Patent ID: 8436402

Claim:
An exposure mask comprising: a first transmission region including a plurality of dots, having substantially an identical area through which light is shielded or transmitted, arrayed into a matrix form having rows and columns, the first transmission region having a first length in the row direction of the matrix form; and a second transmission region including a plurality of dots, having substantially an identical area through which the light is shielded or transmitted, arrayed into a matrix form having rows and columns, the second transmission region disposed adjacent to the first transmission region, the area of the dots arrayed in the second transmission region being greater than the area of the dots arrayed in the first transmission region, the second transmission region having a second length in the row direction of the matrix form, wherein the dots arrayed in a column of the first transmission region, which is adjacent to the second transmission region, have an area intermediate between areas of dots arrayed on both sides of the column, and the dots arrayed in the column of the first transmission region form a transient region having a length smaller than the length of the first region except for the transient region or the second transmission region.