(19)

(11)

EP 2 286 474 A2

(12)

(88) Date of publication A3: 04.03.2010 (43) Date of publication: 23.02.2011 Bulletin 2011/08 (21) Application number: 09761423.4 (22) Date of filing: 04.06.2009

(51) International Patent Classification (IPC):  H01L 51/00(2006.01) (86) International application number: PCT/EP2009/003988 (87) International publication number: WO 2009/149860 (17.12.2009 Gazette 2009/51)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 10.06.2008 GB 0810532 (71) Applicant: Merck Patent GmbH 64293 Darmstadt (DE)	(72) Inventor: KATHIRGAMANATHAN, Poopathy North Harrow HA2 7NN (GB)