Nahinfrarot-Laser-Strukturierung und nasschemische Metallisierung von Aluminiumoxid mittels Laser-Absorptionsschicht

Description

This work develops an innovative manufacturing process for the laser structuring of aluminum oxide ceramics, expanding the capabilities of LDS technology to ceramic materials. This advancement is driven by the increasing demand for robust electronic components in high-temperature and high-performance applications, where conventional thermoplastic materials reach their limits. The process uses a temporary laser absorption layer that enhances the absorption of the near-infrared laser at 1,064 nm, enabling efficient structuring of aluminum oxide at lower laser energy. The experiments demonstrate that the chalk spray, in particular, delivers outstanding results as a laser absorption layer by enabling stable and reproducible metallization with a high adhesion strength of over 10 N/mm². By precisely adjusting the laser parameters and analyzing the activated surfaces, it is shown that lattice distortions in aluminum oxide trigger catalytic activity in the chemical copper bath. This positive outcome not only confirms the research hypothesis but also highlights the potential of this method for the production of precise ceramic 3D electronics. The process is successfully applied to bonding tests and the creation of antenna layouts, illustrating the broad application range of the method.