(19)

(11)

EP 0 956 623 A1

(12)

(43) Date of publication: 17.11.1999 Bulletin 1999/46 (21) Application number: 98903741.0 (22) Date of filing: 27.01.1998

(51) International Patent Classification (IPC):  H01L 33/ 32( . ) H01S 5/ 02( . ) H01S 5/ 00( . ) H01S 5/ 323( . ) (86) International application number: PCT/US1998/001494 (87) International publication number: WO 1998/034304 (06.08.1998 Gazette 1998/31)

(84) Designated Contracting States: DE FR GB (30) Priority: 30.01.1997 JP 19970016313 (71) Applicant: Hewlett-Packard Company Palo Alto California 94303-0890 (US)	(72) Inventor: KANEKO, Yawara Chigasaki, Kanagawa (JP) (74) Representative: Schoppe, Fritz, Dipl.-Ing.  Schoppe, Zimmermann & Stöckeler Patentanwälte Postfach 71 08 67 81458 München 81458 München (DE)