Phthalocyanine materials have successfully been applied in infrared ray optical disc systems. Seeking for the phthalocyanine-analogous materials with great conjugate macrocyclic π bond system is the key for new materials research of super high density blue laser optical storage. Dibenzotetraaza  annulene have the similar macrocyclic structure. It was used as a building block for the preparation of multi-component materials matched the requirement of recordable blue laser optical disc. Ester substituents have been generated with oxalyl dichloride (or phosgene) and appropriate HO-function-containing substrates. A range of new complexes equipped with ester groups derived from various alcohols and phenols have been prepared. The new products have been characterized by UV-Vis spectrometer, TGA, refractive index of the organic films. These kinds of materials have suitable light and thermal sensitivity, and it is a valuable material for blue laser optical storage.
The dye coating is the most important process in CD-R replication technique, because the coating result has a significant effect on the final disc quality. Optical density (OD) curve represents the result of dye coating. In this paper an optical density curve model for dye coating is discussed. It can be used as an analysis tool of many important parameters in the coating process, thereby control the disc quality. The optical density curve of the disc after coating is measured with the Dr Schenk and then divided into several sections to line-fitting. The new curve has 4 characteristic points and 3 characteristic line sections, which can be used to make process analysis.
A theoretical model for CD-R dye coating on a substrate with spiral pre-groove is presented. A typical CD-R dye coating process consists of three stages: dispensing stage, spreading stage and vaporizing stage. Some assumptions and simplification for every stage are made and the second stage is mainly analyzed. The motion equation, boundary equations and continuity equation of flow for dye film are derived, taking into account topography on substrate and interface slip between liquid and substrate. Finally the governing equation is given.