Patent ID: 6986198

Claim:
A method of forming a printed circuit card comprising the steps of: providing a layer of metal having opposite sides, forming at least one opening through said layer of metal, providing first and second layers of photoimageable material on opposite sides of said layer of metal, photopatterning and developing said first and second layers of said photoimageable meterial to form an opening extending through both layers of said photoimageable material and said at least one opening in said metal layer and which openings in said photoimageable layers are smaller than the opening in said layer of metal, forming at least one via in at least one layer of photoimageable material that terminates at said layer of metal, circuitizing the exposed surface of each of said layers of photoimageable material with circuitry and depositing metal in said at least one hole in said photoimageable material and in said at least one via.