(19)

(11)

EP 2 545 599 A1

(12)

(43) Date of publication: 16.01.2013 Bulletin 2013/03 (21) Application number: 11707864.2 (22) Date of filing: 11.03.2011

(51) International Patent Classification (IPC):  H01L 51/05(2006.01) H01L 51/50(2006.01) H01L 51/52(2006.01) (86) International application number: PCT/EP2011/053699 (87) International publication number: WO 2011/110664 (15.09.2011 Gazette 2011/37)

(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: 12.03.2010 IT RM20100107 (71) Applicant: Consiglio Nazionale Delle Ricerche 00185 Roma (IT)	(72) Inventors: MAIORANO, Vincenzo I-73013 Galatina (le) (IT) GIGLI, Giuseppe I-00167 Roma (IT) (74) Representative: Montevecchi, Emma  Cantaluppi & Partners S.r.l. Piazzetta Cappellato Pedrocchi, 18 35122 Padova 35122 Padova (IT)