Patent ID: 7964754

Claim:
A diimmonium salt for a near infrared ray absorption film represented by Formula 1, wherein, n is an integer of 1 or 2, R 1 to R 8 are independently a substituted or un-substituted linear or branched C 1 -C 10 alkyl group, the substituent for the alkyl group is selected from the group consisting of a cyano group, a nitro group, a carboxyl group, a sulfone group, a halogen atom, a hydroxyl group, a C 1 -C 8 alkoxy, alkoxyalkoxy, acyloxy, or alkylamino group, and C 6 -C 18 aryl or aryloxy group, and X − is a substituted fluoro alkyl phosphate anion represented by Formula 2, wherein, x is an integer of 0 or 1, y is an integer of 1, 2 or 3, z is an integer of 6-y, and R 9 to R 13 are independently a hydrogen atom (H) or a fluorine atom (F).