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    • 2. 发明申请
    • Lithographic apparatus, device manufacturing method and variable attenuator
    • 光刻设备,器件制造方法和可变衰减器
    • US20050206869A1
    • 2005-09-22
    • US10805526
    • 2004-03-22
    • Harm-Jan VoormaAntonius Johannes Van DijsseldonkUwe Mickan
    • Harm-Jan VoormaAntonius Johannes Van DijsseldonkUwe Mickan
    • H01L21/027G03F7/20G03B27/52
    • G03F7/70558
    • A lithographic apparatus includes an illumination system for providing a projection beam of radiation, a support structure for supporting patterning structure for imparting a pattern to the projection beam, a substrate table for holding a wafer and a projection system for projecting the patterned beam onto a target portion of the wafer. In order to permit control of the radiation dose at the wafer so that the throughput of wafers can be optimised, a variable attenuator is provided to vary the intensity of the projection beam while not changing the position of the beam. The variable attenuator comprises two parallel mirrors positioned such that an input beam of radiation is incident on a first of the mirrors by which it is reflected towards a second of the mirrors by which the beam is reflected to produce an output beam of radiation of required intensity for input to the illumination system, and a tilting mechanism for tilting the mirrors such that the mirrors remain parallel to one another and the angles of incidence of the beams on the mirrors are changed so as to vary the intensity of the output beam. This allows the intensity of the projection beam to be varied continuously without changing the position of the beam, whether the input beam is converging, diverging or parallel.
    • 光刻设备包括用于提供投射辐射束的照明系统,用于支撑用于将投影光束赋予图案的图形结构的支撑结构,用于保持晶片的基板台和用于将图案化光束投影到目标上的投影系统 部分晶片。 为了允许控制晶片上的辐射剂量,从而可以优化晶片的生产量,可以提供可变衰减器来改变投影光束的强度,同时不改变光束的位置。 可变衰减器包括两个平行的反射镜,其被定位成使得输入射线束入射在第一反射镜上,通过该反射镜被反射到第二反射镜,通过该反射镜反射光束以产生所需强度的辐射输出束 用于输入到照明系统,以及倾斜机构,用于倾斜反射镜,使得反射镜保持彼此平行,并且改变反射镜上的光束的入射角度,以便改变输出光束的强度。 这允许投影光束的强度连续变化而不改变光束的位置,无论输入光束是会聚,发散还是平行。
    • 4. 发明授权
    • Lithographic apparatus, device manufacturing method and variable attenuator
    • 光刻设备,器件制造方法和可变衰减器
    • US07145640B2
    • 2006-12-05
    • US10805526
    • 2004-03-22
    • Harm-Jan VoormaAntonius Johannes Josephus Van DijsseldonkUwe Mickan
    • Harm-Jan VoormaAntonius Johannes Josephus Van DijsseldonkUwe Mickan
    • G03B27/72G03B27/42G03B27/54
    • G03F7/70558
    • A lithographic apparatus includes an illumination system for providing a projection beam of radiation, a support structure for supporting patterning structure for imparting a pattern to the projection beam, a substrate table for holding a wafer and a projection system for projecting the patterned beam onto a target portion of the wafer. In order to permit control of the radiation dose at the wafer so that the throughput of wafers can be optimised, a variable attenuator is provided to vary the intensity of the projection beam while not changing the position of the beam. The variable attenuator includes two parallel mirrors positioned such that an input beam of radiation is incident on a first of the mirrors by which it is reflected towards a second of the mirrors by which the beam is reflected to produce an output beam of radiation of required intensity for input to the illumination system, and a tilting mechanism for tilting the mirrors such that the mirrors remain parallel to one another and the angles of incidence of the beams on the mirrors are changed so as to vary the intensity of the output beam. This allows the intensity of the projection beam to be varied continuously without changing the position of the beam, whether the input beam is converging, diverging or parallel.
    • 光刻设备包括用于提供投射辐射束的照明系统,用于支撑用于将投影光束赋予图案的图形结构的支撑结构,用于保持晶片的基板台和用于将图案化光束投影到目标上的投影系统 部分晶片。 为了允许控制晶片上的辐射剂量,从而可以优化晶片的生产量,可以提供可变衰减器来改变投射光束的强度,同时不改变光束的位置。 可变衰减器包括两个平行的反射镜,其被定位成使得输入的辐射束入射在第一反射镜上,通过该反射镜被反射到第二反射镜,通过该反射镜反射光束以产生所需强度的辐射输出束 用于输入到照明系统,以及倾斜机构,用于倾斜反射镜,使得反射镜保持彼此平行,并且改变反射镜上的光束的入射角度,以便改变输出光束的强度。 这允许投影光束的强度连续变化而不改变光束的位置,无论输入光束是会聚,发散还是平行。