Patent ID: 7348107

Claim:
A reticle, comprising: a circuit pattern; an alignment mark; a light blocking region of a width d formed between the circuit pattern and the alignment mark and around an outside periphery of the circuit pattern, wherein the width d of the light blocking film satisfies a relation d ≤ 2 ⁢ t · tan ⁢ { sin - 1 ⁡ ( n 1 n 2 ⁢ ⁢ sin ⁢ ⁢ θ ) } where n 1 is a refractive index of a medium at a light entrance side of the reticle, n 2 is a refractive index of the reticle, t is a thickness of the reticle, and θ is an incidence angle of light upon the reticle; and an anti-reflection film formed on a back face of the reticle remote from a front face of the reticle where the circuit pattern, the light blocking region and the alignment mark are formed.