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    • 2. 发明授权
    • Mask pattern correction process, photomask and semiconductor integrated circuit device
    • 掩模图案校正工艺,光掩模和半导体集成电路器件
    • US06303251B1
    • 2001-10-16
    • US09360989
    • 1999-07-27
    • Kiyohito MukaiHidenori ShibataHiroyuki Tsujikawa
    • Kiyohito MukaiHidenori ShibataHiroyuki Tsujikawa
    • G03F900
    • G03F7/70441G03F1/36
    • In order that CAD processing time required for modifying an input design pattern to compensate for optical proximity effects is reduced, increases in the number of base shapes when corrected data are converted into EB data are restricted, and false detection of defects in a photomask inspection process is restricted, the following steps are taken. At a shape selection step, rectangular shapes are divided into a dense rectangular shape group and a non-dense rectangular shape group according to the distance of each rectangular shape to an adjacent rectangular shape. At a number-of-shapeas comparison step, the number of shapes included in the dense rectangular shape group is compared to the number of shapes included in the non-dense rectangular shape group to select either shape group for correction. At a correction process selection step, a correction process suited for the selected shape group is selected. At a shape correction step, optical proximity correction is made. At a shape combining step, a group of corrected shapes and the rectangular shape group different from the selected one are combined.
    • 为了减少修改输入设计图案以补偿光学邻近效应所需的CAD处理时间,校正数据被转换为EB数据时的基本形状数量的增加受到限制,并且光掩模检查过程中的缺陷的错误检测 被限制,采取以下步骤。 在形状选择步骤中,矩形形状根据每个矩形形状与相邻矩形形状的距离被分成致密矩形形状组和非密集矩形形状组。 在数字形状比较步骤中,将包含在密集矩形形状组中的形状的数量与包括在非致密矩形形状组中的形状的数量进行比较,以选择用于校正的形状组。 在校正处理选择步骤中,选择适合所选择的形状组的校正处理。 在形状校正步骤中,进行光学邻近校正。 在形状组合步骤中,组合一组校正形状和与所选择的形状组不同的矩形形状组合。