Patent ID: 7678510
Filing Date: 2010-03-16
Classification: G03F

Abstract:
1. A mask for exposure, comprising: a transparent substrate having a first concave portion in a device region and a second concave portion in a monitor region; two first light-shielding device patterns, which are formed on said transparent substrate in said device region at a first gap and severally extend from the both sides of said first concave portion over the first concave portion, and at least one of the first light-shielding device patterns is not in contact with the first concave portion; a second light-shielding device pattern, which is formed on a flat surface of said transparent substrate in said device region at a second gap from said first light-shielding device pattern; two first light-shielding monitor patterns for measuring a phase difference of an exposure light, where the first light-shielding monitor patterns are formed on said transparent substrate in said monitor region at a third gap wider than said first gap and severally extend from the both sides of said second concave portion over the second concave portion, and at least one of the first light-shielding monitor patterns is not in contact with the second concave portion; and a second light-shielding monitor pattern for measuring the phase difference of the exposure light, where the second light-shielding monitor pattern is formed on a flat surface of said transparent substrate in said monitor region at a fourth gap wider than said second gap from said first light-shielding monitor pattern, wherein a width of said first light-shielding monitor pattern is equal to or less than a width of said first light-shielding device pattern.