(19)

(11)

EP 0 609 432 A1

(12)

(43) Date of publication: 10.08.1994 Bulletin 1994/32 (21) Application number: 93920317.0 (22) Date of filing: 24.08.1993

(51) International Patent Classification (IPC):  H01L 23/ 467( . ) H01L 25/ 07( . ) H01L 25/ 16( . ) H01L 25/ 065( . ) H01L 25/ 11( . ) (86) International application number: PCT/US1993/007974 (87) International publication number: WO 1994/005040 (03.03.1994 Gazette 1994/06)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 24.08.1992 US 19920934938 (71) Applicants: IVERSEN, Arthur H. Saratoga, CA 95070 (US) GEORGE, Gabor Lafayette, CA 94549 (US)	(72) Inventors: IVERSEN, Arthur H. Saratoga, CA 95070 (US) GEORGE, Gabor Lafayette, CA 94549 (US) (74) Representative: UEXKÜLL & STOLBERG  Patentanwälte Beselerstrasse 4 D-22607 Hamburg D-22607 Hamburg (DE)