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    • 80. 发明授权
    • Liquid-filled balloons for immersion lithography
    • 用于浸没式光刻的充满液体的气球
    • US07026259B2
    • 2006-04-11
    • US10707894
    • 2004-01-21
    • Mark C. HakeyDavid V. HorakCharles W. Koburger, IIIPeter H. Mitchell
    • Mark C. HakeyDavid V. HorakCharles W. Koburger, IIIPeter H. Mitchell
    • H01L21/26G06F17/50G03B27/42
    • G03F7/70341Y10S438/947
    • A liquid-filled balloon may be positioned between a workpiece, such as a semiconductor structure covered with a photoresist, and a lithography light source. The balloon includes a thin membrane that exhibits good optical and physical properties. Liquid contained in the balloon also exhibits good optical properties, including a refractive index higher than that of air. Light from the lithography light source passes through a mask, through a top layer of the balloon membrane, through the contained liquid, through a bottom layer of the balloon membrane, and onto the workpiece where it alters portions of the photoresist. As the liquid has a low absorption and a higher refractive index than air, the liquid-filled balloon system enhances resolution. Thus, the balloon provides optical benefits of liquid immersion without the complications of maintaining a liquid between (and in contact with) a lithographic light source mechanism and workpiece.
    • 液体填充的球囊可以位于诸如被光致抗蚀剂覆盖的半导体结构的工件和光刻光源之间。 气球包括显示出良好的光学和物理性质的薄膜。 包含在气囊中的液体也表现出良好的光学性能,包括折射率高于空气的折射率。 来自光刻光源的光通过球囊膜的顶层通过所包含的液体通过球囊膜的底层,并穿过其上改变部分光致抗蚀剂的工件。 由于液体具有比空气低的吸收和较高的折射率,所以充满液体的球囊系统提高了分辨率。 因此,气囊提供液体浸没的光学优点,而没有在平版印刷光源机构和工件之间(并与之接触)之间保持液体的并发症。