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    • 75. 发明授权
    • Vertical DRAM punchthrough stop self-aligned to storage trench
    • 垂直DRAM穿透停止自对准到存储沟槽
    • US06777737B2
    • 2004-08-17
    • US10016605
    • 2001-10-30
    • Jack A. MandelmanDureseti ChidambarraoRamachandra Divakaruni
    • Jack A. MandelmanDureseti ChidambarraoRamachandra Divakaruni
    • H01L27108
    • H01L27/10864H01L27/10841H01L27/10885H01L29/66181H01L29/945
    • A semiconductor memory structure having a feature size of less than about 90 nm which exhibits little or no dynamic charge loss and little or no trap assisted junction leakage is provided. Specifically, the semiconductor structure includes at least one back-to-back pair of trench storage memory cells present in a Si-containing substrate. Each memory cell includes a vertical transistor overlaying a trench capacitor. Strap outdiffusions are present on each vertical sidewall of the trench storage memory cells so as to interconnect the vertical transistor and the trench capacitor of each memory cell to the Si-containing substrate. A punchthrough stop doping pocket is located between each back-to-back pair of trench storage memory cells and it is centered between the strap outdiffusions of adjacent storage trenches, and self-aligned to the adjacent storage trenches.
    • 具有小于约90nm的特征尺寸的显示器很少或没有动态电荷损失并且很少或没有陷阱辅助结漏电的半导体存储器结构被提供。 具体地,半导体结构包括存在于含Si衬底中的至少一个背靠背对的沟槽存储存储单元。 每个存储单元包括覆盖沟槽电容器的垂直晶体管。 在沟槽存储单元的每个垂直侧壁上都存在带外扩散,以将每个存储单元的垂直晶体管和沟槽电容器互连到含Si衬底。 穿通阻止掺杂袋位于每个背对背对的沟槽存储存储单元之间,并且其位于相邻存储沟槽的带外扩展之间并且与相邻存储沟槽自对准。
    • 76. 发明授权
    • Reduction of polysilicon stress in trench capacitors
    • 减少沟槽电容器中的多晶硅应力
    • US06653678B2
    • 2003-11-25
    • US09904612
    • 2001-07-13
    • Dureseti ChidambarraoRajarao JammyJack A. Mandelman
    • Dureseti ChidambarraoRajarao JammyJack A. Mandelman
    • H01L27108
    • H01L27/10867
    • A Deep Trench (DT) capacitor in a semiconductor substrate has an isolation collar formed on trench sidewalls above the DT bottom. An outer plate is formed below the collar. Capacitor dielectric is formed on DT walls below the collar. An node electrode is formed in the DT, recessed below the DT top. The collar is recessed in the DT. A combined poly/counter-recrystallizing species cap is formed over the node electrode with a peripheral strap. The cap may be formed after formed a peripheral divot of a recessed collar, followed by forming an intrinsic poly strap in the divot and doping with a counter-recrystallization species, e.g. Ge, into the node electrode and the strap. Alternatively, the node electrode is recessed followed by codeposition of poly and Ge or another counter-recrystallization species to form the cap and strap.
    • 半导体衬底中的深沟槽(DT)电容器具有形成在DT底部上方的沟槽侧壁上的隔离环。 在轴环下形成一个外板。 电容电介质形成在轴环下面的DT壁上。 节点电极形成在DT上,凹陷在DT顶部下方。 衣领凹入DT。 在具有外围带的节点电极上形成组合的聚/反重结晶物质盖。 可以在形成凹陷环的外围边缘之后形成盖,然后在该凹陷中形成本征多晶带并掺杂反相再结晶物质,例如, Ge,进入节点电极和带子。 或者,节点电极凹进,随后聚合和Ge的共沉积或另一种反重结晶物质形成盖和带。
    • 78. 发明授权
    • Self-aligned punch through stop for 6F2 rotated hybrid DRAM cell
    • 6F2旋转混合DRAM单元的自对准穿通停止
    • US06534824B1
    • 2003-03-18
    • US10078926
    • 2002-02-20
    • Jack A. MandelmanDureseti Chidambarrao
    • Jack A. MandelmanDureseti Chidambarrao
    • H01L2976
    • H01L27/10864H01L27/10841H01L27/10876H01L27/10885H01L27/10891
    • A 6F2 memory cell structure and a method of fabricating the same. The memory cell structure includes a plurality of memory cells located in a Si-containing substrate which are arranged in rows and columns. Each memory cell includes a double-gated vertical MOSFET having exposed gate conductor regions and two gates formed on opposing sidewalls of the MOSFETs. The memory cell structure also includes a plurality of wordlines overlaying the double-gated vertical MOSFETs and in contact with the exposed gate conductor regions, and a plurality of bitlines that are orthogonal to the wordlines. Trench isolation regions are located adjacent to the rows of memory cells. The memory cell structure also includes a plurality of punch through stop regions located in the Si-containing substrate and self-aligned to the wordlines and bitlines. A portion of the punch through stop regions overlap each other under the bitlines and each region serves to electrically isolate adjacent buried-strap regions from each other.
    • 6F2存储单元结构及其制造方法。 存储单元结构包括位于含Si衬底中的以行和列排列的多个存储单元。 每个存储单元包括具有暴露的栅极导体区域和形成在MOSFET的相对侧壁上的两个栅极的双门控垂直MOSFET。 存储单元结构还包括覆盖双门控垂直MOSFET并与暴露的栅极导体区域接触的多个字线以及与字线正交的多个位线。 沟槽隔离区位于与存储单元行相邻的位置。 存储单元结构还包括位于含硅衬底中并与字线和位线自对准的多个穿通停止区域。 穿通停止区域的一部分在位线之下彼此重叠,并且每个区域用于将相邻的掩埋区域彼此电隔离。