LASER ABLATION TOOLING VIA SPARSELY PATTERNED MASK

摘要

PROBLEM TO BE SOLVED: To solve problems in which the repeating structures made with these laser ablation systems tend to create moire when used to make a film for a display.SOLUTION: A sparsely patterned mask is provided for use in a laser ablation process to image a substrate. The mask has a plurality of apertures for transmission of light and non-transmissive areas around the apertures. The apertures individually form a portion of a complete pattern, and a plurality of apertures from one or more masks together form the complete pattern when the masks are imaged. Making a mask sparse provides for a path to remove debris from the substrate during the laser ablation process. Multiple interlaced sparse repeating patterns can create a more complex pattern with repeat distances larger than the individual patterns.