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    • 4. 发明授权
    • Self-aligned emitter-base in advanced BiCMOS technology
    • 先进的BiCMOS技术中的自对准发射极基极
    • US08716096B2
    • 2014-05-06
    • US13323977
    • 2011-12-13
    • Kevin K. ChanDavid L. HarameRussell T. HerrinQizhi Liu
    • Kevin K. ChanDavid L. HarameRussell T. HerrinQizhi Liu
    • H01L21/331H01L21/8222
    • H01L29/737H01L21/8249H01L27/0623H01L29/66242H01L29/66272H01L29/732H01L29/7371
    • A self-aligned bipolar transistor and method of fabricating the same are disclosed. In an embodiment, a substrate and an intrinsic base are provided, followed by a first oxide layer, and an extrinsic base over the first oxide layer. A first opening is formed, exposing a portion of a surface of the extrinsic base. Sidewall spacers are formed in the first opening, and a self-aligned oxide mask is selectively formed on the exposed surface of the extrinsic base. The spacers are removed, and using the self-aligned oxide mask, the exposed extrinsic base and the first oxide layer are etched to expose the intrinsic base layer, forming a first and a second slot. A silicon layer stripe is selectively grown on the exposed intrinsic and/or extrinsic base layers in each of the first and second slots, substantially filling the respective slot.
    • 公开了一种自对准双极晶体管及其制造方法。 在一个实施例中,提供衬底和本征基极,随后是第一氧化物层,以及在第一氧化物层上的外部基极。 形成第一开口,暴露外部基底的表面的一部分。 在第一开口中形成侧壁间隔物,并且在外基的暴露表面上选择性地形成自对准氧化物掩模。 去除间隔物,并且使用自对准氧化物掩模,暴露的非本征基底和第一氧化物层被蚀刻以暴露本征基底层,形成第一和第二狭槽。 在第一和第二槽中的每一个中的暴露的本征和/或非本征基极层上选择性地生长硅层条纹,基本上填充相应的槽。