A laser method for marking bar codes on glass substrates

摘要

A method that uses a Nd:YAG laser was developed to mark bar codes on glass substrates. In this method, bar codes are created by a combination of laser deposition and laser trimming; a film for the black bars of the bar code is deposited on the glass substrate, and part of the deposited film is trimmed to expose the white bars of the code. The resulting bar code has high contrast and high resolution.