US3912849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite printed circuit board
Assignee: RCA Licensing Corp
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Filing: 1974-09-09
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Granted: 1975-10-14
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Expires: 1994-09-09
Abstract
Abstract An insulating board and a sheet metal board are laminated together, with the metal board covering only a part of the mounting surface of the insulating board. Low-power circuit components are mounted on the exposed face of the insulating board, and high-power circuit elements are mounted on the metal board.
Inventors
- 👤 Lucius Ponder Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:47
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/0201; H05K1/0203; H05K1/0213; H05K1/0216; H05K1/0218; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039; H05K2201/00; H05K2201/09; H05K2201/09818; H05K2201/09972; H05K2201/10; H05K2201/10431; H05K2201/10553; H05K2201/10613; H05K2201/10954; H05K2201/10969; H05K2201/20; H05K2201/2036; H05K2203/00; H05K2203/30; H05K2203/302; H05K3/00; H05K3/30; H05K3/306; H05K3/40; H05K3/4092; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49126; Y10T29/4913
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
A printed circuit composite board for use in an electronic apparatus chassis, comprising: an insulating board having top and bottom surfaces and a sheet metal board, said boards being laminated together with said metal board resting on said top surface of said insulating board, said metal board having an area which is less than that of said insulating board, whereby said insulating board has part of its top surface exposed, a network of electrical conductors adhered to surfaces of said insulating board, means on said insulating board for mounting circuit components thereon, means on said metal board for mounting circuit components thereon, means for electrically shielding one part of an electronic circuit from another, which comprise at least one bent-up portion of said metal, and means attached to said shield means for mounting circuit components thereon.
Claim 2
Dependent Claim
136 words
A printed circuit composite board for use in an electronic apparatus chassis, comprising: an insulating board having top and bottom surfaces and a sheet metal board, said boards being laminated together with said metal board resting on said top surface of said insulating board, said metal board having an area which is less than that of said insulating board, whereby said insulating board has part of its top surface exposed, a network of electrical conductors adhered to surfaces of said insulating board, means on said insulating board for mounting circuit components thereon, means on said metal board for mounting circuit components thereon, means for electrically shielding one part of an electronic circuit from another, which comprise at least one bent-up portion of said metal, and means attached to said shield means for mounting circuit components thereon.
Claim 3
Dependent Claim
67 words
A circuit board according to claim 1 wherein two portions of said metal board are vent vertically to said insulating board and parallel to each other, defining an area on said metal board and said insulating board between said vertical metal portions, an opening through said metal board and through said insulating board between said vertically bent portions permitting circulation of air between said vertical metal portions.
Claim 4
Dependent Claim
24 words
A circuit board according to claim 1 wherein said metal board includes a frame portion extending entirely around the periphery of said insulating board.
Claim 5
Dependent Claim
20 words
A circuit board according to claim 3 wherein said frame portion includes means attached thereto for mounting circuit components thereon.
Claim 6
Dependent Claim
31 words
A circuit board according to claim 1 wherein low-power circuit components are mounted on the exposed face of said insulating board, and high-power circuit elements are mounted on said metal board.
Claim 7
Dependent Claim
136 words
A printed circuit composite board for use in an electronic apparatus chassis, comprising: an insulating board having top and bottom surfaces and a sheet metal board, said boards being laminated together, and said metal board having an area which is less than that of said insulating board, whereby said insulating board has part of its top surface exposed, a network of electrical conductors adhered to surfaces of said insulating board, means on said insulating board for mounting circuit components thereon, means on said metal board for mounting circuit components thereon, said metal board including at least one bent-up portion and a frame portion which has means for mounting circuit components thereon, said frame portion extending entirely around the periphery of said insulating board, and said frame portion having a shield means comprising a bent-up metal portion.
Claim 8
Dependent Claim
136 words
A printed circuit composite board for use in an electronic apparatus chassis, comprising: an insulating board having top and bottom surfaces and a sheet metal board, said boards being laminated together, and said metal board having an area which is less than that of said insulating board, whereby said insulating board has part of its top surface exposed, a network of electrical conductors adhered to surfaces of said insulating board, means on said insulating board for mounting circuit components thereon, means on said metal board for mounting circuit components thereon, said metal board including at least one bent-up portion and a frame portion which has means for mounting circuit components thereon, said frame portion extending entirely around the periphery of said insulating board, and said frame portion having a shield means comprising a bent-up metal portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |