Drilling - CO2 Laser Drilling Machine
drilling with conformal mask is a well-tested way to handle the
microvia projects among PCB manufacturers. Yet, the additional photoimaging
process for via pattern etching has a slight registration problem,
which comes as a direct result of etching capability constraint.
Therefore, drilling of copper layer by direct laser irradiation
is a promising alternative. This technology is only properly employed
when special surface pre-treatment is done to improve the surface
topography of the copper layer, as well as to enhance the laser
absorptivity on copper.
fact, the copper direct laser drilling is capable of providing higher
accuracy, better hole quality and better efficiency for HDI projects.
The smallest hole size of it can go down to 2 mil.
Picture of CO2 Laser Drilling Machine