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    • 7. 发明申请
    • プラズマエッチング方法及び装置
    • 等离子体蚀刻方法和装置
    • WO2002067313A1
    • 2002-08-29
    • PCT/JP2002/001627
    • 2002-02-22
    • 東京エレクトロン株式会社瀬川 澄江伝宝 一樹石原 博之永関 一也
    • 瀬川 澄江伝宝 一樹石原 博之永関 一也
    • H01L21/3065
    • H01L21/67069H01J37/32082
    • Plasma of an etching gas and a dilute gas is generated between an upper electrode and a lower electrode, and neutral particles, ionized by a charge exchange reaction between ions in the plasma and neutral particles, are implanted into a semiconductor wafer (W) for etching. During etching, a mixture ratio between helium gas and argon gas that are used as the dilute gas is changed according to how a shield ring provided around the upper electrode is used to thereby enhance the in-plane uniformity of an etching rate. A parallel flat-plate etching device which generates plasma of the above etching gas by applying a high-frequency voltage to between first and second electrodes and allowing the etching gas to flow in, and which uses the plasma to etch a semiconductor wafer disposed on the second electrode, wherein the first electrode is so formed as to gradually approach the second electrode as it extends in a radially outward direction to thereby control plasma density distribution characteristics in the radial direction of a substrate to be treated.
    • 在上部电极和下部电极之间产生蚀刻气体和稀释气体的等离子体,并且通过等离子体和中性粒子中的离子之间的电荷交换反应离子化的中性粒子被注入用于蚀刻的半导体晶片(W) 。 在蚀刻期间,根据如何使用设置在上电极周围的屏蔽环来改变用作稀释气体的氦气和氩气之间的混合比,从而提高蚀刻速率的面内均匀性。 一种平行平板蚀刻装置,其通过在第一和第二电极之间施加高频电压并允许蚀刻气体流入并使用等离子体蚀刻设置在第一和第二电极上的半导体晶片,从而产生上述蚀刻气体的等离子体 第二电极,其中第一电极形成为当其沿径向向外的方向延伸时逐渐接近第二电极,从而控制待处理的基板的径向方向上的等离子体密度分布特性。