(19)

(11)

EP 0 792 522 A1

(12)

(43) Date of publication: 03.09.1997 Bulletin 1997/36 (21) Application number: 96933060.0 (22) Date of filing: 19.09.1996

(51) International Patent Classification (IPC):  H01L 27/ 146( . ) H01L 31/ 105( . ) (86) International application number: PCT/US1996/015036 (87) International publication number: WO 1997/011494 (27.03.1997 Gazette 1997/14)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 04.01.1996 US 19960005314 (71) Applicant: Astralux, Incorporated Boulder, CO 80301 (US)	(72) Inventor: QIU, Chang-Hua Lafayette, CO 80026 (US) (74) Representative: Schmitz, Jean-Marie, et al  Dennemeyer & Associates Sàrl P.O. Box 1502 1015 Luxembourg 1015 Luxembourg (LU)