Patent ID: 8994916
Filing Date: 2015-03-31
Classification: G03F

Abstract:
1. A double-sided maskless exposure system comprising: a first optical engine for projecting patterns onto a first side of a subject plate; a second optical engine for projecting patterns onto a second side of the subject plate; a light source generating an input light for said first and second optical engines; a first beamsplitter for separating said input light from said light source for said first and second optical engines; a vision system for calibration and alignment of said first and second optical engines; a computer control system; wherein said vision system includes one or more cameras for capturing images of the patterns from said first and second optical engines; and said vision system is positioned co-axial with said first and second optical engines; and wherein said computer control system is configured to align both optical engines by comparing the patterns captured by said one or more cameras.