Patent ID: 6994944

Claim:
A cathode separator for EL display devices formed from a radiation sensitive composition comprising: (A) an alkali soluble resin; (B) at least one compound selected from the group consisting of a compound represented by the following formula (I): wherein six Rs may be the same or different and each a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, a compound represented by the following formula (II): wherein Rs are defined as above, a compound represented by the following formula (III): wherein Rs are defined as above, and a compound represented by the following formula (IV): wherein Rs are defined as above; (C) a trihalomethyltriazine represented by the following formula (V): wherein X is a halogen atom and A is CX 3 or a group represented by the following formula: B, D and E are each independently a hydrogen atom, alkyl group, alkoxy group, aryloxy group, thioalkyl group, or having 1 to 10 carbon atoms, halogen atom, cyano group, nitro group, secondary amino group having an alkyl group with 1 to 10 carbon atoms, carboxyl group, hydroxyl group, ketoalkyl group or ketoaryl group having 1 to 10 carbon atoms, or alkoxycarbonyl group or alkylcarbonyloxy group having 1 to 20 carbon atoms, and m is an integer of 1 to 5, or an onium salt which serves as an optically acid generating agent represented by the following formula (VI): (A) n Z + Y − (VI) wherein A is as defined hereinabove, Z is sulfur or iodine, Y is BF 4 , PF 6 , SbF 6 , AsF 6 , p-toluene sulfonate, trifluoromethane sulfonate or trifluoroacetate, and n is 2 or 3, and 1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione added as an ultraviolet light absorber.