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    • 1. 发明授权
    • Bipolar transistor with a collector having a protected outer edge portion for reduced based-collector junction capacitance and a method of forming the transistor
    • 具有集电器的双极晶体管具有受保护的外边缘部分,用于降低基极集电极结电容,以及形成晶体管的方法
    • US08546230B2
    • 2013-10-01
    • US13296496
    • 2011-11-15
    • James W. AdkissonDavid L. HarameRobert K. LeidyQizhi Liu
    • James W. AdkissonDavid L. HarameRobert K. LeidyQizhi Liu
    • H01L21/331H01L29/66
    • H01L29/732H01L29/7371
    • Disclosed are embodiments of a transistor (e.g., bipolar junction transistor (BJT) or a heterojunction bipolar transistor (HBT)) and a method of forming the transistor with a collector region having a protected upper edge portion for reduced base-collector junction capacitance Cbc. In the embodiments, a collector region is positioned laterally adjacent to a trench isolation region within a substrate. Mask layer(s) cover the trench isolation region and further extend laterally onto the edge portion of the collector region. A first section of an intrinsic base layer is positioned above a center portion of the collector region and a second section of the intrinsic base layer is positioned above the mask layer(s). During processing these mask layer(s) prevent divot formation in the upper corner of the trench isolation region at the isolation region-collector region interface and further limit dopant diffusion from a subsequently formed raised extrinsic base layer into the collector region.
    • 公开了晶体管(例如双极结型晶体管(BJT)或异质结双极晶体管(HBT))的实施例以及形成具有集电极区域的晶体管的方法,该集电极区域具有用于还原的基极 - 集电极结电容Cbc的受保护的上边缘部分。 在实施例中,集电极区域位于衬底内侧向与沟槽隔离区域相邻的位置。 掩模层覆盖沟槽隔离区域并且进一步横向延伸到收集器区域的边缘部分上。 本征基极层的第一部分位于集电极区域的中心部分的上方,并且本征基极层的第二部分位于掩模层之上。 在处理期间,这些掩模层防止在隔离区域 - 集电极区界面处的沟槽隔离区的上角部形成裂缝,并且进一步限制从随后形成的凸起的外在基极层到集电极区域的掺杂剂扩散。
    • 2. 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。
    • 3. 发明申请
    • TRANSISTOR HAVING A NARROW IN-SUBSTRATE COLLECTOR REGION FOR REDUCED BASE-COLLECTOR JUNCTION CAPACITANCE AND A METHOD OF FORMING THE TRANSISTOR
    • 具有用于减少基极集电极结电容的窄层内基板收集器区域的晶体管和形成晶体管的方法
    • US20130214275A1
    • 2013-08-22
    • US13401064
    • 2012-02-21
    • James W. AdkissonDavid L. HarameQizhi Liu
    • James W. AdkissonDavid L. HarameQizhi Liu
    • H01L29/737H01L21/331
    • H01L29/732H01L29/1004H01L29/66234H01L29/66242H01L29/7371
    • Disclosed are a transistor (e.g., bipolar junction transistor (BJT) or a heterojunction bipolar transistor (HBT)) and a method of forming the transistor with a narrow in-substrate collector region for reduced base-collector junction capacitance. The transistor has, within a substrate, a collector region positioned laterally adjacent to a trench isolation region. A relatively thin seed layer covers the trench isolation region and collector region. This seed layer has a monocrystalline center, which is aligned above and wider than the collector region (e.g., due to a solid phase epitaxy regrowth process), and a polycrystalline outer section. An intrinsic base layer is epitaxially deposited on the seed layer such that it similarly has a monocrystalline center section that is aligned above and wider than the collector region. An extrinsic base layer is the intrinsic base layer and has a monocrystalline extrinsic base-to-intrinsic base link-up region that is offset vertically from the collector region.
    • 公开了晶体管(例如,双极结型晶体管(BJT)或异质结双极晶体管(HBT))以及形成具有窄的衬底内集电极区域以减小基极 - 集电极结电容的晶体管的方法。 晶体管在衬底内具有位于横向邻近沟槽隔离区域的集电极区域。 相对薄的种子层覆盖沟槽隔离区域和收集器区域。 该晶种层具有单晶中心,该晶体中心在集电极区域上方(例如由于固相外延再生长工艺)而上方且更宽,并且多晶外部部分。 本征基底层外延沉积在种子层上,使得其类似地具有在集电极区域上方并且更宽的单晶中心部分。 非本征基层是本征基层,并且具有从集电极垂直偏移的单晶非本征基本至本征基极连接区域。
    • 4. 发明授权
    • Transistor having a monocrystalline center section and a polycrystalline outer section, and narrow in-substrate collector region for reduced base-collector junction capacitance
    • 具有单晶中心部分和多晶外部部分的晶体管,以及用于降低的基极 - 集电极结电容的窄的衬底内集电极区域
    • US08786051B2
    • 2014-07-22
    • US13401064
    • 2012-02-21
    • James W. AdkissonDavid L. HarameQizhi Liu
    • James W. AdkissonDavid L. HarameQizhi Liu
    • H01L21/02
    • H01L29/732H01L29/1004H01L29/66234H01L29/66242H01L29/7371
    • Disclosed are a transistor (e.g., bipolar junction transistor (BJT) or a heterojunction bipolar transistor (HBT)) and a method of forming the transistor with a narrow in-substrate collector region for reduced base-collector junction capacitance. The transistor has, within a substrate, a collector region positioned laterally adjacent to a trench isolation region. A relatively thin seed layer covers the trench isolation region and collector region. This seed layer has a monocrystalline center, which is aligned above and wider than the collector region (e.g., due to a solid phase epitaxy regrowth process), and a polycrystalline outer section. An intrinsic base layer is epitaxially deposited on the seed layer such that it similarly has a monocrystalline center section that is aligned above and wider than the collector region. An extrinsic base layer is the intrinsic base layer and has a monocrystalline extrinsic base-to-intrinsic base link-up region that is offset vertically from the collector region.
    • 公开了晶体管(例如,双极结型晶体管(BJT)或异质结双极晶体管(HBT))以及形成具有窄的衬底内集电极区域以减小基极 - 集电极结电容的晶体管的方法。 晶体管在衬底内具有位于横向邻近沟槽隔离区域的集电极区域。 相对薄的种子层覆盖沟槽隔离区域和收集器区域。 该晶种层具有单晶中心,该晶体中心在集电极区域上方(例如由于固相外延再生长工艺)而上方且更宽,并且多晶外部部分。 本征基底层外延沉积在种子层上,使得其类似地具有在集电极区域上方并且更宽的单晶中心部分。 非本征基层是本征基层,并且具有从集电极垂直偏移的单晶非本征基本至本征基极连接区域。