Patent ID: 7385211

Claim:
A method of generating extreme ultraviolet radiation, comprising: providing a radiant medium having a basic material distribution, the basic material distribution including at least one halogenide of a metal which is selected from the group consisting of lithium (Li), indium (In), tin (Sn), antimony (Sb), tellurium (Te) and aluminum (Al), the halogenide not being a halogenide of chlorine (Cl) or fluorine (F) when the metal selected is lithium (Li), or including a halogen and said at least one halogenide of a metal, except for those combinations of halogenides and halogens wherein said halogen is chlorine (Cl) or fluorine (F) and the selected metal of the at least one halogenide of a metal, is lithium (Li), and, generating a plasma of such radiant medium.