METHOD FOR RECORDING INFORMATION IN AN OPTICALLY READABLE DATA MEMORY

摘要

In a method for recording information in an optical data memory by surface texturing, a substrate surface is first pre-treated or sensitized by selective irradiation at relatively low fluence. For selectivity of irradiation, a mask, a holographic imaging process, or direct writing may be used. In a second step, the sensitized regions are ablated from the surface by means of spatially non-selective irradiation at a different wavelength and at relatively high fluence.