(19)

(11)

EP 2 807 680 A2

(12)

(88) Date of publication A3: 19.09.2013 (43) Date of publication: 03.12.2014 Bulletin 2014/49 (21) Application number: 13702563.1 (22) Date of filing: 23.01.2013

(51) International Patent Classification (IPC):  H01L 31/18(2006.01) G01R 31/26(2014.01) (86) International application number: PCT/US2013/022699 (87) International publication number: WO 2013/112551 (01.08.2013 Gazette 2013/31)

(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: 23.01.2012 US 201261589449 P (71) Applicant: First Solar, Inc Perrysburg, OH 43551 (US)	(72) Inventors: GLOECKLER, Markus Perrysburg, OH 43551 (US) KHAN, Imran Perrysburg, OH 43551 (US) TRIVEDI, Jigish Perrysburg, OH 43551 (US) TRUMAN, Thomas Toledo, OH 43623 (US) (74) Representative: Dearden, Anthony James et al Kilburn & Strode LLP 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)