Patent ID: 6664485
Filing Date: 2003-12-16
Classification: B32B,H05K,Y10T

Abstract:
A printed wiring board comprising:(a) a dielectric substrate having upper and lower surfaces; (b) at least one landless filled plated through hole disposed through the substrate from the upper to the lower surface, the through hole having a first diameter; (c) the through hole further comprising an inner surface extending from the upper to the lower surface, the inner surface plated with a conductive metal plating, the inner surface plating having an upper end aligned with the substrate upper surface and a lower end aligned with the substrate lower surface; (d) the through hole filled with a filler composition having upper and surfaces, wherein the filler composition upper surface is aligned with the dielectric substrate upper surface and the through hole inner surface plating upper end, the filler composition upper surface, substrate upper surface and inner surface plating upper end thereby defining a smooth upper subcomposite surface; and (e) an additively plated unetched first circuitry line having a bottom surface plated directly onto the at least one plated through hole inner surface plating upper end and said upper subcomposite surface and thereby electrically connected to said plated through hole, the first circuitry line further comprising a top surface, the first circuitry line bottom surface and first circuitry line top surface having a common line width approximately equal to or less than the first diameter.