(19)

(11)

EP 1 029 352 A1

(12)

(43) Date of publication: 23.08.2000 Bulletin 2000/34 (21) Application number: 98957652.5 (22) Date of filing: 09.11.1998

(51) International Patent Classification (IPC)7: H01L 23/427, H01L 23/373 (86) International application number: PCT/US9823/711 (87) International publication number: WO 9926/286 (27.05.1999 Gazette 1999/21)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 13.11.1997 US 65418 P (71) Applicant: BP AMOCO CORPORATION ChicagoIllinois 60680-0703 (US)	(72) Inventors: LEVESQUE, Kevin, J. Alpharetta, GA 30004 (US) MILLER, James, D. Marietta, GA 30062 (US) (74) Representative: Ritter, Stephen David et al Mathys & Squire100 Grays Inn Road London WC1X 8AL London WC1X 8AL (GB)