(19)

(11)

EP 2 462 626 A2

(12)

(88) Date of publication A3: 16.06.2011 (43) Date of publication: 13.06.2012 Bulletin 2012/24 (21) Application number: 10807129.1 (22) Date of filing: 05.08.2010

(51) International Patent Classification (IPC):  H01L 31/042(2006.01) H01L 31/0216(2006.01) (86) International application number: PCT/US2010/044483 (87) International publication number: WO 2011/017479 (10.02.2011 Gazette 2011/06)

(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: 05.08.2009 US 231493 P (71) Applicant: E. I. du Pont de Nemours and Company Wilmington, DE 19898 (US)	(72) Inventors: CARCIA, Peter, Francis Wilmington DE 19810-3413 (US) MCLEAN, Robert, Scott Hockessin DE 19707 (US) (74) Representative: Hoffmann, Benjamin  Dehns St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)