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    • 54. 发明授权
    • Method for fabricating trench capacitors and semiconductor device with trench capacitors
    • 制造沟槽电容器的方法和具有沟槽电容器的半导体器件
    • US06878600B2
    • 2005-04-12
    • US10436426
    • 2003-05-12
    • Albert BirnerMatthias GoldbachMartin Franosch
    • Albert BirnerMatthias GoldbachMartin Franosch
    • H01L21/3063H01L21/8242H01L27/108H01L21/20
    • H01L27/1087
    • A method for fabricating trench capacitors having trenches with mesopores, the trench capacitors being suitable both for discrete capacitors and for integrated semiconductor memories, significantly increases the surface area for electrodes of the capacitors and, hence, the capacitance thereof. The mesopores, which are small woodworm-hole-like channels having diameters from approximately 2 to 50 nm, are fabricated electrochemically. It is, thus, possible to produce capacitances with a large capacitance-to-volume ratio. Growth of the mesopores stops, at the latest, when the mesopores reach a minimum distance from another mesopore or adjacent trench (self-passivation). As such, the formation of “short circuits” between two adjacent mesopores can be avoided in a self-regulated manner. Furthermore, a semiconductor device is provided including at least one trench capacitor on the front side of a semiconductor substrate fabricated by the method according to the invention.
    • 一种用于制造具有中孔的沟槽的沟槽电容器的方法,所述沟槽电容器适用于分立电容器和集成半导体存储器,显着增加了电容器的电极的表面积,并因此显着增加了其电容。 电化学地制造直径为约2〜50nm的小木蛾孔状通道的中孔。 因此,可以产生具有大的电容容积比的电容。 当介孔达到与另一个中孔或相邻沟槽的最小距离(自钝化)时,介孔的生长最终停止。 因此,可以以自我调节的方式避免在两个相邻介孔之间形成“短路”。 此外,提供一种半导体器件,其包括通过根据本发明的方法制造的半导体衬底的前侧上的至少一个沟槽电容器。