The spin - coated films are single - phase and highly oriented with the c - axis perpendicular to the quartz substrates . this type of materials has good thermal stability , and their decomposition points are near 300 c 旋涂法沉積的該類材料的薄膜具有較好的單相結(jié)構(gòu),材料成膜后,其單相晶體的c軸很好地垂直于石英基片表面。