Abstract

The object of this work was to determine the relationship between writing sensitivity of organic dye-binder media and media melt viscosity. Writing sensitivity was defined as the recording response against writing laser power. That response was measured by the electronic readout of the recorded pits. As a theoretical framework, the mechanism of hole formation espoused by Wrobel et al. (1) was assumed. That is, pit formation was considered to be essentially a flow process in which the primary driving force is back pressure due to limited material ablation and decomposition. Thus it was believed that diffusion processes were unimportant; consequently, the glass-transition temperature was not expected to be a controlling parameter. As theorized by Kivits et al. (2), it was assumed that friction forces due to viscosity had to be overcome for pit formation. This work was not concerned with the influence of optical efficiency. The work of Howe and Wrobel (3) for optimizing the dye-binder layer for optimum optical performance has been followed.

© 1987 Optical Society of America