Thin-film type common-mode choke coil

Details Thin-film type common-mode choke coil Thin-film type common-mode choke coil

2006-03-15

2008-11-18

Nguyen, Tuyen T. (Department: 2832)

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

Reexamination Certificate

active

07453343

ABSTRACT:
A thin-film type common-mode choke coil includes a laminated structure having a magnetic substrate; and electrically insulating layers and conductor layers laminated on the magnetic substrate in a direction of thickness, wherein said conductor layers form at least two coil conductors; at least two of the conductor layers are provided as spiral conductor patterns; and the spiral conductor patterns satisfy the expression: 5 μm≦W1≦36 μm in which W1is the conductor width of each of the spiral conductor patters. The spiral conductor patterns may also satisfy the expression: 100 μm2≦T*W1in which T is the conductor thickness of each of said spiral conductor patterns or satisfy the expression: W2<T×2 in which W2is the space between said spiral conductor patterns, and T is the conductor thickness of each of said spiral conductor patterns.

REFERENCES:
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patent: 2001/0051421 (2001-12-01), Watanabe
patent: 2002/0090755 (2002-07-01), Matsuzaki et al.
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patent: 2000-173824 (2000-06-01), None
patent: 2002-373810 (2002-12-01), None

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