Patent ID: 7186498
Filing Date: 2007-03-06
Classification: G03F

Abstract:
1. An alkaline developer for irradiated radiation sensitive compositions, which developer is based on water and at least one inorganic salt having an alkaline reaction, wherein the developer has a pH of at least 11 and comprises at least three structurally different surfactants of formulae (A), (B) and (C), wherein the surfactants (A) and (B) are both amphoteric and wherein the surfactant of formula (A) has one anionic group, the surfactant of formula (B) has two anionic groups, the surfactant of formula (C) is non-ionic and has at least one non-ionic hydrophilic group comprising a polyethylenoxide group having from 3 to 100 ethylenoxide units, and the concentration of each of the surfactants of formulae (A), (B) and (C) in the developer is at least 0.05 weight-% based on the total weight of the developer.