Drilled hole quality in laser machining of AFRP for printed wiring board (temperature of hole wall and thermal damage in drilling)

摘要

This paper describes the relation between the temperature and the damage at the hole wall of AFRP for printed wiring board in laser drilling. First the temperature is measured by a thermocouple at various positions on the drilled hole wall in laser drilling. Secondly; the width of damage is observed by an optical microscope. The temperature at thermal damage is clarified by comparing these results. Finally the thermal transfer model paying attention to the thermal properties of aramid fiber is proposed for the laser drilling. It is shown that this 2D analysis agree with experiment well from these experimental and calculated results.