Patent ID: 8954919
Filing Date: 2015-02-10
Classification: G03F

Abstract:
1. A calculation method for generating a layout pattern in a photomask, comprising: providing a computer system having a computer readable storage device; providing a two-dimensional (2-D) design layout to the computer system, wherein the 2-D design layout comprises a plurality of geometric patterns distributed in a plane; marking portions of the geometric patterns to generate at least one marked geometric pattern and at least one non-marked geometric pattern; moving the marked geometric pattern along an axis orthogonal to the plane so as to convert the 2-D design layout to a three-dimensional (3-D) design layout, wherein the marked geometric pattern and the non-marked geometric pattern of the 3-D design layout are arranged alternately along the axis orthogonal to the plane; and outputting the 3-D design layout to a mask-making system.