Patent ID: 7697115

Claim:
A lithography apparatus, comprising: a patterning device that is configured to pattern a beam of radiation and generate patterned beam pulses, the patterned beam pulses having a first frequency; a substrate table configured to support and scan a substrate at a scanning velocity; and a projection system including a scanning device, the scanning device including a reflective device and a plurality of flexures, the plurality of flexures being coupled to and extending from a bottom surface of the reflective device and being configured to allow the reflective device to resonate about an axis of rotation, wherein the scanning device is configured to scan the patterned beam pulses onto a target area of the substrate, and wherein the resonant frequency of the scanning device is substantially a same value as the first frequency, an angular deflection of the scanning device is synchronized with a position of the substrate table, and an amplitude of resonant motion is controlled to substantially match an angular velocity of the scanning device to the scanning velocity of the substrate table during each of the pulses.