Planar coil and planar transformer, and process of fabricating a high-aspect conductive device
AssigneeTDK Corporation
InventorTakashi Kajino
Life of this patent
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Abstract
A planar coil including and insulating substrate, and a coil conductive filament having a thickness of 20 to 400 μm and formed on at least one surface of the insulating substrate, the coil conductive filament having a gap whose aspect ratio (H/G) is at least 1. The coil conductive filament has a cross-section in a substantially mushroom shape having a head and a neck, the head has a width (L) which is a least twice as large as a width (l) of the neck thereof, at most 1.5 times as large as a height of the head, and at least twice as large as a minimum spacing (G) between adjacent coil conductive filaments.
Claims8
A planar coil comprising:
- an insulating substrate;
- and
- a coil conductive filament having a thickness of 20 to 400-μm and formed on at least one surface of said insulating substrate, said coil conductive filament having a gap whose aspect ratio (H/G) is at least 1;
- wherein said coil conductive filament has a cross-section in a substantially mushroom shape having a neck and a substantially quadrilateral head formed on said neck, said substantially quadrilateral head has a width (L) which is at least twice as large as a width (l) of said neck thereof, at most 1.5 times as large as a height of said substantially quadrilateral head, and at least twice as large as a minimum spacing (G) between adjacent coil conductive filaments.
A planar coil comprising:
- an insulating substrate;
- and
- a coil conductive filament having a thickness of 20 to 400-μm and formed on at least one surface of said insulating substrate, said coil conductive filament having a gap whose aspect ratio (H/G) is at least 1;
- wherein said coil conductive filament has a cross-section in a substantially mushroom shape having a neck and a substantially quadrilateral head formed on said neck, said substantially quadrilateral head has a width (L) which is at least twice as large as a width (l) of said neck thereof, at most 1.5 times as large as a height of said substantially quadrilateral head, and at least twice as large as a minimum spacing (G) between adjacent loops of said coil conductive filament.
Dependencies are inferred from the claim text.