Patent ID: 7143492
Filing Date: 2006-12-05
Classification: H05K,Y10T

Abstract:
1. A method of repairing a printed circuit board comprising the steps of: inspecting like model printed circuit boards to determine which have circuit trace faults; plotting an area block plan of the like printed circuit boards based on a layout thereof, said area block plan including a plurality of area blocks; sorting said like printed circuit boards by defective area blocks into two major repair categories of for repair and providing for repair; utilizing a CNC bench mill to remove a defective area block of a printed circuit board designated as for repair in the printed circuit board sorting step,thereby leaving a corresponding empty area block; milling a stepped bonding section along interior edges of said empty area block; placing a reverse surface of a printed circuit board designated as providing for repair in the printed circuit board sorting step on the CNC bench mill; cutting a like area block to that removed in the area block removal step from the printed circuit board designated as providing for repair to extract the like area block therefrom along plotted edges; milling a stepped bonding section along outer edges of said like area block; applying liquid adhesive to the stepped bonding sections of said empty area block in said printed circuit board being repaired; placing said area block of said printed circuit board providing for the repair therein; using an optical positioning instrument to adjust placement of said area block placed in the adhesive applying step ensuring said area block is accurately seated at in the empty area block; applying a plastic band over a seam rift between an outer periphery of said placed area block and said printed circuit board being repaired; rolling a rubber roller over an upper surface of said plastic band thereby evenly and tightly embedding said area block in said printed circuit board placing said printed circuit board into an oven and heating until said applied liquid adhesive cures and said area block is firmly cemented in said printed circuit board being repaired; and removing said plastic band from said printed circuit board being repaired whereby said area block of said printed circuit board providing for repair is fully integrated in said printed circuit board being repaired into a single structural entity.