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    • 7. 发明授权
    • Structure and process for compact cell area in a stacked capacitor cell array
    • 叠层电容器阵列中紧凑单元面积的结构和工艺
    • US06455886B1
    • 2002-09-24
    • US09636564
    • 2000-08-10
    • Jack A. MandelmanRamachandra DivakaruniCarl J. Radens
    • Jack A. MandelmanRamachandra DivakaruniCarl J. Radens
    • H01L27108
    • H01L27/10876H01L27/10808H01L27/10823H01L27/10885H01L27/10891H01L27/10894H01L29/66181
    • A method for forming, and a structure for a semiconductor device having vertically-oriented transistors connected to stacked capacitor cells, wherein a contact area for the capacitors enables a compact cell. A vertically-oriented transistor is formed in a trough in a substrate above a buried bit line. The gate conductor may be formed in the trough above the buried bit line, with source and drain diffusions spaced along a sidewall of the trough. Isolation regions are formed in the semiconductor substrate to isolate the transistors. Word lines are formed above the surface of the semiconductor substrate in a direction perpendicular to the direction of the buried bit lines. A capacitor contact is formed above the surface of the semiconductor substrate at a contact area of an active region between adjacent word lines. The active region is rhomboid in shape, enabling a low capacitor contact resistance, a small bit line and word line pitch, and consequently, a compact capacitor cell.
    • 一种用于形成的方法,以及具有连接到层叠电容器单元的垂直取向的晶体管的半导体器件的结构,其中电容器的接触面积使得能够实现紧凑的电池。 垂直取向的晶体管形成在掩埋位线上方的衬底的槽中。 栅极导体可以形成在掩埋位线上方的槽中,源极和漏极扩散沿着槽的侧壁间隔开。 在半导体衬底中形成隔离区以隔离晶体管。 在与掩埋位线的方向垂直的方向上在半导体衬底的表面上形成字线。 在相邻字线之间的有源区域的接触区域处,在半导体衬底的表面上方形成电容器触点。 有源区域是菱形形状,能够实现低电容器接触电阻,小位线和字线间距,从而实现紧凑的电容器单元。
    • 9. 发明授权
    • Vertical MOSFET
    • 垂直MOSFET
    • US06414347B1
    • 2002-07-02
    • US09790011
    • 2001-02-09
    • Ramachandra DivakaruniHeon LeeJack A. MandelmanCarl J. RadensJai-Hoon Sim
    • Ramachandra DivakaruniHeon LeeJack A. MandelmanCarl J. RadensJai-Hoon Sim
    • H01L2972
    • H01L27/10864H01L21/2255H01L21/26586H01L27/10841H01L29/66666H01L29/7827
    • An improved process for making a vertical MOSFET structure comprising: A method of forming a semiconductor memory cell array structure comprising: providing a vertical MOSFET DRAM cell structure having a deposited gate conductor layer planarized to a top surface of a trench top oxide on the overlying silicon substrate; forming a recess in the gate conductor layer below the top surface of the silicon substrate; implanting N-type dopant species through the recess at an angle to form doping pockets in the array P-well; depositing an oxide layer into the recess and etching said oxide layer to form spacers on sidewalls of the recess; depositing a gate conductor material into said recess and planarizing said gate conductor to said top surface of the trench top oxide.
    • 一种用于制造垂直MOSFET结构的改进方法,包括:一种形成半导体存储单元阵列结构的方法,包括:提供垂直MOSFET DRAM单元结构,其具有平坦化到覆盖硅上的沟槽顶部氧化物的顶表面的沉积栅极导体层 基质; 在所述硅衬底的顶表面下方的所述栅极导体层中形成凹部; 以一定角度注入N型掺杂剂物质通过凹槽形成阵列P-阱中的掺杂凹坑; 将氧化物层沉积到所述凹部中并蚀刻所述氧化物层以在所述凹部的侧壁上形成间隔物; 将栅极导体材料沉积到所述凹部中并将所述栅极导体平坦化到所述沟槽顶部氧化物的所述顶表面。