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    • 24. 发明授权
    • Damascene gate multi-mesa MOSFET
    • 镶嵌门多台面MOSFET
    • US07081387B2
    • 2006-07-25
    • US10918949
    • 2004-08-16
    • Toshiharu FurukawaJack A. MandelmanByeongju Park
    • Toshiharu FurukawaJack A. MandelmanByeongju Park
    • H01L21/336
    • H01L29/785H01L21/84H01L27/1203H01L29/4908H01L29/66795H01L29/78621H01L29/78636
    • A multi-mesa FET structure with doped sidewalls for source/drain regions and methods for forming the same are disclosed. The exposure of the source and drain sidewalls during the manufacture enables uniform doping of the entire sidewalls especially when geometry-independent doping methods, such as gas phase doping or plasma doping, is used. The resulting device has depth independent and precisely controlled threshold voltage and current density and can have very high current per unit area of silicon as the mesas can be very high compared with mesas that could be formed in prior arts. Methods of providing multi-mesa FET structures are provided which employ either a damascene gate process or a damascene replacement gate process instead of conventional subtractive etching methods.
    • 公开了具有用于源极/漏极区域的掺杂侧壁的多台面FET结构及其形成方法。 在制造期间,源极和漏极侧壁的曝光使得能够均匀地掺杂整个侧壁,特别是当使用几何不依赖的掺杂方法,例如气相掺杂或等离子体掺杂时。 所得到的器件具有深度独立和精确控制的阈值电压和电流密度,并且由于台面与现有技术中可能形成的台面相比可以非常高,所以每单位面积的硅可以具有非常高的电流。 提供了提供多台面FET结构的方法,其采用镶嵌栅极工艺或镶嵌栅极替代栅极工艺,而不是常规的减去蚀刻方法。
    • 27. 发明授权
    • Vertical DRAM cell with wordline self-aligned to storage trench
    • 垂直DRAM单元与字线自对准到存储沟槽
    • US6153902A
    • 2000-11-28
    • US374687
    • 1999-08-16
    • Toshiharu FurukawaUlrike GrueningDavid V. HorakJack A. MandelmanCarl J. RadensThomas S. Rupp
    • Toshiharu FurukawaUlrike GrueningDavid V. HorakJack A. MandelmanCarl J. RadensThomas S. Rupp
    • H01L27/108H01L21/8242H01L29/78H01L33/00
    • H01L27/10864H01L27/10876H01L27/10891
    • A dynamic random access memory (DRAM) device. The DRAM device is formed in a substrate having a top surface and a trench with a sidewall formed in the substrate. A signal storage node is formed using a bottom portion of the trench and a signal transfer device is formed using an upper portion of the trench. The signal transfer device includes a first diffusion region coupled to the signal storage node and extending from the sidewall of the trench into the substrate, a second diffusion region formed in the substrate adjacent to the top surface of the substrate and adjacent the sidewall of the trench, a channel region extending along the sidewall of the trench between the first diffusion region and the second diffusion region, a gate insulator formed along the sidewall of the trench extending from the first diffusion region to the second diffusion region, a gate conductor filling the trench and having a top surface, and a wordline having a bottom adjacent the top surface of the gate conductor and a side aligned with the sidewall of the trench.
    • 动态随机存取存储器(DRAM)设备。 DRAM器件形成在具有顶表面的衬底和具有形成在衬底中的侧壁的沟槽中。 使用沟槽的底部形成信号存储节点,并且使用沟槽的上部形成信号传送装置。 信号传送装置包括耦合到信号存储节点并从沟槽的侧壁延伸到衬底中的第一扩散区域,形成在衬底中邻近衬底的顶表面并邻近沟槽的侧壁的第二扩散区域 沿着沟槽的侧壁在第一扩散区域和第二扩散区域之间延伸的沟道区域,沿着从第一扩散区域延伸到第二扩散区域的沟槽的侧壁形成的栅极绝缘体,填充沟槽的栅极导体 并且具有顶表面和字线,其具有邻近栅极导体的顶表面的底部和与沟槽的侧壁对准的一侧。