(19)
(11) EP 0 454 734 A1

(12)

(43) Date of publication:
06.11.1991 Bulletin 1991/45

(21) Application number: 90902042.0

(22) Date of filing: 02.01.1990
(51) International Patent Classification (IPC): 
C03C 3/ 083( . )
C03C 10/ 00( . )
H01L 21/ 48( . )
H05K 1/ 03( . )
C03C 8/ 16( . )
H01B 3/ 08( . )
H01L 23/ 15( . )
H05K 1/ 09( . )
(86) International application number:
PCT/US1990/000005
(87) International publication number:
WO 1990/008110 (26.07.1990 Gazette 1990/17)
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB IT LI LU NL SE

(30) Priority: 19.01.1989 US 19890299104
21.09.1989 GB 19890021386
15.12.1989 US 19890450990

(71) Applicant: DAVID SARNOFF RESEARCH CENTER
Princeton, NJ 08543-5300 (US)

(72) Inventors:
  • PRABHU, Ashok, Narayan
    E Windsor, NJ 08520 (US)
  • HANG, Kenneth, Warren
    Westchester, PA 19382 (US)
  • CONLON, Edward, James
    Princeton, NJ 08520 (US)

(74) Representative: Targett, Kenneth Stanley 
D. Young & Co., 21 New Fetter Lane
London EC4A 1DA
London EC4A 1DA (GB)

   


(54) DEVITRIFYING GLASS FORMULATIONS FOR LOW EXPANSION PRINTED-CIRCUIT SUBSTRATES AND INKS