Integrated circuit package and assembly thereof for thermal and EMI management
First Claim
1. An integrated circuit package, comprising:
- a body comprising a dielectric portion cooperable with a substrate portion for enclosing the integrated circuit with electrically conductive members extending from the integrated circuit through the dielectric portion of the body to an exterior of the body;
the body also comprising a combined electromagnetic shielding and heat dissipation means comprising a plurality of layers forming a laminate structure overlying the dielectric portion and including;
a layer of a thermally conductive material;
a layer of a magnetic material having a high magnetic permeability to electromagnetic radiation generated by the integrated circuit;
at least one of said plurality of layers comprising an electrically conductive material and having conductive grounding means.
3 Assignments
0 Petitions
Accused Products
Abstract
A package is provided for an integrated circuit comprising a combined heat dissipating and electromagnetic shielding structure. Conveniently, the heat dissipation and shielding structure is a laminated composite structure including layers of several materials having complementary characteristics to provide high magnetic permeability, electrical conductivity, and thermal conductivity. For example, a sandwich structure of layers of copper/Kovar™/copper is effective in dissipating heat and reducing electromagnetic emission from ASICs for telecommunications applications, each dissipating in excess of 2 Watts. Preferably a substrate of the package includes a conductive die attach pad which may be grounded to bring a ground plane close to the integrated circuit. The composite electromagnetic shielding and heat dissipation structure is grounded to improve attenuation of radiated electromagnetic emission from the chip. The electromagnetic shielding and heat dissipation structure is applicable for packages for individual IC chips and for multi-chip modules.
211 Citations
19 Claims
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1. An integrated circuit package, comprising:
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a body comprising a dielectric portion cooperable with a substrate portion for enclosing the integrated circuit with electrically conductive members extending from the integrated circuit through the dielectric portion of the body to an exterior of the body; the body also comprising a combined electromagnetic shielding and heat dissipation means comprising a plurality of layers forming a laminate structure overlying the dielectric portion and including; a layer of a thermally conductive material; a layer of a magnetic material having a high magnetic permeability to electromagnetic radiation generated by the integrated circuit; at least one of said plurality of layers comprising an electrically conductive material and having conductive grounding means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An assembly of an integrated circuit chip and an integrated circuit package, comprising:
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an integrated circuit chip; an integrated circuit package comprising a body; and a plurality of electrically conductive terminal members; the body of the package having a substrate portion supporting the chip and a dielectric portion cooperable with the substrate enclosing the integrated circuit chip, with electrical connections extending between the chip and the electrically conductive terminal members, and with the conductive terminal members extending through the dielectric portion of the body to an exterior of the body; the package providing a combined electromagnetic shielding and heat dissipation means, the combined electromagnetic shielding and heat dissipation means comprising a plurality of layers forming a laminate structure extending over at least part of the dielectric portion and being thermally coupled with the substrate portion of the body; the plurality of layers including; a layer of a thermally conductive material; a layer of a magnetic material having a high magnetic permeability for electromagnetic radiation generated by operation of the integrated circuit chip; at least one of said plurality of layers being electrically conductive and having conductive means for making a ground connection; the integrated circuit chip being thermally coupled to the combined electromagnetic shielding and heat dissipation means through the substrate portion. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification