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(11)

EP 2 474 040 A2

(12)

(88) Date of publication A3: 14.07.2011 (43) Date of publication: 11.07.2012 Bulletin 2012/28 (21) Application number: 10813967.6 (22) Date of filing: 03.09.2010

(51) International Patent Classification (IPC):  H01L 31/0224(2006.01) H01L 31/042(2006.01) (86) International application number: PCT/KR2010/005998 (87) International publication number: WO 2011/028058 (10.03.2011 Gazette 2011/10)

(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 SE SI SK SM TR (30) Priority: 04.09.2009 KR 20090083460 01.09.2010 KR 20100085604 (71) Applicant: Dongwoo Fine-Chem Co., Ltd. Jeollabuk-do 570-140 (KR)	(72) Inventors: LEE, Chang-Mo Jeollabuk-do 570-140 (KR) LEE, Seung-Yong Jeollabuk-do 570-140 (KR) LIM, Dae-Sung Jeollabuk-do 570-140 (KR) CHOI, Hyung-Sub Jeollabuk-do 570-140 (KR) HONG, Seung-Kwon Jeollabuk-do 570-140 (KR) (74) Representative: Nordic Patent Service A/S  Højbro Plads 10 1200 Copenhagen K 1200 Copenhagen K (DK)