METHOD FOR REJECTION MARKING AND MAINTENANCE FOR PRINTED CIRCUIT BOARD

摘要

PURPOSE: A printed circuit board defective marking and managing method are provided to distinguish fault of a small unit less than 3.5 mm x 3.5 mm by grouping a plurality of units as one semi block and marking whether fault exists or not. CONSTITUTION: A strip is composed of a plurality of blocks(100). The strip is inputted to a printed circuit board processing line. The block is composed of a plurality of units(10). A semi block is formed by grouping adjacent units as m x n arrangement. The fault generation of the semi block is marked in a set location within the block when fault is generated in an individual unit comprising the semi block. The block or unit in which a fault mark is stamped is eliminated.