US3766439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic module using flexible printed circuit board with heat sink means
Assignee: General Electric Co
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Filing: 1972-01-12
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Granted: 1973-10-16
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Expires: 1992-01-12
Abstract
Abstract An electronic circuit component having particular utility in multi-layer circuit board construction formed essentially of a flexible dielectric sheet of material used as the board base to which is attached circuit runs etched from copper sheets clad to the dielectric sheet prior to etching. Generally, circuitry runs are separated according to alignment with either the X or Y axis with the runs on each side of the dielectric sheet being parallel to only one of those axes. Integration of communication between X and Y runs is by means of plated through holes to which circuit elements may be attached. Flatpack integrated circuits are attached to the board oriented with their covers toward and their heat sink base portions away from the board. By placing all flatpacks on one side of the flexible board structure and looping the structure back on itself, a high circuit component density can be achieved with the heat sink portions of flatpacks exposed exteriorly of the loops of the structure facilitating placing the flatpacks in heat conducting contact with a casing.
Inventors
- 👤 H Isaacson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20536; H05K7/20545; H05K1/00; H05K1/18; H05K1/189; H05K1/02; H05K1/0201; H05K1/0203; H05K2201/00; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; H05K2201/04; H05K2201/042; H05K2201/10; H05K2201/10007; H05K2201/10189; H05K2201/10613; H05K2201/10621; H05K2201/10689
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
An electronic module comprising: a. a relatively thin, substantially flexible, dielectric base printed circuit board looped into a plurality of convolutions; b. electronic components mounted on the exteriors of said convolutions of said board, said components having heat sink surfaces and being mounted with said heat sink surfaces facing away from said board; c. a connector strip attached to said board and holding said board in its convoluted configuration; and d. a case made of materials selected for their thermal conductive qualities and having a plurality of compartments of the same number as there are convolutions in said board, said board in its convoluted condition being removably secured in said case with one loop in each said compartment with said heat sink surfaces of said electronic components being in heat transfer contact with said case.
Claim 2
Dependent Claim
135 words
An electronic module comprising: a. a relatively thin, substantially flexible, dielectric base printed circuit board looped into a plurality of convolutions; b. electronic components mounted on the exteriors of said convolutions of said board, said components having heat sink surfaces and being mounted with said heat sink surfaces facing away from said board; c. a connector strip attached to said board and holding said board in its convoluted configuration; and d. a case made of materials selected for their thermal conductive qualities and having a plurality of compartments of the same number as there are convolutions in said board, said board in its convoluted condition being removably secured in said case with one loop in each said compartment with said heat sink surfaces of said electronic components being in heat transfer contact with said case.
Claim 3
Dependent Claim
136 words
An electronic module comprising: a. a thin, pliable, easily flexed printed circuit board loosely folded to form one or more loops; b. electronic components mounted on the board on oppositely facing exterior surfaces of each of said one or more loops with said electronic components having outwardly facing heat sink portions; c. a connector strip attached to said board, holding said board in its looped configuration and having conductors extending through said connector strip from connection to said circuit board on one end to terminal pins on the other end; and d. a casing surrounding said looped board and attached to said connector strip whereby said heat sink portions of said components make heat transfer contact with said casing and whereby said terminal pins of said conductors pRotruding from said connector strip form a male socket.
Claim 4
Dependent Claim
136 words
An electronic module comprising: a. a thin, pliable, easily flexed printed circuit board loosely folded to form one or more loops; b. electronic components mounted on the board on oppositely facing exterior surfaces of each of said one or more loops with said electronic components having outwardly facing heat sink portions; c. a connector strip attached to said board, holding said board in its looped configuration and having conductors extending through said connector strip from connection to said circuit board on one end to terminal pins on the other end; and d. a casing surrounding said looped board and attached to said connector strip whereby said heat sink portions of said components make heat transfer contact with said casing and whereby said terminal pins of said conductors pRotruding from said connector strip form a male socket.
Claim 5
Dependent Claim
113 words
An electronic module comprising: a. a thin, pliable, easily flexed printed circuit board loosely folded into one or more loops; b. electronic components mounted on the board on oppositely facing exterior surfaces of each of said one or more loops with said electronic components having outwardly facing heat sink portions; c. a connector strip attached to said board; and d. a case made of materials selected for heat conduction and transfer qualities and having a separate compartment for each said loop into which the board is folded, said case surrounding and containing said board in its convoluted condition whereby the heat sink portions of said components make heat transfer contact with said case.
Claim 6
Dependent Claim
113 words
An electronic module comprising: a. a thin, pliable, easily flexed printed circuit board loosely folded into one or more loops; b. electronic components mounted on the board on oppositely facing exterior surfaces of each of said one or more loops with said electronic components having outwardly facing heat sink portions; c. a connector strip attached to said board; and d. a case made of materials selected for heat conduction and transfer qualities and having a separate compartment for each said loop into which the board is folded, said case surrounding and containing said board in its convoluted condition whereby the heat sink portions of said components make heat transfer contact with said case.
References Cited (Backward Citations)
US2892131A
Cited
US3039177A
Cited
US2997521A
Cited
US3255299A
Cited
US3475657A
Cited
US3499220A
Cited
DE1908445A1
Cited
US3522486A
Cited
US3582865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |