Patent ID: 6964884

Claim:
A method of making a circuitized substrate comprising: providing a first electrically conductive layer with first and second opposing smooth sides; providing second and third electrically conductive layers each having a first smooth side and a second opposing side of a roughness greater than that of said first smooth sides of said second and third electrically conductive layers; treating said first, second and third electrically conductive layers with a chemical treatment so as to minimally increase said roughness of said first and second smooth sides of said first electrically conductive layer and said first smooth sides of said second and third electrically conductive layers; providing first and second dielectric layers; bonding said first and second dielectric layers to said first and second opposing smooth sides of said first electrically conductive layer, respectively, after said treating of said first electrically conductive layer with said chemical treatment; bonding said first smooth sides of said second and third electrically conductive layers to said first and second dielectric layers, respectively, after said treating of said first smooth sides of said second and third electrically conductive layers with said chemical treatment; and forming a circuit pattern within at least one of said second and third electrically conductive layers.