(19)

(11)

EP 2 783 394 A1

(12)

(43) Date of publication: 01.10.2014 Bulletin 2014/40 (21) Application number: 11790764.2 (22) Date of filing: 25.11.2011

(51) International Patent Classification (IPC):  H01L 25/11(2006.01) H01L 23/473(2006.01) H01L 25/16(2006.01) (86) International application number: PCT/EP2011/071025 (87) International publication number: WO 2013/075754 (30.05.2013 Gazette 2013/22)

(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 (71) Applicant: ALSTOM Technology Ltd 5400 Baden (CH)	(72) Inventor: ELLIOTT, Robert Stafford ST17 0HN (GB) (74) Representative: Ahner, Philippe et al BREVALEX 95, rue d'Amsterdam 75378 Paris Cedex 8 75378 Paris Cedex 8 (FR)