yau LiHou Tee Ng
    • H01L2348
    • H01L21/76849H01L21/7684H01L21/76879H01L23/485H01L23/53238H01L2924/0002H01L2924/00
    • An encapsulated copper plug on a doped silicon semiconductor substrate has a substrate surface, covered with insulation, with a plug hole with a diffusion barrier formed on the walls and the bottom of the hole to the top of the hole. The plug hole is partially filled with an electrolessly deposited copper metal plug. An encapsulating metal deposit caps the plug without any intervening oxidation and degradation. In a transition from copper to a codeposit of copper, an encapsulating Pt, Pd, and/or Ag metal deposits in the electroless bath without oxidation and degradation followed by a pure deposit of the encapsulating metal layer to cap the plug. The surface of the encapsulating metal deposit is formed by overgrowth above the plug hole followed by polishing the surface of the insulator layer removing the overgrowth of the metal layer polished by a CMP process to planarize the surface of the insulator layer which is the top surface of device to achieve coplanarity of metal layer with the topography of the insulator layer.
    • 掺杂硅半导体衬底上的封装铜插头具有覆盖有绝缘体的衬底表面,其上形成有扩散阻挡层的插塞孔,孔形成在孔的顶部和顶部。 塞孔部分地填充有无电沉积的铜金属塞。 封装金属沉积物对插头进行覆盖,而不会发生任何中间氧化和降解。 在从铜到铜的共沉积物的转变中,封装的Pt,Pd和/或Ag金属在无电镀浴中沉积而不氧化和降解,然后纯化沉积包封金属层以堵住塞子。 封装金属沉积物的表面通过在插塞孔上方过度生长而形成,随后抛光绝缘体层的表面,从而去除通过CMP工艺抛光的金属层的过度生长,以使作为顶部表面的绝缘体层的表面平坦化 器件实现金属层与绝缘体层的形貌的共面性。
    • 10. 发明授权
    • Method to form uniform silicide features
    • 形成均匀硅化物特征的方法
    • US06281117B1
    • 2001-08-28
    • US09425994
    • 1999-10-25
    • Lap ChanChaw Sing HoFong Yau Sam LiHou Tee Ng
    • Lap ChanChaw Sing HoFong Yau Sam LiHou Tee Ng
    • H01L214763
    • H01L21/28518Y10S977/859
    • A method for forming uniform ultrathin silicide features in the fabrication of an integrated circuit is described. A metal layer is deposited over the surface of a silicon semiconductor substrate. An array of heated metallic tips contact the metal layer whereby the metal layer is transformed to a metal silicide where it is contacted by the metallic tips and wherein the metal layer not contacted by the metallic tips is unreacted. The unreacted metal layer is removed leaving the metal silicide as uniform ultrathin silicide features. Alternatively, a metal acetate layer is spin-coated over the surface of a silicon semiconductor substrate. An array of heated metallic tips contacts the metal acetate layer whereby the metal acetate layer is transformed to a metal silicide where the metallic tips contact the metal acetate layer and wherein the metal acetate slayer not contacted by the metallic tips is unreacted. Or the metal acetate layer is heat treated at localized regions using a multi-array of tips aligned in a specific layout. Or the metal acetate layer is contacted by heated metallic tips under vacuum so that the metal does not oxidize. The unreacted metal acetate layer is removed leaving the metal silicide as the uniform ultrathin silicide features.
    • 描述了在制造集成电路中形成均匀的超薄硅化物特征的方法。 金属层沉积在硅半导体衬底的表面上。 加热的金属尖端的阵列接触金属层,由此将金属层转变为金属硅化物,在金属硅化物中金属层与金属顶端接触,并且其中不与金属尖端接触的金属层是未反应的。 除去未反应的金属层,留下金属硅化物作为均匀的超薄硅化物特征。 或者,将金属乙酸盐层旋涂在硅半导体衬底的表面上。 加热的金属尖端的阵列接触金属乙酸盐层,由此金属乙酸盐层转变为金属硅化物,其中金属尖端与金属乙酸盐层接触,并且其中未与金属尖端接触的金属乙酸盐钝化剂未反应。 或者使用在特定布局中对齐的多阵列尖端在局部区域对金属乙酸盐层进行热处理。 或者金属乙酸盐层在真空下被加热的金属尖端接触,使得金属不氧化。 除去未反应的金属乙酸盐层,留下金属硅化物作为均匀的超薄硅化物特征。