Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1992-12-22
1994-04-26
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428209, 361718, 257714, B32B 900
Patent
active
053065468
ABSTRACT:
A multi-level substrate (24) for mounting and interconnecting a number of integrated circuit chips (10) is formed of a stack of laminated sheets each comprising a conductive circuit layer (30,34,38,42,46) is laminated to a dielectric film (32,36,40,44,48). The sheets are formed by fully additive or semi-additive processes on a reusable mandrel and are interconnected to one another by raised features (78) on the circuit layer of one sheet that project through a hole (86) in the dielectric film of an adjacent sheet to contact a receiving area (88) of the circuit layer of the adjacent sheet. Integrated circuit chips (10) and other electrical components are mounted to the uppermost sheet and electrically connected thereto by means of wiring bonding (16) or a f lip-chip arrangement (150) in which chip pads (148) rest upon and contact raised features (146) of the circuit layer (140) of the uppermost sheet.
REFERENCES:
patent: 4377316 (1983-03-01), Ecker et al.
patent: 4652970 (1987-03-01), Watari et al.
patent: 4744007 (1988-05-01), Watari et al.
patent: 5189505 (1993-02-01), Bartelink
Bowers Harold C.
Feigenbaum Haim
Schreiber Christopher M.
Denson-Low W. K.
Gudmestad Terje
Hughes Aircraft Company
Lee Kam F.
Leiterge Elizabeth E.
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