Patent ID: 9268210
Filing Date: 2016-02-23
CPC Classification: G03F

Claim Text:
1. A double-exposure mask structure, comprising: a first section configured and positioned to pattern a central region of a substrate and comprising parallel mask structures and additional parallel mask structures perpendicularly intersecting the parallel mask structures; a second section configured and positioned to pattern a margin region of the substrate adjacent the central region of the substrate and comprising parallel marginal auxiliary mask structures oriented parallel to the parallel mask structures of the first section; a third section between the first section and the second section and configured and positioned to pattern an intersection between the central region of the substrate and the marginal region of the substrate; and a fourth section between the first section and the third section and comprising discrete auxiliary mask structures arranged in a line oriented parallel to the parallel mask structures of the first section, each of the discrete auxiliary mask structures independently overlying one or two of the additional parallel mask structures of the first section.