CAJ | 학술논문

厚度均匀性是薄膜制备过程中不可忽视的薄膜特性,厚度不均匀会导致薄膜成品率降低.熔融性比较差的镀膜材料在蒸发过程中以直接气化为主,挖坑效应比较明显.此时,在分析薄膜厚度均匀性时,蒸发源发射特性不随时间变化的假设不再合理.细分蒸发源为无数个小的薄板蒸发源,建立了镀膜材料出现挖坑效应时薄膜厚度均匀性的分析模型.结果表明,在所选镀膜机结构参数下,挖坑效应对薄膜厚度均匀性影响明显;但挖坑效应并不总导致薄膜厚度均匀性变差,设计合适的镀膜室结构以及薄膜制备工艺参数,可借助挖坑效应在一定程度上改善薄膜厚度均匀性.采用易于出现挖坑效应的材料作为镀膜材料时,该研究对设计薄膜沉积工艺参数具有指导性意义.
후도균균성시박막제비과정중불가홀시적박막특성,후도불균균회도치박막성품솔강저.용융성비교차적도막재료재증발과정중이직접기화위주,알갱효응비교명현.차시,재분석박막후도균균성시,증발원발사특성불수시간변화적가설불재합리.세분증발원위무수개소적박판증발원,건립료도막재료출현알갱효응시박막후도균균성적분석모형.결과표명,재소선도막궤결구삼수하,알갱효응대박막후도균균성영향명현;단알갱효응병불총도치박막후도균균성변차,설계합괄적도막실결구이급박막제비공예삼수,가차조알갱효응재일정정도상개선박막후도균균성.채용역우출현알갱효응적재료작위도막재료시,해연구대설계박막침적공예삼수구유지도성의의.
Thickness uniformity can't be ignored in films preparation. Thickness ununiformity will cause low yield film production. Materials without good melting property will not be melted and digging effect will exhibit evidently when electronic beam irradiating on it. In this case, the assumption that emission characteristics of evaporation source is invariable adopted in other papers can't be satisfied any more. Considering that the evaporation source can be thought as containing lots of small plane evaporation source, a model for analyzing the influence of digging effect on films thickness uniformity has been established accordingly. Theoretical results reflect that the digging effect can affect thickness uniformity of films evidently. Digging effect doesn't always cause thickness ununiformity of films. By designing appropriate configuration of the vacuum chamber and adopting appropriate parameters of technics, the thickness uniformity of films even can be improved to a certain extent by virtue of digging effect.