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    • 4. 发明授权
    • Reducing implant degradation in tilted implantations by shifting implantation masks
    • 通过移植植入掩模减少倾斜植入中的植入物退化
    • US07977225B2
    • 2011-07-12
    • US12417978
    • 2009-04-03
    • Andre PoockJan Hoentschel
    • Andre PoockJan Hoentschel
    • H01L21/425
    • H01L21/823814H01L21/823807Y10S438/942Y10S438/944
    • In extremely scaled semiconductor devices, an asymmetric transistor configuration may be established on the basis of tilted implantation processes with increased resist height and/or tilt angles during tilted implantation processes by providing an asymmetric mask arrangement for masked transistor elements. For this purpose, the implantation mask may be shifted by an appropriate amount so as to enhance the overall blocking effect for the masked transistors while reducing any shadowing effect of the implantation masks for the non-masked transistors. The shift of the implantation masks may be accomplished by performing the automatic alignment procedure on the basis of “shifted” target values or by providing asymmetrically arranged photolithography masks.
    • 在非常规模的半导体器件中,可以通过提供用于被掩模的晶体管元件的不对称掩模布置,在倾斜注入工艺期间,在倾斜注入工艺的基础上,增加抗蚀剂高度和/或倾斜角度来建立非对称晶体管配置。 为此,可以将注入掩模移动适当的量,以便增强掩模晶体管的总体阻塞效应,同时减少非掩蔽晶体管的注入掩模的任何阴影效应。 注入掩模的移位可以通过基于“移位的”目标值执行自动对准过程或通过提供不对称布置的光刻掩模来实现。