Laser Marking of Ablative Organic Dye-in-Polymer Films

G. E. Johnson; K. Y. Law

doi:10.1117/12.936089

10 November 1983 Laser Marking of Ablative Organic Dye-in-Polymer Films

G. E. Johnson, K. Y. Law

Proceedings Volume 0420, Optical Storage Media; (1983) https://doi.org/10.1117/12.936089
Event: 1983 Optical Mass Data Storage Conferences, 1983, Arlington, United States

Abstract

Thin films consisting of an organic dye dissolved in a polymer binder have been shown to constitute a viable medium for high density optical recording and storage of information. An investigation has been made which addresses the influence of the polymer binder on the marking process in this type of medium. Time resolved measurements on a series of films, in which the molecular weight of the polystyrene binder is systematically varied between 2.1 K and 2000 K, have revealed a molecular weight dependent relaxation phenomenon which occurs subsequent to the initial hole opening. The relaxation phenomenon appears to be a flow of displaced molten polymeric material back into the initially created hole. This relaxation process becomes important at a molecular weight of 37 K a value close to the critical molecular weight where chain entanglements occur and where the melt viscosity becomes strongly molecular weight dependent.

Citation Download Citation

G. E. Johnson and K. Y. Law "Laser Marking of Ablative Organic Dye-in-Polymer Films", Proc. SPIE 0420, Optical Storage Media, (10 November 1983); https://doi.org/10.1117/12.936089

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