(19)

(11)

EP 0 248 841 A1

(12)

(43) Date of publication: 16.12.1987 Bulletin 1987/51 (21) Application number: 86907177.0 (22) Date of filing: 14.11.1986

(51) International Patent Classification (IPC):  H01L 21/ 265( . ) H01L 21/ 76( . ) H01L 29/ 812( . ) H01L 21/ 306( . ) H01L 29/ 47( . ) (86) International application number: PCT/US1986/002453 (87) International publication number: WO 1987/003742 (18.06.1987 Gazette 1987/13)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 13.12.1985 US 19850808920 (71) Applicant: ALLIED CORPORATION Morristown New Jersey 07960 (US)	(72) Inventor: AINA, Olaleye, Adetoro Columbia, MD 21045 (US)