Patent ID: 7977034

Claim:
A method of making a plurality of circuitized substrates, said method comprising: providing a first conductive layer on a roll, said first conductive layer having first and second opposing surfaces; forming holes within said first conductive layer which extend through the thickness of said first conductive layer; depositing photoimageable dielectric material on said first and second opposing surfaces of said first conductive layer and within said holes extending through said thickness of said first conductive layer; forming first and second patterns within said photoimageable dielectric material on said opposing surfaces of said first conductive layer, respectively, each of said patterns including openings therein which align with said holes within said first conductive layer; providing electrically conductive material within said openings and on selected parts of the external surfaces of said photoimageable material on said first and second opposing surfaces of said first conductive layer, respectively, to render said openings electrically conductive and to form circuit patterns on said selected parts of said surfaces of said photoimageable material; and thereafter segmenting said first conductive layer, said photoimageable material on said opposing surfaces of said first conductive layer, and said circuit patterns on said photoimageable material to define a plurality of circuitized substrates each having a pattern of conductive thru-holes therein, all of said steps being performed while said first conductive layer is in the form of a continuous, solid member unwound from said roll.