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US4956749A Expired / Lapsed US ⏱️ 0.0 years remaining

Interconnect structure for integrated circuits

Assignee: HP Inc
•
Filing: 1987-11-20
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Granted: 1990-09-11
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Expires: 2007-11-20
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Abstract

Abstract A semiconductor integrated device support structure having a transmission line interconnect structure in a metal block on which the devices are mounted. The metal block is formed photolithographically from layers which define X,Y sections of the block. A plurality of stacked layers contains the complete wireline interconnect network. Each wire is a true coaxial transmission line having an inner conductor, a surrounding dielectric material and an outer conductor. By appropriate choice of radii of the inner conductor and the surrounding dielectric material, favorable impedances may be selected.

Inventors

  • 👤 Cheng-Cheng Chang

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 23:20
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/02; H05K7/06; H10; H10W; H10W70/00; H10W70/60; H10W70/611; H10W70/62; H10W70/63; H10W70/635; H10W70/67; H10W70/68; H10W70/6875; H10W72/00; H10W72/071; H10W72/072; H10W72/07251; H10W72/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49144; Y10T29/49155; Y10T29/49162

Claims Analysis

Total Claims: 20
Claim 1
Independent Claim 84 words
An interconnection structure for semiconductor integrated circuits comprising, a substrate having a plurality of electrical terminal members therein, an electrically conductive metal block disposed over the substrate with a component mounting surface, the metal block containing an electrically conductive wire interconnection pattern, insulated from the metal block, extending from the plurality of electrical terminal members associated with the substrate to the component mounting surface of the block, and a plurality of semiconductor integrated circuits joined to the wire interconnection pattern at the mounting surface.
Claim 2
Dependent Claim 84 words
An interconnection structure for semiconductor integrated circuits comprising, a substrate having a plurality of electrical terminal members therein, an electrically conductive metal block disposed over the substrate with a component mounting surface, the metal block containing an electrically conductive wire interconnection pattern, insulated from the metal block, extending from the plurality of electrical terminal members associated with the substrate to the component mounting surface of the block, and a plurality of semiconductor integrated circuits joined to the wire interconnection pattern at the mounting surface.
Claim 3
Dependent Claim 34 words
The interconnection structure of claim 1 wherein wires comprising said wire interconnection pattern have a dielectric material coating coaxially surrounding said wires in the pattern, with said dielectric material coating contacting the metal block.
Claim 4
Dependent Claim 43 words
The interconnection structure of claim 2, wherein said wires have an average radius, a, and said dielectric material coating has an average radius, b, wherein the ratio b/a is characteristic of a transmission line having a desired impedance for the selected dielectric material.
Claim 5
Dependent Claim 26 words
The interconnection structure of claim 1 wherein said electrical terminal members are pins extending from said substrate and in electrical communication with said wire interconnection pattern.
Claim 6
Independent Claim 112 words
A method of interconnecting finished integrated circuits with a coaxial transmission line network comprising, (a) building a network of bare electrically conductive wires over a nonconductive substrate in a three dimensional structure extending from chip contact locations to wire terminal members projecting through said substrate at signal interface locations spaced apart from the chip contact locations, (b) coating the built network of bare wires over said substrate with a selected dielectric material to form a plurality of coaxial transmission lines each having an impedance dependent on the ratio of a diameter of the dielectric material to a diameter of the conductive wires, and (c) encapsulating the dielectrically coated bare wires with metal.
Claim 7
Independent Claim 112 words
A method of interconnecting finished integrated circuits with a coaxial transmission line network comprising, (a) building a network of bare electrically conductive wires over a nonconductive substrate in a three dimensional structure extending from chip contact locations to wire terminal members projecting through said substrate at signal interface locations spaced apart from the chip contact locations, (b) coating the built network of bare wires over said substrate with a selected dielectric material to form a plurality of coaxial transmission lines each having an impedance dependent on the ratio of a diameter of the dielectric material to a diameter of the conductive wires, and (c) encapsulating the dielectrically coated bare wires with metal.
Claim 8
Dependent Claim 48 words
The method of claim 5 further defined by providing said wires with an average diameter a, and said dielectric material coating with an average outer diameter b, where the ratio b/a is characteristic of a respective coaxial transmission line having a desired impedance for said selected dielectric material.
Claim 9
Dependent Claim 16 words
The method of claim 5 further defined by terminating the chip contact locations in solder bumps.
Claim 10
Dependent Claim 22 words
The method of claim 5 wherein said metal for encapsulating the dielectrically coated bare wires is selected from copper and nickel plating.
Claim 11
Dependent Claim 14 words
The method of claim 5 further defined by building said network of wires photolithographically.
Claim 12
Dependent Claim 19 words
The method of claim 5 further defined by forming thermally conductive fins in said metal encapsulating said coated wires.
Claim 13
Dependent Claim 17 words
The method of claim 5 further defined by building said network of wires one layer upon another.
Claim 14
Independent Claim 219 words
A method for interconnecting finished semiconductor integrated circuits comprising, providing a substrate having a planar upper surface and a plurality of electrical terminal members therein, patterning a first planar layer over the planar substrate surface, the pattern comprising resist regions and electrically conductive metal regions, the metal regions communicating with the electrical terminal members and being x,y sections of a three dimensional wire interconnection pattern, patterning further planar layers, each atop a lower patterned planar layer, the pattern in each layer comprising resist and electrically conductive metal regions and being x,y sections of a three dimensional wire interconnection pattern, the further planar layers defining a z direction for the interconnection pattern wherein x,y and z are orthogonal coordinate directions, the uppermost layer having metal regions in locations corresponding to contact locations of finished semiconductor integrated circuits, removing the resist from all layers, leaving an exposed electrically conductive metal interconnection pattern, coating the metal interconnection pattern, with a coaxial sheath of dielectric material, the coating having a thickness sufficient to prevent electrical shorting between the interconnection pattern and subsequent metal plating, applying metal plating to the dielectric material in a volume forming a support block encapsulating the dielectric coated metal interconnection pattern, and joining finished semiconductor integrated circuits to exposed metal regions in the upper surface of the uppermost layer.
Claim 15
Independent Claim 219 words
A method for interconnecting finished semiconductor integrated circuits comprising, providing a substrate having a planar upper surface and a plurality of electrical terminal members therein, patterning a first planar layer over the planar substrate surface, the pattern comprising resist regions and electrically conductive metal regions, the metal regions communicating with the electrical terminal members and being x,y sections of a three dimensional wire interconnection pattern, patterning further planar layers, each atop a lower patterned planar layer, the pattern in each layer comprising resist and electrically conductive metal regions and being x,y sections of a three dimensional wire interconnection pattern, the further planar layers defining a z direction for the interconnection pattern wherein x,y and z are orthogonal coordinate directions, the uppermost layer having metal regions in locations corresponding to contact locations of finished semiconductor integrated circuits, removing the resist from all layers, leaving an exposed electrically conductive metal interconnection pattern, coating the metal interconnection pattern, with a coaxial sheath of dielectric material, the coating having a thickness sufficient to prevent electrical shorting between the interconnection pattern and subsequent metal plating, applying metal plating to the dielectric material in a volume forming a support block encapsulating the dielectric coated metal interconnection pattern, and joining finished semiconductor integrated circuits to exposed metal regions in the upper surface of the uppermost layer.
Claim 16
Dependent Claim 37 words
The method of claim 12 wherein said metal regions in each of said planar layers have an average radius, a, and said coaxial sheath of dielectric material coating the metal interconnection pattern has an average radius, b.
Claim 17
Dependent Claim 54 words
The method of claim 12 wherein said metal regions in each of said planar layers have an average radius, a, and said dielectric material coating the metal interconnection pattern has an average radius, b, wherein the ratio b/a is characteristic of a coaxial transmission line having a desired impedance for the selected dielectric material.
Claim 18
Dependent Claim 14 words
The method of claim 12 wherein said plating is copper or electroless nickel plating.
Claim 19
Independent Claim 103 words
A method of interconnecting finished integrated circuits comprising, building a network of bare electrically conductive wires in a three dimensional structure extending from chip contact locations to signal interface locations spaced apart from the chip contact locations, coating the bare wires with a dielectric material to form a plurality of coaxial transmission lines each having an impedance dependent on the ratio of a diameter of the dielectric material to a diameter of the respective conductive wire, and encapsulating the dielectrically coated bare wires with metal, thereby completing a transmission line network and forming said metal to establish one or more thermally conductive fins.
Claim 20
Independent Claim 103 words
A method of interconnecting finished integrated circuits comprising, building a network of bare electrically conductive wires in a three dimensional structure extending from chip contact locations to signal interface locations spaced apart from the chip contact locations, coating the bare wires with a dielectric material to form a plurality of coaxial transmission lines each having an impedance dependent on the ratio of a diameter of the dielectric material to a diameter of the respective conductive wire, and encapsulating the dielectrically coated bare wires with metal, thereby completing a transmission line network and forming said metal to establish one or more thermally conductive fins.

References Cited (Backward Citations)

US3365620A Cited
US4245273A Cited
US4665468A Cited
US4679321A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-09-10 1994-03-12 1994-09-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-09-10 1998-03-12 1998-09-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-09-10 2002-03-12 2002-09-11 $7700.00 Window Closed / Lapsed

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