Thin-film common mode filter and thin-film common mode...

Details Thin-film common mode filter and thin-film common mode... Thin-film common mode filter and thin-film common mode...

2006-04-04

2006-04-04

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S181000, C336S200000

Reexamination Certificate

active

07023299

ABSTRACT:
A thin-film common mode filter is provided, comprising: a pair of magnetic plates; upper/lower coil conductors formed between the magnetic plates, spirally wound in the magnetic plate surface direction, overlapped each other; upper/lower lead conductors one ends of which are connected electrically to one ends in centers of the upper/lower coil conductors, respectively, extended to external portions across these coil conductors; an upper/lower lead drawing terminals to which the other ends of the upper/lower lead conductors are connected, respectively; an upper/lower coil drawing terminals to which the other ends of the upper/lower coil conductors are connected, respectively; and each of the lower lead/coil drawing terminals and the upper coil/lead drawing terminals having a structure where at least two of conductor layers to be patterned into the upper/lower lead conductors and the upper/lower coil conductors are stacked, and brought into conduction with each other.

REFERENCES:
patent: 6384705 (2002-05-01), Huang et al.
patent: 6618929 (2003-09-01), Kitamura
patent: 6710694 (2004-03-01), Matsuta et al.
patent: 04-364709 (1992-12-01), None
patent: 08-203737 (1996-08-01), None
patent: 08-335517 (1996-12-01), None
patent: 11-054326 (1999-02-01), None

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