کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6613999 | 459620 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Adsorption behavior of triblock copolymer suppressors during the copper electrodeposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Suppressors play a significant role in microvia filling by copper electrodeposition to achieve electrical interconnection of the adjacent layers in printed circuit boards (PCBs). In this work, in order to investigate the adsorption behaviors of one type of triblock copolymer (with a structure of polyethylene oxide - polypropylene oxide - polyethylene oxide and a molecular weight of 2900, named as EPE2900) on the cathode during the copper electroplating process, electrochemical methods such as cyclic voltammetric stripping (CVS) was employed. The integrated value of the Cu stripping peak was marked as Q, the size of which can reflect the inhibiting strength of EPE2900 on the copper deposition. Then the dependence of Q/Q0 values on EPE2900 and Clâ concentrations was studied systematically by the CVS measurements. Here Q0 was the integrated value of the Cu stripping peak measured in the base electrolyte. The obtained results indicated that the inhibiting strength of EPE2900 monotonously increased with its concentrations. However, the inhibiting strength of EPE2900 only increased with Clâ concentration when EPE2900 concentration was higher than 20Â ppm. Importantly, the critical concentrations of Clâ and EPE2900 in the solution to form an intact barrier layer adsorbing onto the cathode surface were calculated. Based on the results of CVS measurements, a possible adsorption model of EPE2900 was proposed, which was able to reasonably elucidate the CVS measurements. In the meantime, Cu+-EPE2900-Clâ complexes were formed and very likely involved in the adsorption model, further evidenced by rotating ring-disk electrode (RRDE) techniques.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 116, 10 January 2014, Pages 284-291
Journal: Electrochimica Acta - Volume 116, 10 January 2014, Pages 284-291
نویسندگان
Ning Xiao, Deyu Li, Guofeng Cui, Ning Li, Qing Li, Gang Wu,