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    • 41. 发明申请
    • METHOD AND DEVICE FOR WRITING PHOTOMASKS WITH REDUCED MURA ERRORS
    • 用减少MURA错误写入光子的方法和装置
    • WO2014140047A2
    • 2014-09-18
    • PCT/EP2014054750
    • 2014-03-11
    • MICRONIC MYDATA AB
    • SANDSTRÖM TORBJÖRN
    • G03F1/42
    • G03F1/42G03F1/76G03F7/70358G03F7/70383G03F7/704G03F7/70425G03F7/70466G03F7/70583G03F7/70775G03F9/7011G03F9/708
    • The problem of mura in large area photomasks is solved or at least reduced by setting up a writing system to write a pattern with high accuracy and with the optical axes essentially parallel to the movement axes of the stage, then writing photomasks in two passes with the substrate rotated to different angles on the stage. The angle between the orientation of the first and second pass is larger than about 10 degrees, larger than about 20 degrees or larger than about 35 degrees and it can be approximately 10 degrees, approximately 50 degrees, approximately 60 degrees or approximately 90 degrees. The substrate is physically rotated on the stage and aligned with high accuracy after the rotation and the data driving the first and second exposure passes are derived from the first input data specification but processed according to the known oblique angles, so that the second pass is accurately overlaid on the first pass.
    • 通过设置写入系统以高精度写入图案并且光轴基本上平行于平台的移动轴来解决或至少减少了大面积光掩模中的mura的问题,然后将光掩模写入两次通过中 衬底在舞台上旋转到不同的角度。 第一和第二通过的取向之间的角度大于约10度,大于约20度或大于约35度,并且其可以为大约10度,大约50度,大约60度或大约90度。 衬底物理地在舞台上旋转并且在旋转之后以高精度对准并且数据驱动第一和第二曝光通过从第一输入数据规范导出,但是根据已知的倾斜角度进行处理,使得第二遍准确 重叠在第一遍。