This thesis proposes a scan reordering method based on low-power fill on stuck-at fault pattern to improve the bridge fault coverage. In order to overcome the drawback of low-power fill on bridge fault coverage, we first extract bridge faults from physical layout and calculate the impact of each PPI pair on bridge-fault activation to measure the correlation between two PPI pair. Next, scan partition and scan reorder are performed to generate scan order that minimizes the correlation hold by scan cells in each scan chain. Experiment shows our proposed method generates better bridge fault coverage comparing to random scan order and the wire length overhead is also provided. Finally, some future possible improvement is presented.