Laser thermal recording on non-homogeneous medium

Abstract

The non-homogeneous multilayer medium was proposed for laser thermal recording. The mathematical model of laser thermal recording based on the phase transition of non-homogeneous medium (such as melting, ablation, evaporation) to simulate and optimize was developed. It was shown that in multilayer recording medium can be performed narrower structures than in monolayer films on similar conditions. It was shown that for getting small structures the thermoconduction of recording medium should be much smaller than the thermoconduction of substrate on which a medium is deposited. It was demonstrated that in the case of strong light absorption in recording layer its thermal conductivity must be sufficiently large to ensure the transfer of heat on a distance that equals to the thickness of the layer during a time interval equals to the difference in time for warming up to the phase transition temperature of the central part of the light spots and area that separated from a center of light spot on a distance equals to the thickness of layer.