(19)

(11)

EP 2 614 533 A1

(12)

(43) Date of publication: 17.07.2013 Bulletin 2013/29 (21) Application number: 10814719.0 (22) Date of filing: 07.09.2010

(51) International Patent Classification (IPC):  H01L 31/18(2006.01) H01L 31/068(2012.01) H01L 31/0224(2006.01) (86) International application number: PCT/EP2010/005471 (87) International publication number: WO 2012/031608 (15.03.2012 Gazette 2012/11)

(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 (71) Applicant: RENA GmbH 78148 Gütenbach (DE)	(72) Inventors: KRAY, Daniel 79098 Freiburg (DE) KÜHNLEIN, Holger 79279 Vörstetten (DE) (74) Representative: Stürken, Joachim  Joachim Stürken Patentanwaltsgesellschaft mbH Kirchenhölzle 18 79104 Freiburg 79104 Freiburg (DE)