Patent ID: 6864958

Claim:
A lithographic apparatus comprising: a support structure configured to support programmable patterning structure, the programmable patterning structure being configurable to pattern a beam of radiation according to a desired pattern; a substrate table configured to hold a substrate; and a projection system configured to project the patterned beam onto a target portion of the substrate, wherein the programmable patterning structure includes a plurality of reflective elements, each reflective element including upper and lower distributed Bragg reflectors having a separation relation selectable from among at least a first separation relation and a second separation relation, and wherein, when the first separation relation is selected, a reflectivity of the reflective element at a wavelength of the beam of radiation is relatively low, and when the second separation relation is selected, a reflectivity of the reflective element at a wavelength of the beam of radiation is relatively high, and wherein at least two among the plurality of reflective elements have a common distributed Bragg reflector.