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    • 63. 发明授权
    • Field-shield-trench isolation for gigabit DRAMs
    • 用于千兆位DRAM的场屏蔽沟槽隔离
    • US06762447B1
    • 2004-07-13
    • US09245269
    • 1999-02-05
    • Jack A. MandelmanRama DivakaruniGiuseppe LarosaUlrike GrueningCarl Radens
    • Jack A. MandelmanRama DivakaruniGiuseppe LarosaUlrike GrueningCarl Radens
    • H01L27108
    • H01L27/10861H01L21/763H01L21/765H01L27/10829H01L27/10897H01L2924/0002H01L2924/00
    • A dynamic random access memory (DRAM) formed in a semiconductor body has individual pairs of memory cells that are isolated from one another by a vertical electrical isolation trench and are isolated from support circuitry. The isolation trench has sidewalls and upper and lower portions, and encircles an area of the semiconductor body which contains the memory cells. This electrically isolates pairs of memory cells from each other and from the support circuitry contained within the semiconductor body but not located within the encircled area. The lower portion of the isolation trench is filled with an electrically conductive material that has sidewall portions thereof which are at least partly separated from the sidewalls of the lower portion of the trench by a first electrical insulator, and that has a lower portion that is in electrical contact with the semiconductor body. The upper portion of the isolation trench is filled with a second electrical insulator.
    • 形成在半导体主体中的动态随机存取存储器(DRAM)具有通过垂直电隔离沟槽彼此隔离并且与支持电路隔离的各对存储单元。 隔离沟槽具有侧壁和上部和下部,并且包围包含存储单元的半导体主体的区域。 这使得存储器单元对彼此和从包含在半导体本体内但不位于包围区域内的支撑电路电隔离。 隔离沟槽的下部填充有导电材料,该导电材料具有其侧壁部分,其侧壁部分通过第一电绝缘体至少部分地与沟槽的下部的侧壁分离,并且其具有位于 与半导体本体电接触。 隔离沟槽的上部填充有第二电绝缘体。
    • 65. 发明授权
    • Method for fabricating a trench capacitor
    • 沟槽电容器的制造方法
    • US06265279B1
    • 2001-07-24
    • US09404906
    • 1999-09-24
    • Carl RadensJack A. MandelmanJoachim Hoepfner
    • Carl RadensJack A. MandelmanJoachim Hoepfner
    • H01L2120
    • H01L27/10861H01L27/10867H01L29/945
    • A trench capacitor, in accordance with the present invention, includes a trench formed in a substrate. The trench has a buried plate formed adjacent to a lower portion of the trench. A dielectric collar is formed along vertical sidewalls of the trench. A node diffusion region is formed adjacent to the trench for connecting to a storage node in the trench. A dopant region is formed laterally outward from the trench and adjacent to the collar, and the dopant region includes a profile having a lower portion extending further laterally outward from the trench than an upper portion of the profile wherein operation of a parasitic transistor formed adjacent to the trench between the node diffusion and the buried plate is disrupted by the dopant region. Methods for forming the dopant region are also disclosed and claimed.
    • 根据本发明的沟槽电容器包括形成在衬底中的沟槽。 沟槽具有邻近沟槽下部形成的掩埋板。 沿着沟槽的垂直侧壁形成介电环。 在沟槽附近形成节点扩散区域,以连接到沟槽中的存储节点。 掺杂剂区域从沟槽横向向外形成并且与套环相邻,并且掺杂剂区域包括轮廓,该轮廓具有比轮廓的上部更远离沟槽进一步横向向外延伸的轮廓,其中形成为邻近 节点扩散和掩埋板之间的沟槽被掺杂剂区域破坏。 还公开并要求保护形成掺杂剂区域的方法。