3-D integrated circuit lateral heat dissipation
First Claim
Patent Images
1. A three dimensional integrated circuit (IC) device, comprising:
- a first die stacked on a second die, each die comprising an active face and a substrate, the dies'"'"' active faces coupled together by a plurality of tier to tier connections, and the tier to tier connections creating a gap between the active laces of the first and second die;
a through-substrate via filled with a first thermally conductive material disposed in the first die; and
a thermally conductive layer positioned within the gap.
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Abstract
By filling an air gap between tiers of a stacked IC device with a thermally conductive material, heat generated at one or more locations within one of the tiers can be laterally displaced. The lateral displacement of the heat can be along the full length of the tier and the thermal material can be electrically insulating. Through silicon-vias (TSVs) can be constructed at certain locations to assist in heat dissipation away from thermally troubled locations.
31 Citations
25 Claims
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1. A three dimensional integrated circuit (IC) device, comprising:
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a first die stacked on a second die, each die comprising an active face and a substrate, the dies'"'"' active faces coupled together by a plurality of tier to tier connections, and the tier to tier connections creating a gap between the active laces of the first and second die; a through-substrate via filled with a first thermally conductive material disposed in the first die; and a thermally conductive layer positioned within the gap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A three dimensional integrated circuit (IC) device, comprising:
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a first die and a second die, each die comprising an active face and a substrate; means for coupling the dies'"'"' active faces, the means for coupling creating a gap between the first die and second die; means, disposed in a via extending through the first die, for conducting heat; and means disposed within the gap, for conducting heat. - View Dependent Claims (12, 13)
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14. A three dimensional integrated circuit (IC) device, comprising:
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a first die stacked on a second die, the first die being circumferentially larger than the second die; the first and second dies coupled together by a plurality of tier to tier connections, and the tier to tier connections creating a gap between the first and second die; a through-substrate via filled with a thermally conductive material disposed in the first die; and the second die comprising a thermally conductive layer. - View Dependent Claims (15)
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16. An integrated circuit (IC) device, comprising:
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a first die comprising an active layer on a substrate, a through-substrate via filled with a thermally conductive material disposed in the first die; and a thermally conductive and electrically insulating layer directly coupled to only the active layer of the first die distal from the substrate. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification