(19)

(11)

EP 1 097 108 A1

(12)

(43) Date of publication: 09.05.2001 Bulletin 2001/19 (21) Application number: 99933046.7 (22) Date of filing: 14.07.1999

(51) International Patent Classification (IPC)7: C01G 1/00, C01G 23/053, C09C 1/36, C08K 3/00 (86) International application number: PCT/GB9902/271 (87) International publication number: WO 0003/950 (27.01.2000 Gazette 2000/04)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 14.07.1998 GB 9815270 (71) Applicant: Cambridge Display Technology Limited Cambridge, CB3 OHJ (GB)	(72) Inventors: HO, Peter Cambridge CB2 1TP (GB) TESSLER, Nir I-32000 Haifa (IS) FRIEND, Richard, Henry Cambridge CB3 9LG (GB) (74) Representative: Slingsby, Philip Roy et al Page White & Farrer54 Doughty Street London WC1N 2LS London WC1N 2LS (GB)