Lith显影的诱导期条件

Lith效应的产生要求严格的显影诱导期条件。Lith显影的诱导期条件要靠显影促进和显影抑制两种作用的结合来实现。半醌的显影促进作用缩短了显影颗粒邻近的载有较大潜影颗粒的显影诱导期,使颗粒间显影诱导期分布变窄。显影中心钝化现象的发生延长了载有较小潜影颗粒的显影诱导期,导致了表现显影诱导期对曝光量的依赖关系。Lith效应是两种作用在不同曝光区以不同程度发生的平衡结果。

THE INDUCTION PERIOD CONDITIONS FOR LITH DEVELOPMENT

Lith effect appears only when the induction period conditions are strictly controlled. The conditions required can be achieved with the aid of the corabination of the two actions: development acceleration and development inhibition. The development acceleration caused by semi-quinone shortens the induction period of the grains bearing larger latent-image leading to the narrow distribution of the induction period among grains. The passivation of the development centers lengthens the induction period of the grains bearing smaller latent-image resulting in the dependance between the apparent induction period and exposure. Lith effect appears as the consequence of the different affected degree of the two actions in different exposures.