(19)

(11)

EP 0 662 019 A1

(12)

(43) Date of publication: 12.07.1995 Bulletin 1995/28 (21) Application number: 93922240.0 (22) Date of filing: 17.09.1993

(51) International Patent Classification (IPC):  B22D 19/ 14( . ) B01D 53/ 04( . ) B32B 15/ 04( . ) C04B 37/ 00( . ) C04B 38/ 00( . ) C04B 41/ 52( . ) C04B 41/ 89( . ) C22C 29/ 12( . ) F02F 3/ 00( . ) H01L 23/ 498( . ) H05K 3/ 40( . ) H05K 1/ 03( . ) B01D 29/ 11( . ) B01D 63/ 06( . ) B32B 18/ 00( . ) C04B 37/ 02( . ) C04B 41/ 51( . ) C04B 41/ 88( . ) C22C 1/ 10( . ) C23C 2/ 04( . ) H01L 21/ 48( . ) H01L 23/ 538( . ) F02B 3/ 06( . ) (86) International application number: PCT/US1993/008835 (87) International publication number: WO 1994/006585 (31.03.1994 Gazette 1994/08)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 17.09.1992 US 19920946972 18.09.1992 US 19920947427 (71) Applicants: RITLAND, Marcus, A. Golden, CO 80403 (US) READEY, Dennis W. Lakewood, CO 80215 (US)	(72) Inventors: RITLAND, Marcus, A. Golden, CO 80403 (US) READEY, Dennis W. Lakewood, CO 80215 (US) (74) Representative: Wharton, Peter Robert  Urquhart-Dykes & Lord Inventions House Valley Court, Canal Road Bradford BD1 4SP Bradford BD1 4SP (GB)