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The perfect crystalline quality of PS films is verified by X-ray diffraction (XRD) and Raman spectroscopy.
x光衍射分析表明样品具有良好的晶体质量；
The superlattice structure will become new dislocation source and decrease crystalline quality if the superlattice structure is not flat, which is caused by other factors.
如果样品中由于其他因素造成超晶格层起伏较大，那么超晶格层不仅起不到过滤缺陷的作用还会成为新的缺陷源，降低外延层质量。
Meanwhile, fine crystal discharge device was added in crystallizer to decline quantity of crystal nucleus and to increase crystal growth rate so as to reach the aim of improving crystalline quality.
同时在结晶器中增加细晶排出装置，降低晶核数量，提高晶体生长速率，达到改善结晶质量的目的。
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