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    • 8. 发明公开
    • Process for producing a silicon single crystal by Czochralski method
    • Verfahren zur Herstellung eines Silizium-Einkristalls手套Czochralski-Verfahren
    • EP0949359A1
    • 1999-10-13
    • EP99302272.2
    • 1999-03-24
    • SHIN-ETSU HANDOTAI COMPANY LIMITED
    • Iino, Eiichi, Shin-Etsu Handotai Company Ltd.
    • C30B15/36C30B15/00C30B29/06
    • C30B29/06C30B15/36
    • There is disclosed a method for producing a silicon single crystal which comprises preparing a silicon seed crystal having a sharp tip end, and melting down a part of the silicon seed crystal from a tip end to a position having a predetermined thickness, followed by performing a necking operation to form a tapered necking part and a neck portion, and subsequently pulling a single crystal ingot after increasing a diameter, characterized in that said part to be melted down is a part from a tip end to a position in which a diameter A is 1.1 to 2 times the diameter B of the neck portion to be formed; said necking operation is then performed in such a way that a tapered necking part in the shape of a cone is formed at an early stage thereof by pulling a crystal with gradually decreasing a diameter to a minimum diameter of 5 mm or more, and then a neck portion is formed; and subsequently the single crystal ingot is pulled after being increased in a diameter.
      There can be provided a method of producing a silicon single crystal ingot which enables growing of single crystal ingot without lowering a rate of success in making a crystal dislocation free in the case that a thick neck is formed, and thereby improves productivity of a heavy silicon single crystal having a large diameter.
    • 公开了一种制造硅单晶的方法,其包括制备具有尖端尖端的硅晶种,并将一部分硅晶种从尖端熔化到具有预定厚度的位置,然后进行 缩颈操作以形成锥形颈缩部分和颈部,随后在增加直径之后拉动单晶锭,其特征在于,所述要熔化的部分是从尖端到直径A为 要形成的颈部直径B的1.1〜2倍; 然后进行颈缩操作,使得通过将直径逐渐减小至最小直径为5mm以上的晶体,在其早期形成锥体形状的锥形颈缩部,然后将 颈部形成; 然后在直径增加之后拉出单晶锭。 可以提供一种制造单晶锭的方法,其能够在形成厚的颈部的情况下不降低成形时的成形率,从而提高重质硅的生产率,从而能够生长单晶锭 具有大直径的单晶。