Patent ID: 9001305
Filing Date: 2015-04-07
Classification: G03F

Abstract:
1. A maskless exposure system comprising: a plurality of maskless optical engines that form and project a pattern onto a substrate, wherein said plurality of optical engines are arranged in a matrix of M rows and N columns; a first stage system coupled to said maskless optical engines, said first stage system drives said maskless optical engines in a first direction; and a second stage system that holds and moves said substrate in a second direction perpendicular to said first direction; a control system communicably coupled to said second stage system, said control system processes data and synchronizes the drive of said first stage system with the movement of said second stage system; a vision system communicably coupled to said control system, said vision system detects a position of said second stage system to synchronize movements with said plurality of optical engines; a reference mark late that is adjacent to said second stage and separate from the substrate, and marks a set of moving positions of said plurality of maskless optical engines wherein said marks including a start point, an end point and a line of movement for each maskless optical engine; and wherein control system is configured to coordinate the change of light intensity and scan speed of each maskless optical engine along the direction of its movement to smooth the transition from one maskless engine's exposure area to next adjacent maskless engine's exposure area so that the pattern can be seamlessly exposed to all parts of the substrate.