Bipolar device having shallow junction raised extrinsic base and method for making the same
    4.
    发明申请
    Bipolar device having shallow junction raised extrinsic base and method for making the same 失效
    具有浅结的双极器件提出外在基极及其制造方法

    公开(公告)号:US20030057458A1

    公开(公告)日:2003-03-27

    申请号:US09962738

    申请日:2001-09-25

    CPC classification number: H01L29/66242 H01L29/1004 H01L29/7378

    Abstract: A raised extrinsic base, silicon germanium (SiGe) heterojunction bipolar transistor (HBT), and a method of making the same is disclosed herein. The heterojunction bipolar transistor includes a substrate, a silicon germanium layer formed on the substrate, a collector layer formed on the substrate, a raised extrinsic base layer formed on the silicon germanium layer, and an emitter layer formed on the silicon germanium layer. The silicon germanium layer forms a heterojunction between the emitter layer and the raised extrinsic base layer. The bipolar transistor further includes a base electrode formed on a portion of the raised extrinsic base layer, a collector electrode formed on a portion of the collector layer, and an emitter electrode formed on a portion of the emitter layer. Thus, the heterojunction bipolar transistor includes a self-aligned raised extrinsic base, a minimal junction depth, and minimal interstitial defects influencing the base width, all being formed with minimal thermal processing. The heterojunction bipolar transistor simultaneously improves three factors that affect the speed and performance of bipolar transistors: base width, base resistance, and base-collector capacitance.

    Abstract translation: 本文公开了一种凸起的外在基极,硅锗(SiGe)异质结双极晶体管(HBT)及其制造方法。 异质结双极晶体管包括基板,形成在基板上的硅锗层,形成在基板上的集电极层,形成在硅锗层上的升高的非本征基极层和形成在硅锗层上的发射极层。 硅锗层在发射极层和凸起的非本征基极层之间形成异质结。 双极晶体管还包括形成在凸起的非本征基极层的一部分上的基极,在集电极层的一部分上形成的集电极,以及形成在发射极层的一部分上的发射极。 因此,异质结双极晶体管包括自对准凸起的外在基极,最小结深度以及影响基底宽度的最小间隙缺陷,全部以最小的热处理形成。 异质结双极晶体管同时改善了影响双极晶体管速度和性能的三个因素:基极宽度,基极电阻和基极集电极电容。

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