结合制作光子晶体结构的具体要求,研究了电子束曝光得到的电子束胶上(GaAs衬底)随实验条件变化的图形。结果表明,胶的厚度、曝光剂量、显影/定影时间等参数对图形的质量有重要影响.通过合理优化这些参数,我们得到了高质量的掩膜图形.
The influence of different fabrication parameters on polymethyl methacrylate (PMMA) etching mask for twodimensional photonic crystal structures are studied. The results show that high quality PMMA etching mask can be realized by optimizing parameters such as PMMA thickness,electron beam exposure dose, developing time,and fixation time.