The final product showed that the experiment results from drilling and plasma desmear through-hole in rigid-flex zone greatly improved the reliability of metallized through-holes .
最终产品显示，金属切削刚挠结合区通孔，等离子清洗通孔等实验的结果大大地提高金属化孔的可靠性。
A new process of rigid-flex PCB desmear process was found by combining ultrasonic cleaning with alkaline potassium permanganate , which is commonly used in rigid PCB production .
