Abstract
Synchrotron radiation (SR) direct micromachining of polymers was developed and high-aspect-ratio microparts of polytetrafluoroethylene (PTFE) were made. The limitation of critical dependence on the photon flux was eliminated by processing PTFE at a temperature of 200–250°C, so that the process was greatly simplified and the aspect-ratios were improved with reducing the smallest surface detail to less than ten microns and achieving the largest structural height of one thousand microns. The decomposition mechanism was discussed with a comparison between the SR micromachining and laser ablation.