Patent ID: 6317965
Filing Date: 2001-11-20
Classification: H02M,H03H,Y10T

Abstract:
A method for manufacturing a noise-cut filter, comprising the steps of:forming first and second spiral coil patterns on opposite surfaces of a first dielectric sheet, such that said first and second spiral coil patterns are aligned with each other in a direction perpendicular to a plane of said first dielectric sheet, said first and second spiral coil patterns being formed from a conductive paste;forming a first main circuit pattern by bonding a first main circuit conductor to said first spiral coil pattern formed on one of the opposite surfaces of said first dielectric sheet, said first main circuit conductor having a cross sectional area large enough to allow a desired level of current to flow therethrough, and having substantially the same shape as said first spiral coil pattern;bonding a first grounding wire to said second spiral coil pattern formed on the other surface of said first dielectric sheet remote from said first main circuit pattern;forming third and fourth spiral coil patterns on opposite surfaces of a second dielectric sheet, such that said third and fourth spiral coil patterns are aligned with each other in a direction perpendicular to a plane of said second dielectric sheet, said third and fourth spiral coil patterns being formed from a conductive paste;forming a second main circuit pattern by bonding a second main circuit conductor to said third spiral coil pattern formed on one of the opposite surfaces of said second dielectric sheet, said second main circuit conductor having a cross sectional area large enough to allow a desired level of current to flow therethrough, and having substantially the same shape as said third spiral coil pattern;bonding a second grounding wire to said fourth spiral coil pattern formed on the other surface of said second dielectric sheet remote from said second main circuit pattern; andinterposing an insulating sheet between said first dielectric sheet carrying said first main circuit pattern and said first grounding wire, and said second dielectric sheet carrying said second main circuit pattern and said second grounding wire;wherein one end of said first main circuit conductor is connected to one end of said second main circuit conductor, such that the other ends of said first and second main circuit conductors are used as an input terminal and an output terminal, respectively; andwherein said first dielectric sheet carrying said first main circuit pattern and said first grounding wire is integrated with said second dielectric sheet carrying said second main circuit pattern and said second grounding wire, thereby to provide a noise-cut filter.