A method of forming a target pattern includes forming a plurality of lines over a substrate with a first mask and forming a spacer layer over the substrate, over the plurality of lines, and onto sidewalls of the plurality of lines. The method further includes removing at least a portion of the spacer layer to expose the plurality of lines and the substrate. The method further includes shrinking the spacer layer disposed onto the sidewalls of the plurality of lines and removing the plurality of lines thereby resulting in a patterned spacer layer over the substrate.