Patent ID: 6700078
Filing Date: 2004-03-02
Classification: H05K,Y10T

Abstract:
An electrical structure, comprising:a substrate including a first selective plate core (SPC) sandwiched between a first laminate and a second laminate, wherein the first laminate includes a dielectric layer, wherein the second laminate includes a dielectric layer, wherein the first SPC includes a dielectric layer having a dielectric material that is platable, wherein the first SPC further includes a cylindrical segment of a dielectric material that is nonplatable, and wherein the cylindrical segment extends through a total thickness of the first SPC; and a first through hole through the substrate, wherein the cylindrical segment circumscribes a portion of the first through hole, wherein a metal plating on a wall of the first through hole: is plated to the first laminate, is plated to the second laminate, is not plated to the first SPC, and is not continuous from the first laminate to the second laminate, and wherein the thickness of the cylindrical segment in a direction oriented parallel to the first through hole does not exceed the thickness of the dielectric layer in said direction.