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    • 1. 发明授权
    • Self-aligned double gate device and method for forming same
    • 自对准双门装置及其形成方法
    • US07230270B2
    • 2007-06-12
    • US10997446
    • 2004-11-24
    • Hao-Yu ChenJu-Wang HsuBaw-Ching PerngFu-Liang Yang
    • Hao-Yu ChenJu-Wang HsuBaw-Ching PerngFu-Liang Yang
    • H01L29/10H01L27/01
    • H01L29/78648H01L27/1203
    • In a method of forming a double gate device, a buried insulating layer having a thickness of less than about 30 nm is formed on a first substrate. A second substrate is formed on the buried insulating layer. A pad layer is formed over the second substrate. A mask layer is formed over the pad layer. A first trench is formed extending through the pad layer, second substrate, buried insulating layer and into the first substrate. The first trench is filled with a first isolation. A second trench is formed in the first isolation and filled with a conductive material. An MOS transistor is formed on the second substrate. A bottom gate is formed under the buried insulating layer and self-aligned to the top gate formed on the second substrate.
    • 在形成双栅极器件的方法中,在第一衬底上形成厚度小于约30nm的掩埋绝缘层。 第二衬底形成在掩埋绝缘层上。 衬垫层形成在第二衬底上。 掩模层形成在焊盘层上。 第一沟槽形成为延伸穿过衬垫层,第二衬底,埋入绝缘层并进入第一衬底。 第一个沟槽充满了第一个隔离。 在第一隔离中形成第二沟槽并填充导电材料。 在第二基板上形成MOS晶体管。 底栅形成在掩埋绝缘层的下方,并与形成在第二基板上的顶栅自对准。