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    • 1. 发明专利
    • FLUID CONTROL VALVE
    • GB1280765A
    • 1972-07-05
    • GB1175270
    • 1970-03-11
    • WALTON GEORGE WORTH
    • WALTON GEORGE WORTH
    • F04B53/10F16K1/38
    • 1280765 Valves G W WALTON 11 March 1970 [2 Oct 1969] 11752/70 Heading F2V Check valve for the inlet or outlet of a piston type pump, comprises a metal seat ring 4 having a seating surface 9, and a resilient seal ring 19 e.g. of rubber or rubber-like material located in an external relief groove 18 in the seat ring. The seal ring presents a seating surface 20 which stands proud of the seating surface 9 and a closure member 7 co-operates with both seating surfaces. The inner periphery of the seal ring has an interfitting engagement with the seat ring, as by projecting bead 23 and groove 24. The seal ring is retained by a metal ring 25 fitted to a conforming groove 26 in the seat ring. As shown, there are two retaining rings of circular section. In a modification, Fig. 3 (not shown), the retaining rings are of square section with rounded corners, and the bead 23 is V-shaped. The seal ring is preferably reversible end-forend.
    • 4. 发明申请
    • METHOD FOR PATTERNING A SEMICONDUCTOR REGION
    • 用于绘制半导体区域的方法
    • US20050260859A1
    • 2005-11-24
    • US10709673
    • 2004-05-21
    • Sadanand DeshpandeRajiv RanadeGeorge Worth
    • Sadanand DeshpandeRajiv RanadeGeorge Worth
    • H01L21/28H01L21/3213H01L21/461H01L29/49
    • H01L21/28035H01L21/32137H01L29/4925
    • A method is provided for patterning a semiconductor region, which can be heavily doped. A patterned mask is provided above the semiconductor region. A portion of the semiconductor region exposed by the patterned mask is etched in an environment including a polymerizing fluorocarbon, e.g., a chlorine-free fluorocarbon having a high ratio of carbon to fluorine atoms, and at least one non-polymerizing substance selected from the group consisting of non-polymerizing fluorocarbons, e.g. those having a low ratio of carbon to fluorine atoms, and hydrogenated fluorocarbons. The method preferably passivates the sidewalls of the patterned semiconductor region, such that a lower region of semiconductor material below the patterned region can be directionally etched without eroding the thus passivated patterned region.
    • 提供了可以重掺杂的半导体区域图形化的方法。 在半导体区域上方设置图案化掩模。 通过图案化掩模曝光的半导体区域的一部分在包括聚合碳氟化合物,例如碳与氟原子比高的无氯碳氟化合物的环境中被蚀刻,以及至少一种选自下组的非聚合物质 由非聚合碳氟化合物组成,例如 碳与氟原子比低的氢化碳氟化合物。 该方法优选地钝化图案化的半导体区域的侧壁,使得可以在图案化区域下方的半导体材料的下部区域被定向蚀刻,而不会侵蚀如此钝化的图案化区域。