Interconnection of IC Chips by Flex Circuit Superstructure
First Claim
1. An electrical assembly comprising:
- a first IC chip having top and bottom surfaces, a plurality of bottom side die terminals on the bottom surface, and a first through-silicon via terminating at a first top-side die terminal formed on the top surface of the first IC chip;
a first interconnection substrate with top and bottom surfaces and a first plurality of fine-pitch terminals disposed on a top surface, the first plurality of fine-pitch terminals of the first interconnection substrate being coupled in flip-chip connection with corresponding bottom-side die terminals of the first IC chip;
a second IC chip having top and bottom surfaces, a plurality of bottom side die terminals on the bottom surface, and a second through-silicon via terminating at a second top-side die terminal formed on the top surface of the second IC chip;
a second interconnection substrate with top and bottom surfaces and a second plurality of fine-pitch terminals disposed on a top surface, the second plurality of fine-pitch terminals being coupled in flip-chip connection with corresponding bottom-side die terminals of the second IC chip; and
,a first flexible circuit coupling the first top side die terminal and the second top side die terminal.
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Accused Products
Abstract
Integrated circuit chips have top and bottom surfaces. The bottom surfaces comprise a plurality of IC die terminals in flip-chip assembly with fine-pitch terminals formed on the top surface of corresponding interconnection substrate. Each IC chip includes one or more through-silicon vias and/or edge wrap connectors that extend to the top surface, terminating in IC die terminals. Flexible connectors are coupled between the IC die terminals on the top surfaces of corresponding first and second integrated circuit chips. The flexible connectors are preferably controlled impedance, and may include differential pairs, including twisted pairs, coaxial pairs, and broadside pairs. Conductive vias within the interconnection substrates couple the fine-pitch terminals to corresponding next-level terminals on the bottom surface of the respective interconnection substrates. The next level terminals of the interconnection substrates are interconnected with terminals of a printed circuit board.
26 Citations
22 Claims
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1. An electrical assembly comprising:
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a first IC chip having top and bottom surfaces, a plurality of bottom side die terminals on the bottom surface, and a first through-silicon via terminating at a first top-side die terminal formed on the top surface of the first IC chip; a first interconnection substrate with top and bottom surfaces and a first plurality of fine-pitch terminals disposed on a top surface, the first plurality of fine-pitch terminals of the first interconnection substrate being coupled in flip-chip connection with corresponding bottom-side die terminals of the first IC chip; a second IC chip having top and bottom surfaces, a plurality of bottom side die terminals on the bottom surface, and a second through-silicon via terminating at a second top-side die terminal formed on the top surface of the second IC chip; a second interconnection substrate with top and bottom surfaces and a second plurality of fine-pitch terminals disposed on a top surface, the second plurality of fine-pitch terminals being coupled in flip-chip connection with corresponding bottom-side die terminals of the second IC chip; and
,a first flexible circuit coupling the first top side die terminal and the second top side die terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An electrical assembly comprising:
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a first IC chip having top and bottom surfaces, a plurality of bottom side die terminals on the bottom surface, and a first through-silicon via terminating at a first top-side die terminal formed on the top surface of the first IC chip; a first interconnection substrate with top and bottom surfaces and a plurality of fine-pitch terminals disposed on a top surface, the fine-pitch terminals of the first interconnection substrate being coupled in flip-chip connection with the bottom-side die terminals of the first IC chip; a second IC chip having top and bottom surfaces, a plurality of bottom side die terminals on the bottom surface, and a first edge-wrap connector extending from the bottom surface and terminating at a second top-side die terminal formed on the top surface of the second IC chip; a second interconnection substrate with top and bottom surfaces and a plurality of fine-pitch terminals disposed on a top surface, the fine-pitch terminals being coupled in flip-chip connection with the bottom-side die terminals of the second IC chip; and
,a first flexible circuit coupling the first top side die terminal and the second top side die terminal. - View Dependent Claims (17, 18)
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19. An electrical assembly comprising:
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a first IC chip having top and bottom surfaces, a plurality of bottom side die terminals on the bottom surface, and a first edge-wrap connector extending from the bottom surface of the first IC chip and terminating at a first top-side die terminal formed on the top surface of the first IC chip; a first interconnection substrate with top and bottom surfaces and a plurality of fine-pitch terminals disposed on a top surface, the fine-pitch terminals of the first interconnection substrate being coupled in flip-chip connection with the bottom-side die terminals of the first IC chip; a second IC chip having top and bottom surfaces, a plurality of bottom side die terminals on the bottom surface, and a second edge-wrap connector extending from the bottom surface and terminating at a second top-side die terminal formed on the top surface of the second IC chip; a second interconnection substrate with top and bottom surfaces and a plurality of fine-pitch terminals disposed on a top surface, the fine-pitch terminals being coupled in flip-chip connection with the bottom-side die terminals of the second IC chip; and
,a first flexible circuit coupling the first top side die terminal and the second top side die terminal. - View Dependent Claims (20, 21)
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22. Apparatus comprising:
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a printed circuit board; at least two substrates flip chip mounted on said printed circuit board; an integrated circuit chip flip chip mounted on each of said substrates, the integrated circuit chips having top surfaces; and means for connecting signals between the top surfaces of respective of said integrated circuit chips.
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Specification