(19)

(11)

EP 1 849 190 A1

(12)

(43) Date of publication: 31.10.2007 Bulletin 2007/44 (21) Application number: 06704207.7 (22) Date of filing: 02.02.2006

(51) International Patent Classification (IPC):  H01L 31/048(2006.01) (86) International application number: PCT/GB2006/000346 (87) International publication number: WO 2006/082399 (10.08.2006 Gazette 2006/32)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 02.02.2005 GB 0502120 (71) Applicant: Powertile Limited Durley, Southampton SO32 2EJ (GB)	(72) Inventor: MUCCI, Peter Durley, Southampton SO32 2EJ (GB) (74) Representative: Robinson, Simon John  Barker Brettell, Medina Chambers, Town Quay Southampton SO14 2AQ Southampton SO14 2AQ (GB)