COMPENSATION METHOD FOR PCB EXPANSION AND CONTRACTION

摘要

A compensation method for PCB expansion and contraction, comprising the following steps: a PCB (100) is divided into a plurality of areas; at least two reference targets (110) are arranged on each area; after the PCB (100) has been pressed, the actual positions of the reference targets (110) on each area are measured and compared with theoretical positions, and an expansion and contraction value of each area is converted. The expansion and contraction of a PCB is inconsistent at different positions. Partition area measurement significantly reduces expansion and contraction deviation of the PCB, and partition area compensation is performed on subsequent processes via the obtained expansion and contraction value of each area, thereby reducing production errors in the subsequent processes, and increasing the manufacturing precision of the PCB.