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    • 32. 发明授权
    • Electrical isolation structures for ultra-thin semiconductor-on-insulator devices
    • 用于超薄绝缘体上半导体器件的电气隔离结构
    • US08629008B2
    • 2014-01-14
    • US13348018
    • 2012-01-11
    • Balasubramanian S. HaranDavid V. HorakCharles W. Koburger, IIIShom Ponoth
    • Balasubramanian S. HaranDavid V. HorakCharles W. Koburger, IIIShom Ponoth
    • H01L21/02
    • H01L29/0653H01L21/76283H01L21/84H01L27/1203H01L29/66772H01L29/78603H01L29/78654
    • After formation of raised source and drain regions, a conformal dielectric material liner is deposited within recessed regions formed by removal of shallow trench isolation structures and underlying portions of a buried insulator layer in a semiconductor-on-insulator (SOI) substrate. A dielectric material that is different from the material of the conformal dielectric material liner is subsequently deposited and planarized to form a planarized dielectric material layer. The planarized dielectric material layer is recessed selective to the conformal dielectric material liner to form dielectric fill portions that fill the recessed regions. Horizontal portions of the conformal dielectric material liner are removed by an anisotropic etch, while remaining portions of the conformal dielectric material liner form an outer gate spacer. At least one contact-level dielectric layer is deposited. Contact via structures electrically isolated from a handle substrate can be formed within the contact via holes.
    • 在形成升高的源极和漏极区域之后,通过去除绝缘体上半导体(SOI)衬底中的浅沟槽隔离结构和掩埋绝缘体层的下面部分而形成的凹陷区域内淀积保形电介质材料衬垫。 随后沉积并平面化与保形介质材料衬垫的材料不同的介电材料,以形成平坦化的介电材料层。 平坦化的介电材料层对保形介电材料衬垫有选择性的凹陷,以形成填充凹陷区域的介电填充部分。 通过各向异性蚀刻去除保形电介质材料衬里的水平部分,而保形介质材料衬垫的剩余部分形成外栅间隔件。 沉积至少一个接触电介质层。 可以在接触通孔内形成与手柄基板电隔离的结构的接触。