An overview of microvia technology

摘要

There are many advantages of microvia: it requires a much smaller pad, which saves the board size an weight; with microvia, more chips can be placed in less space or a smaller PCB, which results in a low cost; An with microvia, electrical Performance improves due to a Shorter pathway. Basically, there Are five major processes for Microvia formation: NC drilling; Laser via fabrication including CO_2 Laser, YAG laser, and excimer; Photo-defined vias, wet or dry; Etch via fabrications including Chemical (Wet) etching; and Conductive ink formed vias, wet or Dry.