Patent ID: 8363209

Claim:
A maskless exposure method, comprising: preparing a maskless exposure part including a light source for projecting a light, a Spatial Light Modulator (SLM) for reflecting the light projected from the light source as a light having a first pattern, a Multi-Array Lens (MAL) arrayed with a plurality of lenses so as to divide the light having the first pattern reflected from the SLM into a plurality of lights and collect the divided lights, and a projection lens for controlling resolutions of the lights collected by the MAL and transmitting the resultant lights; irradiating the light of the first pattern from the maskless exposure part to a Main Reference Unit (MRU) formed of a light transmissive material and formed with a second pattern that does not transmit the light having the first pattern; photographing the light transmitted through the MRU at a MRU camera; calculating a misalignment error with the first and second patterns represented in an image photographed by the MRU camera; and moving and aligning the MAL or the SLM for correcting the misalignment error.