(19)

(11)

EP 2 668 668 A2

(12)

(88) Date of publication A3: 20.09.2012 (43) Date of publication: 04.12.2013 Bulletin 2013/49 (21) Application number: 11856848.4 (22) Date of filing: 29.11.2011

(51) International Patent Classification (IPC):  H01L 31/042(2006.01) (86) International application number: PCT/KR2011/009147 (87) International publication number: WO 2012/102476 (02.08.2012 Gazette 2012/31)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR (30) Priority: 27.01.2011 KR 20110008481 (71) Applicant: LG Innotek Co., Ltd. Seoul 100-714 (KR)	(72) Inventor: GHO, Jung Hwan Seoul 100-714 (KR) (74) Representative: Novagraaf Technologies  122, rue Edouard Vaillant 92593 Levallois-Perret Cedex 92593 Levallois-Perret Cedex (FR)