US5208733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enclosure and printed circuit card with heat sink
Assignee: Merlin Gerin SA
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Filing: 1991-10-30
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Granted: 1993-05-04
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Expires: 2011-10-30
Abstract
Abstract An electronic device including a card having first and second faces opposite each other, electrical devices including at least one of a printed circuit and a plurality of components fixed to the first face of the card, a metal plate spaced apart from the card such that a gap is formed therebetween, a pulp filled within the gap which is more thermally conductive than air, and a plastic insulating film disposed between the pulp and the card. The card, electrical components, the plastic insulating film and the metal plate form an integrated assembly.
Inventors
- 👤 Michel Besanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:53
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20536; H05K3/00; H05K3/22; H05K3/28; H05K3/284; H05K7/14; H05K7/1401; H05K7/1402; H05K7/1404
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
An electronic device comprising: a card having first and second faces opposite each other; electrical devices comprising at least one of a printed circuit and a plurality of components fixed to said first face of said card; a metal plate spaced apart from said card such that a gap is formed between said first face and said metal plate; pulp filled within said gap, wherein said pulp is more thermally conductive than air; and a plastic insulating film disposed between said pulp and said card, whereby an integrated assembly of said card, said electrical means, said plastic insulating film and said metal plate is formed.
Claim 2
Dependent Claim
105 words
An electronic device comprising: a card having first and second faces opposite each other; electrical devices comprising at least one of a printed circuit and a plurality of components fixed to said first face of said card; a metal plate spaced apart from said card such that a gap is formed between said first face and said metal plate; pulp filled within said gap, wherein said pulp is more thermally conductive than air; and a plastic insulating film disposed between said pulp and said card, whereby an integrated assembly of said card, said electrical means, said plastic insulating film and said metal plate is formed.
Claim 3
Dependent Claim
23 words
The device of claim 1, wherein said pulp completely fills said gap between said first face of said card and said metal plate.
Claim 4
Dependent Claim
33 words
The device of claim 1, wherein said pulp comprises a mixture of silicone resin and at least one of 10-80 wt % of aluminum nitride and 50-80 wt % of hydrated aluminum oxide.
Claim 5
Dependent Claim
19 words
The device of claim 1, wherein a plurality of card are fixed to said metal plate via said pulp.
Claim 6
Dependent Claim
40 words
The device of claim 1, further comprising an enclosure for housing said integrated assembly and a thermal connector connecting said metal plate of said integrated assembly to said enclosure to allow heat flow from said metal plate to said enclosure.
Claim 7
Dependent Claim
32 words
The device of claim 2, wherein said metal plate is fixed within a groove formed in a wall of said enclosure to ensure thermal contact between said metal plate and said enclosure.
Claim 8
Dependent Claim
37 words
The device of claim 2, further comprising cooling means to convection cool said enclosure, said cooling means comprising a heat sink connected to said enclosure such that heat is transferred from said enclosure to said heat sink.
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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) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |