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    • 9. 发明授权
    • 전자석이 설치된 노광장치
    • 步进电机
    • KR100861199B1
    • 2008-09-30
    • KR1020070080175
    • 2007-08-09
    • 주식회사 디비하이텍
    • 하보현
    • H01L21/027
    • H01L21/0274G03F7/70708
    • An exposure apparatus including an electromagnet is provided to improve resolution and a DOF(Depth Of Focus) margin by generating magnetic field in a space between a lens and a wafer. An exposure apparatus includes a magnetic body(32). The magnetic body has a circular structure. The magnetic body is installed around a lens and a wafer within a focal distance between the lens and the wafer in order to generate magnetic field within the focal distance. The magnetic body is composed of an electromagnet for controlling the intensity of the magnetic field in order to adjust arbitrarily a refractive index of a space between the lens and the wafer. The magnetic field is formed in the focal distance between the lens and the wafer by applying the current to the electromagnet while light of a light source penetrates the lens. A control unit(40) controls the current applied to the electromagnet.
    • 提供包括电磁体的曝光装置,以通过在透镜和晶片之间的空间中产生磁场来提高分辨率和DOF(聚焦深度)余量。 曝光装置包括磁体(32)。 磁体具有圆形结构。 在透镜和晶片之间的焦距范围内,将磁体安装在透镜和晶片周围,以便在焦距内产生磁场。 磁体由用于控制磁场强度的电磁体组成,以便任意地调整透镜和晶片之间的空间的折射率。 当光源透过透镜时,通过将电流施加到电磁体,在透镜和晶片之间的焦距中形成磁场。 控制单元(40)控制施加到电磁体的电流。