| Popis: |
Ceramic and crystalline wafer substrates are widely used in microelectronics. The individual choice is based on their thermal, optical and mechanical properties. For a variety of applications high quality laser micro processing of these materials, i.e. the generation of blind and through holes, grooves and even complex three dimensional micro structures, is gaining in importance. The department of applied laser technologies of the LMTB GmbH has conducted extensive studies on the versatility of q-switch Nd:YAG laser systems for the micro structuring of ceramic and crystalline wafer substrates that differ strongly in their optical and mechanical properties, such as Al 2 O 3 , AlN, sapphire, Si and SiC. This paper discusses the laser material micro machining results in respect to the laser parameters used to optimize the micro processing quality and speed for the different materials. |
