A sequentially laminated printed circuit board having highly reliable vias
can be fabricated by pattern plating flanges or via lands on a copper
foil, laminating the foil to a prepreg so that the flanges are embedded
into the surface of the prepreg, creating via holes in the laminate that
are substantially concentric with the individual flanges, plating the via
holes with copper, chemically or mechanically milling off a portion of
the copper plating and optionally some of the copper foil to reduce the
overall thickness of the laminate, and laminating a second and optionally
a third prepreg to the laminate. The resulting printed circuit board has
the flanges embedded in the surface of the laminate so that the inside
wall of the flange is electrically and mechanically attached to the
outside wall of the plated through hole barrel.