Inductor devices – Windings – Having conductor of particular shape
Patent
1999-04-06
2000-03-21
Gellner, Michael L.
Inductor devices
Windings
Having conductor of particular shape
336206, 336200, 336232, H01F 500, H01F 2728
Patent
active
060407530
ABSTRACT:
A low-profile transformer or inductor includes a leg of a magnetically permeable core. A tube-type winding arrangement is made by use of a flat, flexible dielectric sheet, on one side of which a broad conductive area is affixed, and on the other side of which a plurality of mutually parallel elongated regions are affixed. The dielectric sheet is rolled into a tube defining a parting line which is perpendicular to the axes of elongation of the conductive strips. The discontinuous elongated strips are formed into a continuous winding by means of stitches. The stitches may be through vias extending through overlapping regions of the tube to interconnect ends of the strip conductors, or may be generated by an HDI conductor overlying the ends of the strip conductors, with through vias making connections to the ends of the strip conductors and to HDI conductors.
REFERENCES:
patent: 3719911 (1973-03-01), Tomita
patent: 4342976 (1982-08-01), Ryser
patent: 4383235 (1983-05-01), Layton et al.
patent: 4509109 (1985-04-01), Hansen
patent: 5525951 (1996-06-01), Sunano et al.
patent: 5561410 (1996-10-01), Toki
"A Comparative Study of Low-Profile Power Magnetics for High-Frequency, High-Density Switching Converters", by Ramakrishnan et al., published at pp. 388-394 of vol. 1 of APEC '97, the proceedings of the Annual Applied Power Electronics Conference & Exposition, sponsored by the IEEE, Feb. 23-27, 1997.
Bicknell William Hull
Ramakrishnan Sriram
Steigerwald Robert Louis
Gellner Michael L.
Lockheed Martin Corp.
Mai Anh
Meise W. H.
Weinstein S. D.
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