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Effect of processing parameters on electroless Cu seed layer properties

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Effect of processing parameters on electroless Cu seed layer properties

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Title: Effect of processing parameters on electroless Cu seed layer properties
Author: Ee, Elden Yong Chiang; Chen, Z.; Chan, L.; See, Alex K. H.; Law, S. B.; Tee, K. C.; Zeng, K. Y.; Shen, L.
Copyright year: 2004
Abstract: Electroless Cu seed layer is essential for subsequent copper metallization by electroplating for sub-micron wafer technology. This layer is required to provide good step coverage and high uniformity. In the current work, electroless copper was deposited on a TiN surface activated by palladium. The effect of deposition time on the properties of electroless Cu films was reported. It shows that as the deposition time increases, the surface coverage of Cu film on activated TiN is improved and there is a significant reduction in sheet resistance and an increase in grain size of deposited copper film. Of particular interest is that there exists a preferred Cu (111) crystal orientation in the samples subjected to more than as short as 3 min of deposition. A surface roughness (Rrms) of ∼17 nm has been achieved. The results obtained in current study points out a promising process for laying down thin Cu seed layer.
Subject: DRNTU::Engineering::Materials::Microelectronics and semiconductor materials::Thin films
Type: Journal Article
Series/ Journal Title: Thin solid films
School: School of Materials Science and Engineering
Rights: © 2004 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Thin Solid Films, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.tsf.2004.05.018].
Version: Accepted version

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