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    • 1. 发明授权
    • Forming a vertical PNP transistor
    • 形成垂直PNP晶体管
    • US5302534A
    • 1994-04-12
    • US844311
    • 1992-03-02
    • David J. MonkRobert H. ReussJenny M. Ford
    • David J. MonkRobert H. ReussJenny M. Ford
    • H01L21/331H01L21/8249H01L21/265H01L29/70
    • H01L29/66272H01L21/8249Y10S148/011
    • A transistor (10) is formed by utilizing an isolated well (18) within a thin epitaxial layer (14). A base mask (22) that has a base opening (23) is applied to expose a portion of the isolated well (18). A low resistance collector enhancement (24) is formed within the well (18) by doping a portion of the well (18) through the base opening (23). A base region (26) is formed overlying the collector enhancement (24) by doping the well (18) through the base opening (23). Forming the collector enhancement (24) through the base opening (23), facilitates providing the collector enhancement (24) with a small area thereby minimizing the transistor's (10) parasitic collector capacitance value, collector resistance, and transit time.
    • 通过利用薄外延层(14)内的隔离阱(18)形成晶体管(10)。 具有基部开口(23)的底座(22)被施加以暴露所述隔离井(18)的一部分。 通过将井(18)的一部分通过基座开口(23)掺杂,在阱(18)内形成低电阻集电极增强(24)。 通过将孔(18)掺杂穿过基座开口(23),形成覆盖集电极增强层(24)的基极区(26)。 通过基极开口(23)形成集电极增强(24),有利于使集电极增强(24)具有小的面积,从而最小化晶体管(10)的寄生集电极电容值,集电极电阻和通过时间。
    • 7. 发明授权
    • Heterojunction semiconductor device and method of manufacture
    • 异质结半导体器件及其制造方法
    • US5721438A
    • 1998-02-24
    • US593306
    • 1996-01-31
    • Zhirong TangJenny M. FordJohn W. Steele
    • Zhirong TangJenny M. FordJohn W. Steele
    • H01L29/737H01L31/0328H01L31/0336
    • H01L29/7378
    • A heterojunction bipolar transistor (HBT) (30) is formed to have a germanium composition profile (46) in a base region (32) that improves the tolerance of the HBT device (30) to manufacturing variations and reduces the sensitivity to emitter/base biases. A first region (40) of essentially constant germanium composition is formed at the interface of an emitter region (34) and the base region (32). The germanium composition profile (46) also has a second region (41) in which the germanium composition is increased linearly to provide an acceleration field by reducing the band gap in this second region (41). The acceleration field reduces the transit time of carriers and increases the frequency response of the HBT device (30).
    • 异质结双极晶体管(HBT)(30)形成为在基极区域(32)中具有锗组成分布(46),其改善了HBT器件(30)对制造变化的公差并降低了对发射极/基极的灵敏度 偏见 在发射极区域(34)和基极区域(32)的界面处形成基本上恒定的锗组成的第一区域(40)。 锗组成轮廓(46)还具有第二区域(41),其中锗组合物线性增加以通过减小该第二区域(41)中的带隙来提供加速度场。 加速度场减小了载波的通过时间,并增加了HBT设备的频率响应(30)。