Patent ID: 8007986

Claim:
An immersion fluid having a transmission of 50% or greater of a total transmission at an operating wavelength ranging from 140 nm to 248 nm comprising: at least one carrier medium selected from the group consisting of bicyclohexyl, glycerol, and cis-2-methylcyclohexanol; and about 1 ppm to a maximum solubility limit of at least one additive selected from the group consisting of an alkyl alcohol; an alkyl ethoxylate, an alkyl propoxylate; an alkyl acid ester; an alkyl amine comprising an amine group; an alkyl amine ethoxylate; an acetylenic alcohol, an acetylenic diol comprising an ethylene oxide; an acetylenic diol comprising a propylene oxide; an alkyl polyglycoside; a block oligomer; a polymer of ethylene and propylene oxide; a glycidyl ether; a glucamine derivative of a glycidyl ether; a urea; a siloxane-containing compound; a fluorinated or partially fluorinated acetylenic alcohol; and a fluorinated or partially fluorinated acetylenic alcohol diol.