Method for cutting a photoresist-coated glass board, cutting machine for cutting a photoresist-coated glass board and method for manufacturing an optical recording medium

摘要

The present invention relates to a method for cutting a photoresist-coated glass board used for fabricating a stamper for an optical recording medium and the method includes steps of intermittently projecting a first laser beam onto the photoresist-coated glass board and intermittently projecting a second laser beam in synchronism with blocking the first laser beam onto the photoresist-coated glass board, thereby continuously and spirally forming an exposed region. According to the present invention, it is possible to obtain a high aperture ratio and suppress fluctuation of a local groove parameter at a land pre-pit portion.