US3764856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer in electronic equipment
Assignee: Massachusetts Institute of Technology
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Filing: 1972-05-17
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Granted: 1973-10-09
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Expires: 1992-05-17
Abstract
Abstract Heat is conducted from electronic packages or modules by extending the leads of the packages or modules through a mother board, to which the leads are electrically connected, into thermal contact with a thermal sink, and particularly, into an electrically insulating and thermally conducting member (such as a beryllia or alumina block) in thermal contact with the thermal sink.
Inventors
- 👤 J Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:18
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/0201; H05K1/0203; H05K1/0204; H05K7/00; H05K7/20; H05K7/2039; H05K7/205; H10; H10W; H10W40/00; H10W40/10; H05K2201/00; H05K2201/10; H05K2201/10227; H05K2201/10295; H05K2201/10303; H05K2201/10613; H05K2201/10621; H05K2201/10689; H05K3/00; H05K3/0058; H05K3/0061; H05K3/30; H05K3/32; H05K3/34; H05K3/341; H05K3/3421; H05K3/40; H05K3/4007; H05K3/4015
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
146 words
An electronic assembly comprising: a plurality of heat-dissipating electrical components, a plurality of electrically conductive leads, an electrically insulating and thermally conducting circuit board having a plurality of connector pins attached to the board around its periphery, said electrical components and their leads being connected to each other and to said connector pins by said leads, said components, leads, and connector pins being in good thermal contact with said thermally conducting circuit board, a thermally conductive and electrically insulative block, a heat sink in good thermal contact with said block, said connector pins of said circuit board in good thermal contact with said block and having good thermal conductivity, whereby the heat generated is carried from said components through the circuit board and its connecting pins to a heat sink while allowing said connecting pins to be at different electrical potentials and insulated from one another.
Claim 2
Dependent Claim
146 words
An electronic assembly comprising: a plurality of heat-dissipating electrical components, a plurality of electrically conductive leads, an electrically insulating and thermally conducting circuit board having a plurality of connector pins attached to the board around its periphery, said electrical components and their leads being connected to each other and to said connector pins by said leads, said components, leads, and connector pins being in good thermal contact with said thermally conducting circuit board, a thermally conductive and electrically insulative block, a heat sink in good thermal contact with said block, said connector pins of said circuit board in good thermal contact with said block and having good thermal conductivity, whereby the heat generated is carried from said components through the circuit board and its connecting pins to a heat sink while allowing said connecting pins to be at different electrical potentials and insulated from one another.
Claim 3
Dependent Claim
84 words
The assembly of claim 1 comprising in addition: a wiring board substantially in parallel relation to said circuit board, said wiring board being located between said thermally conductive block and said circuit board, said wiring board having a plurality of connector pins corresponding to the pins of the circuit board, said circuit board connector pins being thermally connected to said thermally conductive block by the corresponding connector pins of the wiring board, said connector pins being substantially transverse to the planes of the boards.
Claim 4
Dependent Claim
24 words
The assembly of claim 2 wherein said wiring board connector pins terminate within said thermally conductive block without penetrating the thickness of said block.
Claim 5
Dependent Claim
43 words
The assembly of claim 3 wherein said thermally conductive block has pins in good thermal contact therewith, said pins corresponding to the pins of said circuit board, said block pins being thermally connected to the circuit board pins through said wiring board pins.
Claim 6
Dependent Claim
38 words
The assembly of claim 2 comprising in addition: a plurality of said circuit boards with their connector pins, said boards being stacked and having their corresponding connector pins in good electrical and good thermal contact with each other.
Claim 7
Dependent Claim
63 words
The assembly of claim 5 wherein said wiring board has female connector blocks mounted thereon, said connector blocks containing connector cups corresponding to the connector pins adapted to removably secure the connector pins of the circuit board nearest it in good electrical and good thermal contact, said connector cups being in good thermal contact with corresponding pins mounted in said thermally conductive block.
Claim 8
Dependent Claim
42 words
The assembly of claim 3 wherein said heat sink is an electrically conductive metal, said metal being in mechanical contact with said electrically insulating thermally conducting block on the face of said block opposite that which is penetrated by the conducting pins.
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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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |