公开(公告)号：US09395622B2

公开(公告)日：2016-07-19

申请号：US14185506

申请日：2014-02-20

Applicant: GLOBALFOUNDRIES INC.

Inventor： Tadanobu Inoue ,  David O. Melville ,  Alan E. Rosenbluth ,  Masaharu Sakamoto ,  Kehan Tian

IPC: G06F17/50 ,  G03F7/00 ,  G03F1/36 ,  G03F1/70 ,  G03F7/20

CPC classification number: G03F7/00 ,  G03F1/36 ,  G03F1/70 ,  G03F7/70125 ,  G03F7/70425 ,  G03F7/70433 ,  G06F17/50 ,  G06F2217/12

Abstract: In one embodiment, a source mask optimization (SMO) method is provided that includes controlling bright region efficiency during at least one optical domain step. The bright region efficiency being the proportion of the total transmitted light that is transferred to bright areas of a target pattern. The optical domain intermediate solution provided by the at least one optical domain step may then be binarized to obtain an initial spatial domain solution with a controlled MEEF (Mask Error Enhancement Factor). The MEEF is controlled during at least one spatial domain step that optimizes the initial spatial domain solution.

Abstract translation: 在一个实施例中，提供了一种源掩码优化（SMO）方法，其包括在至少一个光域步骤期间控制亮区效率。 亮区效率是传输到目标图形的明亮区域的总透射光的比例。 然后可以将由至少一个光学域步骤提供的光域中间溶液二值化以获得具有受控MEEF（掩模误差增强因子）的初始空间域解。 在至少一个优化初始空间域解决方案的空间域步骤中控制MEEF。