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    • 44. 发明授权
    • Substrate etching method
    • 基板蚀刻方法
    • US09478439B2
    • 2016-10-25
    • US14646909
    • 2013-11-01
    • BEIJING NMC CO., LTD.
    • Zhongwei Jiang
    • H01L21/302H01L21/3213H01L21/3065B81C1/00
    • H01L21/32137B81C1/00531B81C2201/0112B81C2201/0132H01L21/30655
    • Embodiments of the invention provide a substrate etching method, which includes: a deposition operation for depositing a polymer on a side wall of a silicon groove, an etching operation for etching the side wall of the silicon groove, and repeating the deposition operation and the etching operation at least twice. In the process of completing all cycles of the etching operation, a chamber pressure of a reaction chamber is decreased from a preset highest pressure to a preset lowest pressure according to a preset rule. The substrate etching method, according to various embodiments of the invention, avoid the problem of damaging the side wall, thereby making the side wall smooth.
    • 本发明的实施例提供了一种基板蚀刻方法,其包括:用于在硅槽的侧壁上沉积聚合物的沉积操作,用于蚀刻硅槽的侧壁的蚀刻操作,以及重复沉积操作和蚀刻 操作至少两次。 在完成蚀刻操作的所有循环的过程中,根据预设规则,反应室的室压力从预设的最高压力降低到预设的最低压力。 根据本发明的各种实施例的基板蚀刻方法避免了损坏侧壁的问题,从而使侧壁平滑。