(19)

(11)

EP 0 020 758 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 80900213.0 (22) Date of filing: 31.12.1979

(51) International Patent Classification (IPC):  H01L 35/ 00( . ) (86) International application number: PCT/US1979/001157 (87) International publication number: WO 1980/001438 (10.07.1980 Gazette 1980/15)

(84) Designated Contracting States: DE FR GB NL (30) Priority: 02.01.1979 US 19790000200 02.01.1979 US 19790000201 01.02.1979 US 19790008439 (71) Applicant: GOMEZ, Ernesto E. H. R. PR 00918 (US)	(72) Inventor: GOMEZ, Ernesto E. H. R. PR 00918 (US)