Short time deposition kinetics of diethyl phthalate and dibutyl phthalate on a silicon wafer surface

Yuhao Kang, Walter Den, Hsun-Ling Bai*

*此作品的通信作者

研究成果: Article同行評審

21 引文 斯高帕斯(Scopus)

摘要

Short time adsorption and desorption behaviors of two alkyl phthalate esters, namely diethyl phthalate (DEP) and dibutyl phthalate (DBF), on silicon wafers exposed under various ambient concentrations were experimentally and theoretically investigated. The results showed that the surface density of DBF was significantly affected by both the length of exposure time and its ambient concentration, whereas that of DEP was only affected by its ambient concentration within the tested periods between 60 and 240 min. The determination of rate parameters for adsorption and desorption showed that the rate constants of DEP were always larger than those of DBF. Also, the sticking coefficient of DEP was larger during the initial adsorption stage due to its relatively lower molecular weight as compared to DBF. The value of the sticking coefficient for DEP, however, decreased much faster such that the value eventually became smaller than that for DBF. Therefore, for silicon wafers experiencing a short exposure time, organic compounds with lower molecular weights may be a more important source of airborne molecular contamination than those with higher molecular weights.

原文English
頁(從 - 到)1331-1336
頁數6
期刊Industrial and Engineering Chemistry Research
45
發行號4
DOIs
出版狀態Published - 15 2月 2006

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