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    • 4. 发明申请
    • METHODS OF FABRICATING A DUAL POLYSILICON GATE AND METHODS OF FABRICATING A SEMICONDUCTOR DEVICE USING THE SAME
    • 制造双聚硅酮门的方法和使用其制造半导体器件的方法
    • US20120208334A1
    • 2012-08-16
    • US13365462
    • 2012-02-03
    • Kyong Bong ROUHYong Seok EUN
    • Kyong Bong ROUHYong Seok EUN
    • H01L21/8238
    • H01L21/82385H01L21/28114H01L21/823842H01L29/42376
    • Methods of forming a dual polysilicon gate are provided. The method includes forming a polysilicon layer doped with impurities of a first conductivity type on a substrate having a first region and a second region, forming a mask pattern that covers the polysilicon layer in the first region and leaves the polysilicon layer in the second region, injecting impurities of a second conductivity type into the polysilicon layer in the second region left exposed by the mask pattern. Removing the mask pattern, and patterning the polysilicon layer to form a first polysilicon pattern in the first region and a second polysilicon pattern in the second region. The second polysilicon pattern is formed to have protrusions that laterally protrude from sidewalls thereof. Subsequently, impurities of the second conductivity type are injected into the substrate in the second region and into the protrusions of the second polysilicon pattern.
    • 提供了形成双重多晶硅栅极的方法。 该方法包括在具有第一区域和第二区域的衬底上形成掺杂有第一导电类型的杂质的多晶硅层,形成覆盖第一区域中的多晶硅层并在第二区域中离开多晶硅层的掩模图案, 将第二导电类型的杂质注入到由掩模图案留下的第二区域中的多晶硅层中。 去除掩模图案,以及图案化多晶硅层以在第一区域中形成第一多晶硅图案,在第二区域形成第二多晶硅图案。 第二多晶硅图案被形成为具有从其侧壁横向突出的突起。 随后,将第二导电类型的杂质注入到第二区域中的衬底中并注入到第二多晶硅图案的突起中。