Inductor devices – With electric and/or magnetic shielding means
Patent
1986-11-18
1988-07-05
Kozma, Thomas J.
Inductor devices
With electric and/or magnetic shielding means
336180, 336182, 336200, 336223, H01F 1504, H01F 2728
Patent
active
047557834
ABSTRACT:
Inductive devices, i.e., transformers, coils, inductors, etc. are produced from a rolled flexible circuit. The flexible circuit is comprised of a dielectric substrate having a circuit pattern thereon. The circuit pattern is configured such that, upon rolling, one or more coils is formed thereby defining an inductor, transformer, etc. Additionally, these inductive devices may be easily shielded using a ground plane in the flexible circuit. The rolled flexible circuit may be secured in several ways including an adhesive or by using a thermoplastic bonding layer which acts to heat seal the circuit together. The inductive devices of the present invention may be wrapped or rolled about a permeable core which improves inductance. Inductor devices manufactured in accordance with the present invention have the advantages of being small, surface mountable, inexpensive to manufacture and being capable of insertion onto printed wiring boards using automated insertion equipment. The small size of the inductor devices permit the present invention to take up only small areas on the circuit board thereby conserving valuable "real estate" on the printed wiring board.
REFERENCES:
patent: 2440652 (1948-04-01), Beverly
patent: 3102245 (1963-08-01), Lawson, Jr.
patent: 3267402 (1966-08-01), Reimer
patent: 3886510 (1975-05-01), Canup et al.
patent: 4268810 (1981-05-01), Iwasa et al.
patent: 4308513 (1981-12-01), Layton et al.
"High Power, High Voltage, Audio Frequency Transformer Design Manual", J. G. Howe et al, Aug. 31, 1964, pp. 185, 188, 189.
IBM Technical Disclosure Bulletin, "Flexible Circuit Solenoid," Gonnella et al, vol. 16, No. 9, Feb. 1974, p. 3008.
Fleischer Cathy
Harper William
Johnston Joseph E.
Simpson Scott
Traskos Richard T.
Kozma Thomas J.
Rogers Corporation
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