Inductor devices – Core forms casing
Patent
1998-08-25
2000-08-15
Gellner, Michael L.
Inductor devices
Core forms casing
336200, H01F 2702, H01F 500
Patent
active
061042722
ABSTRACT:
The present invention provides a system and method for producing a reliable inductor having an internal conductor with a small electric resistance. A metal wire formed in a nonlinear shape is used as the internal conductor. In an exemplary embodiment of the invention, the internal conductor has a coil-like shape with portions adjacent to each other with respect to the axial direction of the coil being positioned in a substantially cylindrical gap formed in the axial direction of the coil. By providing a gap around the internal conductor, stress between the internal conductor and a ceramic material surrounding the conductor can be eliminated. As a result, the characteristic deterioration or crack generation in the inductor chip is eliminated. Moreover, the leakage flux among the coil pitches of the conductor is reduced, thereby improving the characteristics of the inductor.
REFERENCES:
patent: 4597169 (1986-07-01), Chamberlin
patent: 5359311 (1994-10-01), Kawabata et al.
patent: 5428337 (1995-06-01), Vinclarelli et al.
patent: 5576680 (1996-11-01), Ling
patent: 5821843 (1998-10-01), Mamada et al.
Morimoto Tadashi
Yamamoto Takahiro
Gellner Michael L.
Mai Anh
Murata Manufacturing Co. Ltd.
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