Exploring the Impact of Laser Drilling on Material Thermal Decomposition: A Computational Study Using KratosMultiphysics

Laser drilling has gained widespread popularity in industrial applications due to its precision, non-contact nature, speed, efficiency, and energy-saving attributes. This technology plays a vital role in the manufacturing of printed circuit boards (PCBs) and semiconductors. Additionally, femtosecond laser drilling has enhanced the capabilities of micro- and nano-fabrication of materials. The reliability of PCBs is heavily influenced by the laser drilling process. During laser drilling, numerous physical and chemical changes occur within a short timeframe, and the complexity of these changes remains a subject of ongoing investigation. Given the challenges of observing such rapid material transformations through experiments, simulation, and computational analysis offer a cost-effective alternative. KratosMultiphysics is a multi-physics solver employed to address a variety of process simulations across different fields. This paper initially gathered material parameters and recorded various test results under different laser drilling conditions for comparison with simulation outcomes. Utilizing KratosMultiphysics as a computational tool, we simulate the ablation of material with the subsequent heat conduction and decomposition of the polymer material according to a new numerical model.