SHORT CIRCUIT REPAIRING METHOD FOR PLASMA DISPLAY BOARD, AND ITS DEVICE

摘要

PROBLEM TO BE SOLVED: To efficiently remove generated crushed pieces by sucking the vicinity of a short-circuited portion by a short circuit repairing method for cutting the short-circuited portion on a board with the energy via direct radiation of a laser beam. SOLUTION: Abnormal discharge on electrodes and luminance reduction and abnormal luminescence on barrier ribs occur due to a short circuit portion 1 generated on silver electrodes or glass barrier ribs as a defective portion and a protruded portion generated by foreign matters or a pattern form collapse on a stripe-like pattern of a board 2. When the short-circuited portion 1 is cut by radiation of a laser beam 4 from a laser gun 3 above, the vicinity is sucked by a suction device 5 installed above at a position other than this passing path preferably for 1 sec or longer. The power of the laser beam 4 is preferably changed according to the melting point of the constituting material of the short- circuited portion 1. Crushed pieces are not scattered from the short-circuited portion 1 radiated by the laser beam 4, the pollution to the surrounding is prevented, and the number of times of radiation of the laser beam 4 to newly generated defects is reduced.