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US5334330A
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Anisotropically electrically conductive composition with thermal dissipation capabilities
Assignee: Whitaker LLC
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Filing: 1990-03-30
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Granted: 1994-08-02
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Expires: 2010-03-30
Abstract
Abstract An anisotropically electrically conductive composition having the capability to conduct heat isotropically when used as an electrical interconnection medium between a pair of electrical conductors, paths, traces, or the like. The composition comprises a mixture of electrically conductive particles in an amount below the percolation threshold for volume conduction for such composition, and electrically non-conductive, but thermally conductive particles, such as metallic oxides, within a polymeric matrix. Preferably, the conductive particles are present in an amount of no more than about 15%, by volume, and the electrically non-conductive particles are present in an amount of about 15 to 35%, by volume.
Inventors
- 👤 John R. Rowlette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:28
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/22; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/321; H05K3/323; H05K1/00; H05K1/02; H05K1/0201; H05K1/0203; H05K2201/00; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/26; Y10T428/269
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
An anisotropically electrically conductive composition having the capability to more efficiently conduct heat anisotropically when used as an electrical interconnection medium between a pair of electrical conductors, said composition comprising a mixture of electrically conductive particles in an amount below the percolation threshold for volume conduction for such composition, and electrically non-conductive, but thermally conductive particles, within a polymeric matrix, where said particles are present in an amount of no more than 50% by volume, with the minimum amounts of each being those amounts sufficient to render said composition electrically and thermally conductive.
Claim 2
Dependent Claim
93 words
An anisotropically electrically conductive composition having the capability to more efficiently conduct heat anisotropically when used as an electrical interconnection medium between a pair of electrical conductors, said composition comprising a mixture of electrically conductive particles in an amount below the percolation threshold for volume conduction for such composition, and electrically non-conductive, but thermally conductive particles, within a polymeric matrix, where said particles are present in an amount of no more than 50% by volume, with the minimum amounts of each being those amounts sufficient to render said composition electrically and thermally conductive.
Claim 3
Dependent Claim
44 words
The anisotropically electrically conductive composition according to claim 1 wherein said electrically conductive particles are present in an amount of no more than about 15%, by volume, and said electrically non-conductive particles are present in an amount of about 15 to 35%, by volume.
Claim 4
Dependent Claim
29 words
The anisotropically electrically conductive composition according to claim 2 wherein said electrically non-conductive particles are metallic oxides having a particle size distribution with an average of about 1 micron.
Claim 5
Dependent Claim
20 words
The anisotropically electrically conductive composition according to claim 3 wherein said electrically non-conductive particles are Al 2 O 3 .
Claim 6
Dependent Claim
24 words
The anisotropically electrically conductive composition according to claim 2 wherein said electrically conductive particles are present in an amount between about 10 to 12%.
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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) | 1997-08-01 | 1998-01-31 | 1998-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-01 | 2002-01-31 | 2002-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-01 | 2006-01-31 | 2006-08-02 | $7700.00 | Window Closed / Lapsed |