Poly－3BCMU薄膜光漂白的实验研究

Experimental Investigstion of Photo-Induced Bleaching Process in Poly-3BCMU Films

报道了Ｐｏｌｙ－３ＢＣＭＵ薄膜光漂白过程的实验研究结果。测量了薄膜光漂白前后的可见及紫外光谱的变化，表明在光漂白过程中聚合物的长链被逐渐打断。实验表明，被漂白的聚合物薄膜可以被某些有机溶剂溶解，导致所谓的显影过程。实验研究了氧对光漂白过程的影响，并发现在Ｐｏｌｙ－３ＢＣＭＵ薄膜表面涂复光刻胶薄层可阻止氧分子向薄膜内的扩散，从而大大减缓光漂白过程。本文同时对光漂白在制备光波导元件中的应用进行了研究。

Photo-induced bleaching of poly-3BCMU film has been studied experimentally. The UV and visible spectra of poly-3BCMU film have been measured before and after bleaching, showing the evidence of the breakage of the polymer backbones. The possibility of developing bleached films has been demonstrated. The importance of oxygen for photo-induced bleaching has been investigated. It has been shown that a photoresist superlayer on poly-3BCMU film prevents oxygen from sufficiently diffusing into the film during bleaching process and hence greatly slows down the process. The potential applications of bleaching process has been discussed as well.