Various factors affecting precision of trim and resistor stability are considered. The influence of machine operating
parameters (beam power, pulse frequency and trim speed) on resistor performance are examined and quantified
through statistically designed experiments for a Q-switched YAG laser system. Laser kerf quality is examined by
scanning electron microscopy and related to kerf isolation resistance measurements. A relatively simple, production
oriented, quality control test is proposed for rapid determination of kerf electrical stability. In addition, the effect
of cut design and extent of trim on precision and stability are discussed.
