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    • 6. 发明授权
    • Bipolar transistor with a raised collector pedestal for reduced capacitance
    • 双极晶体管带有集电极基座,用于降低电容
    • US08610174B2
    • 2013-12-17
    • US13307412
    • 2011-11-30
    • James W. AdkissonJohn J. Ellis-MonaghanDavid L. HarameQizhi LiuJohn J. Pekarik
    • James W. AdkissonJohn J. Ellis-MonaghanDavid L. HarameQizhi LiuJohn J. Pekarik
    • H01L31/109
    • H01L29/66234H01L29/0826H01L29/66287H01L29/732H01L29/7371
    • Disclosed is a transistor with a raised collector pedestal in reduced dimension for reduced base-collector junction capacitance. The raised collector pedestal is on the top surface of a substrate, extends vertically through dielectric layer(s), is un-doped or low-doped, is aligned above a sub-collector region contained within the substrate and is narrower than that sub-collector region. An intrinsic base layer is above the raised collector pedestal and the dielectric layer(s). An extrinsic base layer is above the intrinsic base layer. Thus, the space between the extrinsic base layer and the sub-collector region is increased. This increased space is filled by dielectric material and the electrical connection between the intrinsic base layer and the sub-collector region is provided by the relatively narrow, un-doped or low-doped, raised collector pedestal. Consequently, base-collector junction capacitance is reduced and, consequently, the maximum oscillation frequency is increased.
    • 公开了具有降低的集电极基座的晶体管,用于减小基极 - 集电极结电容。 凸起的收集器基座位于基板的顶表面上,垂直延伸穿过绝缘层(未掺杂或低掺杂)在衬底内的子集电极区域上方排列, 收集区域。 本征基层在凸起的收集器基座和介电层之上。 外在基层在本征基层之上。 因此,外部基极层和副集电极区域之间的空间增加。 该增加的空间由电介质材料填充,并且本征基极层和次集电极区域之间的电连接由相对窄的未掺杂或低掺杂的升高的集电极基座提供。 因此,集电极结电容减小,因此最大振荡频率增加。
    • 10. 发明授权
    • Method for fabricating high-gain MOSFETs with asymmetric source/drain doping for analog and RF applications
    • 用于制造模拟和RF应用的具有不对称源/漏掺杂的高增益MOSFET的方法
    • US08633082B2
    • 2014-01-21
    • US13302432
    • 2011-11-22
    • Sebastien LasserreJohn J. Pekarik
    • Sebastien LasserreJohn J. Pekarik
    • H01L21/336H01L21/8238
    • H01L29/66772H01L21/26586H01L27/105H01L27/1104H01L29/1083H01L29/66659
    • A method of fabrication of an analog, asymmetric Metal-Oxide-Semiconductor-Field-Effect-Transistor (MOSFET) is provided. The method may comprise forming a first gate oriented in a first direction over an active region of a semiconductor substrate, forming a second gate extending perpendicular to the first gate over a second active region, using a dual-directional implant process to form a reduced-HALO doped area on a drain side of the first gate and also for a HALO doped area for the second gate, while the source side of the first gate is covered by a resist. Additionally, the method may comprise forming a HALO doped area on the source side of the first gate using a quad-directional implant process using the mask also used for HALO implants of other digital-logic devices on the substrate, while the drain side of the gate is blocked by a resist.
    • 提供了一种制造模拟非对称金属氧化物半导体场效应晶体管(MOSFET)的方法。 该方法可以包括在半导体衬底的有源区上形成在第一方向上取向的第一栅极,在第二有源区上形成垂直于第一栅极延伸的第二栅极,使用双向注入工艺, 第一栅极的漏极侧的HALO掺杂区域以及用于第二栅极的HALO掺杂区域,而第一栅极的源极侧被抗蚀剂覆盖。 另外,该方法可以包括使用四面体注入工艺在第一栅极的源极侧上形成HALO掺杂区域,其使用也用于衬底上的其它数字逻辑器件的HALO注入的掩模,而漏极侧 门被抗蚀剂阻挡。