Handle with Care

摘要

When working with diazo and other phototools, film handling and first-quality finished boards go hand in hand. If your technicians are working with a phototool that has been damaged, you can expect the PCB will require a generous amount of touch-up. Worst case, you may have to scrap it altogether. With finer lines and spaces, smarter film handling and cleaner production areas are more necessary than ever. Remember, anything that unintentionally blocks light will cause a defect on the board. Deep scratches on a phototool prevent light from transmitting properly to the dry film resist or LPI ink on the board. The result is a defect.