Method to build self-aligned NPN in advanced BiCMOS technology
    4.
    发明授权
    Method to build self-aligned NPN in advanced BiCMOS technology 失效
    在先进的BiCMOS技术中构建自对准NPN的方法

    公开(公告)号:US07776704B2

    公开(公告)日:2010-08-17

    申请号:US11830376

    申请日:2007-07-30

    IPC分类号: H01L21/8222

    CPC分类号: H01L29/66242 H01L29/7378

    摘要: The present invention provides a method of forming a self-aligned heterobipolar transistor (HBT) device in a BiCMOS technology. The method includes forming a raised extrinsic base structure by using an epitaxial growth process in which the growth rate between single crystal silicon and polycrystalline silicon is different and by using a low temperature oxidation process such as a high-pressure oxidation (HIPOX) process to form a self-aligned emitter/extrinsic base HBT structure.

    摘要翻译: 本发明提供了一种在BiCMOS技术中形成自对准异双极晶体管(HBT)器件的方法。 该方法包括通过使用其中单晶硅和多晶硅的生长速率不同的外延生长工艺和通过使用诸如高压氧化(HIPOX)工艺的低温氧化工艺形成凸起的外在基体结构来形成 自对准发射极/非本征基极HBT结构。

    Bipolar transistor having raised extrinsic base with selectable self-alignment and methods of forming same
    5.
    发明授权
    Bipolar transistor having raised extrinsic base with selectable self-alignment and methods of forming same 失效
    双极晶体管具有可选择的自对准的外部基极和其形成方法

    公开(公告)号:US07253096B2

    公开(公告)日:2007-08-07

    申请号:US11289915

    申请日:2005-11-30

    IPC分类号: H01L21/4763

    摘要: A bipolar transistor with raised extrinsic base and selectable self-alignment between the extrinsic base and the emitter is disclosed. The fabrication method may include the formation of a predefined thickness of a first extrinsic base layer of polysilicon or silicon on an intrinsic base. A dielectric landing pad is then formed by lithography on the first extrinsic base layer. Next, a second extrinsic base layer of polysilicon or silicon is formed on top of the dielectric landing pad to finalize the raised extrinsic base total thickness. An emitter opening is formed using lithography and RIE, where the second extrinsic base layer is etched stopping on the dielectric landing pad. The degree of self-alignment between the emitter and the raised extrinsic base is achieved by selecting the first extrinsic base layer thickness, the dielectric landing pad width, and the spacer width.

    摘要翻译: 公开了一种具有凸起的外在基极和在本征基极和发射极之间可选自对准的双极晶体管。 制造方法可以包括在内在基底上形成多晶硅或硅的第一非本征基极层的预定厚度。 然后通过在第一非本征基层上的光刻形成电介质着色焊盘。 接下来,在电介质贴片垫的顶部上形成第二非多晶硅或硅的非本征基极层,以最终确定凸出的非本征基本总厚度。 使用光刻和RIE形成发射器开口,其中第二外部基极层被蚀刻停止在电介质着色焊盘上。 通过选择第一非本征基极层厚度,电介质着陆焊盘宽度和间隔物宽度来实现发射极和凸出的外部基极之间的自对准程度。