Patent ID: 6586685
Filing Date: 2003-07-01
Classification: B41M,H01L,H05K,Y10S,Y10T

Abstract:
A printed circuit board comprising:a printed circuit substrate; a first wiring pattern, made from a paste or a fused metal, and formed on a surface of a front side or a back side of said printed circuit substrate; and a second wiring pattern, made from a paste or a fused metal, and formed in contact with said surface and so as to cross said first wiring pattern, thereby forming at least one of a junction portion of said first wiring pattern and said second wiring pattern and a crossover portion of said first wiring pattern and said second wiring pattern with a resistive coating interposed between said first and second wiring patterns in said crossover portion, wherein at least one of said first wiring pattern and said second wiring pattern has a rectangular shaped cross-section with an aspect ratio of a thickness to a width of the cross-section being greater than 1:1, said first and second wiring patterns form a cross-over portion and said resistive coating is a localized thin film resistive coating interposed between said first wiring pattern and said second wiring pattern and confined only to said cross-over portion, and said resistive coating consists of an insulating material having a substantially uniform composition.