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    • 94. 发明申请
    • Depletion-Free MOS using Atomic-Layer Doping
    • 消耗MOS的原子层掺杂
    • US20110018069A1
    • 2011-01-27
    • US12854638
    • 2010-08-11
    • Jing-Cheng LinChen-Hua Yu
    • Jing-Cheng LinChen-Hua Yu
    • H01L27/092
    • H01L21/823842H01L21/2254H01L21/28035H01L29/4925H01L29/6659
    • A semiconductor device and a method of manufacturing are provided. A dielectric layer is formed over a substrate, and a first silicon-containing layer, undoped, is formed over the dielectric layer. Atomic-layer doping is used to dope the undoped silicon-containing layer. A second silicon-containing layer is formed over first silicon-containing layer. The process may be expanded to include forming a PMOS and NMOS device on the same wafer. For example, the first silicon-containing layer may be thinned in the PMOS region prior to the atomic-layer doping. In the NMOS region, the doped portion of the first silicon-containing layer is removed such that the remaining portion of the first silicon-containing layer in the NMOS is undoped. Thereafter, another atomic-layer doping process may be used to dope the first silicon-containing layer in the NMOS region to a different conductivity type. A third silicon-containing layer may be formed doped to the respective conductivity type.
    • 提供半导体器件和制造方法。 介电层形成在衬底上,并且在介电层上形成未掺杂的第一含硅层。 原子层掺杂用于掺杂未掺杂的含硅层。 在第一含硅层上形成第二含硅层。 该过程可以扩展到包括在同一晶片上形成PMOS和NMOS器件。 例如,在原子层掺杂之前,第一含硅层可以在PMOS区中减薄。 在NMOS区域中,去除第一含硅层的掺杂部分,使得NMOS中的第一含硅层的剩余部分未掺杂。 此后,可以使用另一种原子层掺杂工艺将NMOS区域中的第一含硅层掺杂到不同的导电类型。 可以形成掺杂到相应导电类型的第三含硅层。