Inductive filters and methods of fabrication thereof

Details Inductive filters and methods of fabrication thereof Inductive filters and methods of fabrication thereof

2006-09-19

2006-09-19

Whitmore, Stacy A. (Department: 2825)

Computer-aided design and analysis of circuits and semiconductor

Nanotechnology related integrated circuit design

C716S030000

Reexamination Certificate

active

07111271

ABSTRACT:
A series of plated through hole (PTH) vias are interconnected by traces that alternate between a top surface and a bottom surface of a dielectric board. The PTH vias in the series can be positioned to create a collinear inductive filter, a coil-type inductive filter, or a transformer. Multiple, electrically isolated series of interconnected PTH vias can be used as a multi-phase inductive filter in one embodiment. In another embodiment, multiple series of interconnected PTH vias are electrically connected by a linking portion of conductive material, resulting in a low-resistance inductive filter. Ferromagnetic material patterns can be embedded in the dielectric board to enhance the inductive characteristics of the interconnected via structures. In one embodiment, a closed-end pattern is provided with two series of interconnected vias coiling around the pattern, resulting in an embedded transformer structure. A method of producing an interconnected series of PTH vias includes providing a dielectric board having a series of holes. In some embodiments, the board includes an embedded ferromagnetic material pattern. The holes and the top and bottom surface of the dielectric board have a conductive material thereupon. Portions of the conductive material are selectively removed, resulting in the embedded inductive filter and/or transformer structure.

REFERENCES:
patent: 4891789 (1990-01-01), Quattrini et al.
patent: 5708569 (1998-01-01), Howard et al.
patent: 5745981 (1998-05-01), Roshen et al.
patent: 5781091 (1998-07-01), Krone et al.
patent: 5889319 (1999-03-01), Moller et al.
patent: 6057600 (2000-05-01), Kitazawa et al.
patent: 6148500 (2000-11-01), Krone et al.
patent: 6175727 (2001-01-01), Mostov
patent: 6229124 (2001-05-01), Trucco
patent: 6696910 (2004-02-01), Nuytkens et al.
patent: 6720502 (2004-04-01), Alcoe et al.
patent: 6740222 (2004-05-01), Cohn

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