US6081028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal management enhancements for cavity packages
Assignee: Sun Microsystems Inc
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Filing: 1995-08-11
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Granted: 2000-06-27
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Expires: 2015-08-11
Abstract
Abstract A thermal conducting material for providing lateral thermal conduction across a surface of an integrated circuit and for enhancing thermal dissipation from the integrated circuit. The integrated circuit is incorporated within a semiconductor device having a cavity package. A layer of the thermal conducting material, preferably electrically non-conductive, is disposed on a surface of an integrated circuit in the form of a die to provide lateral heat conduction to reduce the number of hot spots within the integrated circuit. Alternatively, the thermal conducting, electrically non-conductive material may be used to fill a cavity within the cavity package so that the cavity package dissipates heat in a more effective manner.
Inventors
- 👤 Ehsan Ettehadieh
- 👤 Sunil Kaul
- 👤 Dev Malladi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:16
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/70; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554; H10W72/50; H10W72/541; H10W72/547; H10W72/90; H10W72/951; H10W90/00; H10W90/701; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
90 words
A semiconductor device comprising: a package having a ceramic lid covering a cavity having a predetermined depth; an integrated circuit placed within the package, the integrated circuit having a first surface including at least one wire bond attached thereto, and a layer of thermal conducting material disposed directly across the first surface of the integrated circuit to maintain the first surface of the integrated circuit at a substantially uniform surface temperature, a thickness of the layer of the thermal conducting material being less than one-half the depth of the cavity.
Claim 2
Dependent Claim
90 words
A semiconductor device comprising: a package having a ceramic lid covering a cavity having a predetermined depth; an integrated circuit placed within the package, the integrated circuit having a first surface including at least one wire bond attached thereto, and a layer of thermal conducting material disposed directly across the first surface of the integrated circuit to maintain the first surface of the integrated circuit at a substantially uniform surface temperature, a thickness of the layer of the thermal conducting material being less than one-half the depth of the cavity.
Claim 3
Dependent Claim
23 words
The semiconductor device according to claim 1, wherein the at least one wire bond is attached to a lead of the semiconductor device.
Claim 4
Dependent Claim
15 words
The semiconductor device according to claim 2, wherein the thermal conducting material is electrically non-conductive.
Claim 5
Dependent Claim
28 words
The semiconductor device according to claim 3, wherein the thermal conducting material is selected from a group consisting of diamond particles, alumina, aluminum nitride beryllium oxide and quartz.
Claim 6
Dependent Claim
33 words
The semiconductor device according to claim 3 further comprising a thermal transfer device affixed to the semiconductor device package, the thermal transfer device being proximate to a second surface of the integrated circuit.
Claim 7
Dependent Claim
16 words
The semiconductor device according to claim 5, wherein the thermal transfer device comprises a heat slug.
Claim 8
Dependent Claim
111 words
A computer system comprising a circuit board; and a semiconductor device coupled to the circuit board via a plurality of leads, the semiconductor device including a package having the plurality of leads and a cavity, an integrated circuit encapsulated within the cavity, and a ceramic lid covering the cavity, the integrated circuit having a layer of thermal conducting material disposed directly on a first surface of the integrated circuit including a plurality of wire bonds coupled to the plurality of leads the layer of thermal conducing material having a thickness less than one-half of a depth of the cavity in order to maintain a substantially uniform temperature across the first surface.
Claim 9
Dependent Claim
111 words
A computer system comprising a circuit board; and a semiconductor device coupled to the circuit board via a plurality of leads, the semiconductor device including a package having the plurality of leads and a cavity, an integrated circuit encapsulated within the cavity, and a ceramic lid covering the cavity, the integrated circuit having a layer of thermal conducting material disposed directly on a first surface of the integrated circuit including a plurality of wire bonds coupled to the plurality of leads the layer of thermal conducing material having a thickness less than one-half of a depth of the cavity in order to maintain a substantially uniform temperature across the first surface.
Claim 10
Dependent Claim
15 words
The computer system according to claim 7, wherein the thermal conducting material is electrically non-conductive.
Claim 11
Dependent Claim
20 words
The computer system according to claim 8, wherein the at least one semiconductor device is a processor for processing information.
Claim 12
Dependent Claim
22 words
The computer system according to claim 8, wherein the at least one semiconductor device is a memory element for storing information therein.
Claim 13
Dependent Claim
18 words
The computer system according to claim 8, wherein the at least one semiconductor device is an input/output device.
Claim 14
Dependent Claim
26 words
The computer system according to claim 8, wherein the semiconductor device further comprises a thermal transfer device for enhancing thermal dissipation capabilities of the semiconductor device.
Claim 15
Dependent Claim
40 words
The computer system according to claim 12, wherein the thermal transfer device comprises a heat slug proximate to a second surface of the integrated circuit for conducting heat from the integrated circuit and a heat sink for dissipating the heat.
Claim 16
Dependent Claim
28 words
The computer system according to claim 8, wherein the thermal conducting material is selected from a group consisting of diamond particles, alumina, aluminum nitride, beryllium oxide and quartz.
Claim 17
Dependent Claim
24 words
The computer system according to claim 7, wherein the layer of thermally conducting material is less than or equal to ten millimeters in thickness.
Claim 18
Dependent Claim
16 words
The computer system according to claim 7, wherein the package includes a Ball Grid Array package.
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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) | 2003-06-27 | 2003-12-27 | 2004-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-06-27 | 2007-12-27 | 2008-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-06-27 | 2011-12-27 | 2012-06-27 | $7700.00 | Window Closed / Lapsed |