Patent ID: 7283205

Claim:
A light mask for use in an optical lithography patterning apparatus, comprising: a central axis; first and second openings therein being of equidistance and mirror images with each other centered about the central axis, said first and second openings each being defined on first and second sides by concentric arcs each having an arc length of 60°±10° and being further defined on third and fourth sides by first and second nonparallel lines having a radial length extending from about 0.67 sigma (σ) to at least about 0.92 σ; and third, fourth, fifth, and sixth openings therein, wherein the third and fourth openings are of equidistance and mirror images with each other about the central axis and the fifth and sixth opening are of equidistance and mirror images with each other about the central axis, said third, fourth, fifth, and sixth openings each being defined on first and second sides by concentric arcs each having an arc length of 22°±10° and being further defined on third and fourth sides by nonparallel lines having a radial length extending from about 0.72 σ to at least about 0.92 σ.