US6049469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination electromagnetic shield and heat spreader
Assignee: Dell USA LP
•
Filing: 1997-08-20
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Granted: 2000-04-11
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Expires: 2017-08-20
Abstract
Abstract An apparatus for providing heat dissipation and electromagnetic shielding for an integrated circuit, such as a CPU, in a computer system includes a first surface thermally coupling the apparatus to an integrated circuit (IC). The apparatus, including the first surface, is of a material, such as some alloys of beryllium copper, with a yield strength of at least 80,000 pounds per square inch and with a thermal conductivity of at least 220 watts/meter*degree (Kelvin). The material is electrically conductive.
Inventors
- 👤 Charles D. Hood, III
- 👤 Damon W. Broder
- 👤 Eric B. Holloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:46
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/2039; H05K7/20436; H05K7/20445; G; G06; G06F; G06F1/00; G06F1/16; G06F1/18; G06F1/181; G06F1/182; G06F1/20; H05K7/2049; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
70 words
An apparatus for providing heat dissipation and electromagnetic shielding for an integrated circuit, the apparatus comprising: a first surface, the first surface thermally coupling the apparatus to an integrated circuit (IC); wherein the apparatus, including the first surface, is of a material with a yield strength of at least 80,000 pounds per square inch and with a thermal conductivity of at least 220 watts/meter*degree (Kelvin), the material being electrically conductive.
Claim 2
Independent Claim
70 words
An apparatus for providing heat dissipation and electromagnetic shielding for an integrated circuit, the apparatus comprising: a first surface, the first surface thermally coupling the apparatus to an integrated circuit (IC); wherein the apparatus, including the first surface, is of a material with a yield strength of at least 80,000 pounds per square inch and with a thermal conductivity of at least 220 watts/meter*degree (Kelvin), the material being electrically conductive.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein the first material is an alloy of beryllium copper.
Claim 4
Dependent Claim
20 words
The apparatus of claim 2 wherein the first material has a Unified Numbering System (UNS) number of C17510 or C17410.
Claim 5
Dependent Claim
25 words
The apparatus of claim 1 wherein the first material is a magnesium modified copper corson alloy having a Unified Numbering System (UNS) number of C7025.
Claim 6
Dependent Claim
13 words
The apparatus of claim 1 wherein: the apparatus has a generally planar portion.
Claim 7
Dependent Claim
22 words
The apparatus of claim 5 wherein: the first surface is located on an emboss on the generally planar portion of the apparatus.
Claim 8
Dependent Claim
33 words
The apparatus of claim 1 further comprising: an extension electrically connected to the apparatus, the extension having a first surface for electrically coupling the apparatus to a voltage reference of a mounting board.
Claim 9
Dependent Claim
17 words
The apparatus of claim 7 wherein the extension is a spring finger integrally connected to the apparatus.
Claim 10
Dependent Claim
26 words
The apparatus of claim 7 wherein the extension is a tab having a screw hole for securing the apparatus to the mounting board with a screw.
Claim 11
Dependent Claim
87 words
A computer system comprising: an integrated circuit (IC) having an outer surface; a mounting board having a voltage reference, the IC being mounted to the mounting board; an electromagnetic shield thermally coupled to the outer surface, the electromagnetic shield being of a material with a yield strength of at least 80,000 pounds per square inch and with a thermal conductivity of at least 220 watts/meter*degree (Kelvin), the material being electrically conductive; wherein the electromagnetic shield is positioned to provide electromagnetic shielding and heat dissipation for the IC.
Claim 12
Dependent Claim
87 words
A computer system comprising: an integrated circuit (IC) having an outer surface; a mounting board having a voltage reference, the IC being mounted to the mounting board; an electromagnetic shield thermally coupled to the outer surface, the electromagnetic shield being of a material with a yield strength of at least 80,000 pounds per square inch and with a thermal conductivity of at least 220 watts/meter*degree (Kelvin), the material being electrically conductive; wherein the electromagnetic shield is positioned to provide electromagnetic shielding and heat dissipation for the IC.
Claim 13
Dependent Claim
37 words
The computer system of claim 10 further comprising: an extension electrically and mechanically connected to the electromagnetic shield, the extension contacting a first surface physically coupled to the mounting board and electrically coupled to the voltage reference.
Claim 14
Dependent Claim
18 words
The computer system of claim 11 wherein the extension is a spring finger connected to the electromagnetic shield.
Claim 15
Dependent Claim
15 words
The computer system of claim 10 wherein the integrated circuit is a central processing unit.
Claim 16
Dependent Claim
29 words
The computer system of claim 10 wherein the electromagnetic shield has a portion that is embossed, the embossed portion thermally coupled to the outer surface of the integrated circuit.
Claim 17
Dependent Claim
14 words
The computer system of claim 10 wherein the material is a beryllium copper alloy.
Claim 18
Dependent Claim
20 words
The computer system of claim 15 wherein the material has a Unified Numbering System (UNS) number of C17510 or C17410.
Claim 19
Dependent Claim
24 words
The computer system of claim 10 wherein the material is magnesium modified copper corson alloy having a Unified Numbering System (UNS) number of C7025.
Claim 20
Dependent Claim
34 words
The computer system of claim 10 wherein the electromagnetic shield has a generally planar portion extending over at least a majority of the mounting board including over the IC mounted on the mounting board.
Claim 21
Dependent Claim
14 words
The computer system of claim 10 wherein the voltage reference is a ground plane.
Claim 22
Dependent Claim
130 words
A computer system comprising: a printed circuit board having a ground plane and a first planar side; a central processing unit mounted on the first planar side of the printed circuit board, the central processing unit having an outer surface; a memory electrically coupled to the central processing unit; an electromagnetic shield thermally coupled to the outer surface, the electromagnetic shield being of a material with a yield strength of at least 80,000 pounds per square inch and with a thermal conductivity of at least 220 watts/meter*degree(Kelvin), the material being electrically conductive, the electromagnetic shield secured to the printed circuit board, the electromagnetic shield having a generally planar portion extending over at least a majority of the first planar side of the printed circuit board including the central processing unit.
Claim 23
Dependent Claim
130 words
A computer system comprising: a printed circuit board having a ground plane and a first planar side; a central processing unit mounted on the first planar side of the printed circuit board, the central processing unit having an outer surface; a memory electrically coupled to the central processing unit; an electromagnetic shield thermally coupled to the outer surface, the electromagnetic shield being of a material with a yield strength of at least 80,000 pounds per square inch and with a thermal conductivity of at least 220 watts/meter*degree(Kelvin), the material being electrically conductive, the electromagnetic shield secured to the printed circuit board, the electromagnetic shield having a generally planar portion extending over at least a majority of the first planar side of the printed circuit board including the central processing unit.
Claim 24
Dependent Claim
15 words
The computer system of claim 20 wherein the material is an alloy of beryllium copper.
Claim 25
Dependent Claim
20 words
The computer system of claim 20 wherein the material has a Unified Numbering System (UNS) number of C17510 or C17410.
Claim 26
Dependent Claim
25 words
The computer system of claim 20 wherein the material is a magnesium modified copper corson alloy having a Unified Numbering System (UNS) number of C7025.
Claim 27
Dependent Claim
37 words
The computer system of claim 20 further comprising: an extension electrically and mechanically connected to the electromagnetic shield, the extension contacting a first surface located on the first planar side and electrically coupled to the ground plane.
Claim 28
Dependent Claim
23 words
The computer system of claim 24 wherein the extension is a spring finger connected to a generally planar portion of the electromagnetic shield.
Claim 29
Dependent Claim
24 words
The computer system of claim 24 wherein the first surface is located on a surface mount technology (SMT) standoff on the printed circuit board.
Claim 30
Dependent Claim
40 words
The computer system of claim 20 further comprising: a housing enclosing the printed circuit board, the housing having an inner surface; an extension mechanically and electrically connected to the electromagnetic shield, the extension contacting the inner surface of the housing.
Claim 31
Dependent Claim
33 words
The computer system of claim 20 further comprising: a heat sink in thermal contact with the outer surface of the central processing unit, the heat sink in thermal contact with the electromagnetic shield.
Claim 32
Independent Claim
70 words
An apparatus for electrically coupling an electromagnetic shield to a voltage reference wherein: the apparatus is of a material with a yield strength of at least 80,000 pounds per square inch and with a thermal conductivity of at least 220 watts/meter*degree (Kelvin), the material being electrically conductive; and the apparatus is electrically connected to an electromagnetic shield and is electrically contacting a first surface electrically coupled to a voltage reference.
Claim 33
Independent Claim
70 words
An apparatus for electrically coupling an electromagnetic shield to a voltage reference wherein: the apparatus is of a material with a yield strength of at least 80,000 pounds per square inch and with a thermal conductivity of at least 220 watts/meter*degree (Kelvin), the material being electrically conductive; and the apparatus is electrically connected to an electromagnetic shield and is electrically contacting a first surface electrically coupled to a voltage reference.
Claim 34
Dependent Claim
25 words
The apparatus of claim 29 wherein the material is an alloy of beryllium copper with a Unified Numbering System (UNS) number of C17510 or C17410.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-04-11 | 2003-10-11 | 2004-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-11 | 2007-10-11 | 2008-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-11 | 2011-10-11 | 2012-04-11 | $7700.00 | Window Closed / Lapsed |