Patent ID: 8530352

Claim:
A method of patterning a material, comprising: forming a first patterned mask over the material, the first patterned mask comprising a plurality of spaced-apart first features, the spaced-apart first features having lateral peripheries; the first features being parallel to one another and being spaced from one another by a first distance; forming spacers around the lateral peripheries of the spaced apart first features; the spacers and first features together forming spaced apart second features of a second patterned mask; the second features being spaced from one another by a second distance which is less than the first distance; forming a third patterned mask over the second patterned mask; the third patterned mask having a trench extending therethrough to exposed segments of the second features; the second and third patterned masks together defining a plurality of openings; and transferring the openings into the material.