Patent ID: 7859646
Filing Date: 2010-12-28
Classification: G02B,G03F

Abstract:
1. A method for writing an arbitrary, two-dimensional pattern using interferometric lithography comprising the steps of: creating a pixel array defined by a number of pixels having specific coordinates; mapping pixel information based on the desired pattern, the pixel information including a list of which pixels are activated to define the desired two-dimensional pattern; controlling a relative strength of each pixel for indicating a feature height of a portion of the desired two-dimensional pattern; controlling a degree that one pixel is shifted in an x-direction and a y-direction relative to original coordinates of the pixel in order to define the desired two-dimensional pattern pixel by pixel; and writing the two-dimensional pattern pixel by pixel on a recording material; wherein each pixel has an associated A coefficient value, an α coefficient value and a β coefficient value, the A coefficient value representing the relative intensity of the pixel, the α coefficient value representing the degree that the pixel is shifted horizontally (x-direction) relative to base coordinates of the pixel, the β coefficient value representing the degree that the pixel is shifted vertically (y-direction) relative to the base coordinates of the pixel, wherein the shifting of one or more pixels forms non-linear features of the pattern.