Glass preform for glass for laser processing using ablation or evaporation by adsorbed laser-radiation energy, comprises silicate glass as main component, aluminum and alkali metal equivalence

摘要

The glass preform comprises silicate glass as main component, aluminum and alkali metal equivalence. An Independent claim is included for glass (20) for laser processing containing silver substituted to all or a portion of alkali metal in the preform by ion-exchange method.