(19)

(11)

EP 1 266 053 A1

(12)

(43) Date of publication: 18.12.2002 Bulletin 2002/51 (21) Application number: 01908872.3 (22) Date of filing: 06.02.2001

(51) International Patent Classification (IPC)7: C30B 11/02, C30B 11/14, C30B 1/02, C30B 29/12 (86) International application number: PCT/US0103/759 (87) International publication number: WO 0107/3168 (04.10.2001 Gazette 2001/40)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 24.03.2000 FR 0003771 (71) Applicant: CORNING INCORPORATED Corning, N.Y. 14831 (US)	(72) Inventor: HERVE, Patrick, J., P. F-77210 Avon (FR) (74) Representative: Weise, Reinhard, Dipl.-Ing.  Reinhard-Skuhra-Weise & PartnerPatentanwältePostfach 44 01 51 80750 München 80750 München (DE)