(19)
(11)
EP 0 253 886 A1
(12)
(43)
Date of publication:
27.01.1988
Bulletin 1988/04
(21)
Application number:
87902022.0
(22)
Date of filing:
24.12.1986
(51)
International Patent Classification (IPC):
H01L
25/
00
( . )
H01L
23/
52
( . )
H01L
25/
07
( . )
H01L
31/
167
( . )
G02B
6/
43
( . )
H01L
25/
065
( . )
H01L
25/
18
( . )
(86)
International application number:
PCT/US1986/002805
(87)
International publication number:
WO 1987/004566
(
30.07.1987
Gazette 1987/17)
(84)
Designated Contracting States:
DE FR GB IT NL
(30)
Priority:
21.01.1986
US 19860820624
(71)
Applicant:
AT&T Corp.
New York, NY 10013-2412 (US)
(72)
Inventors:
HORNAK, Lawrence, Anthony
Ocean, NJ 07712 (US)
TEWKSBURY, Stuart, Keene
Middletown, NJ 07748 (US)
(74)
Representative:
Johnston, Kenneth Graham, et al
AT&T (UK) Ltd. 5 Mornington Road
Woodford Green Essex, IG8 OTU
Woodford Green Essex, IG8 OTU (GB)
(54)
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