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    • 26. 发明授权
    • Method for fabricating semiconductor device having high withstand voltage transistor
    • 制造具有高耐压晶体管的半导体器件的方法
    • US07220631B2
    • 2007-05-22
    • US11034948
    • 2005-01-14
    • Hitoshi AsadaHiroaki Inoue
    • Hitoshi AsadaHiroaki Inoue
    • H01L21/8238
    • H01L29/0847H01L21/823418H01L21/823468H01L29/41775H01L29/4933H01L29/6656H01L29/66659H01L29/7833H01L29/7835
    • The semiconductor device comprises a gate electrode 26 formed on a semiconductor substrate 10, a source region 45 a having a lightly doped source region 42a and a heavily doped source region 44a, a drain region 45b having a lightly doped drain region 42b and a heavily doped drain region 44b, a first silicide layer 40c formed on the source region, a second silicide layer 40d formed on the drain region, a first conductor plug 54 connected to the first silcide layer and a second conductor plug 54 connected to the second silicide layer. The heavily doped drain region is formed in the region of the lightly doped region except the peripheral region, and the second silicide layer is formed in the region of the heavily doped drain region except the peripheral region. Thus, the concentration of the electric fields on the drain region can be mitigated when voltages are applied to the drain region. Thus, even with the silicide layer formed on the source/drain region, sufficiently high withstand voltages of the high withstand voltage transistor can be ensured. Furthermore, the drain region alone has the above-described structure, whereby the increase of the source-drain electric resistance can be prevented while high withstand voltages can be ensured.
    • 半导体器件包括形成在半导体衬底10上的栅电极26,具有轻掺杂源区42a和重掺杂源区44a的源区45a,具有轻掺杂漏区42b的漏区45b 以及重掺杂漏区44b,形成在源极区上的第一硅化物层40c,形成在漏极区上的第二硅化物层40d,连接到第一硅化物层的第一导体插塞54和第二导体插塞54 连接到第二硅化物层。 重掺杂漏极区域形成在除了外围区域之外的轻掺杂区域的区域中,并且第二硅化物层形成在除了周边区域之外的重掺杂漏极区域的区域中。 因此,当向漏极区域施加电压时,可以减轻漏极区域上的电场的浓度。 因此,即使在源极/漏极区域上形成硅化物层,也可以确保高耐压晶体管的足够高的耐受电压。 此外,单独的漏极区域具有上述结构,由此可以防止源极 - 漏极电阻的增加,同时可以确保高耐受电压。
    • 27. 发明申请
    • Interconnects forming method and interconnects forming apparatus
    • 互连形成方法和互连形成装置
    • US20050282378A1
    • 2005-12-22
    • US10941882
    • 2004-09-16
    • Akira FukunagaManabu TsujimuraHiroaki Inoue
    • Akira FukunagaManabu TsujimuraHiroaki Inoue
    • C23C16/00C23C16/04C23C16/06H01L21/4763H01L21/768
    • H01L21/76843C23C16/042C23C16/045C23C16/06H01L21/7684H01L21/76849
    • An interconnects forming method and an interconnects forming apparatus are useful for embedding a conductive material (interconnect material), such as copper or silver, into interconnect recesses provided in a surface of a substrate, such as a semiconductor wafer, to thereby form embedded interconnects, and selectively covering the surfaces of embedded interconnects with a metal film (protective film) to provide a multi-level structure. The interconnects forming method comprises: providing a substrate which has been prepared by forming a barrier layer over a substrate surface having interconnect recesses formed in an insulating film, and then forming a film of an interconnect material in the interconnect recesses and over the substrate surface; removing extra interconnect material formed over the substrate surface, thereby forming interconnects with the interconnect material embedded in the interconnect recesses and making the barrier layer present in the other portion than the interconnect-formed portion exposed; and forming a metal film selectively on surfaces of interconnects.
    • 互连形成方法和互连形成装置可用于将诸如铜或银的导电材料(互连材料)嵌入设置在诸如半导体晶片的基板的表面中的互连凹槽中,从而形成嵌入式互连, 并且用金属膜(保护膜)选择性地覆盖嵌入式互连件的表面以提供多层结构。 互连形成方法包括:提供通过在绝缘膜上形成具有互连凹槽的衬底表面上形成阻挡层,然后在互连凹槽中并在衬底表面上形成互连材料的膜而制备的衬底; 去除形成在衬底表面上的额外的互连材料,从而与嵌入在互连凹槽中的互连材料形成互连,并使阻挡层存在于暴露的互连形成部分的另一部分中; 并在互连表面上选择性地形成金属膜。