Mr. Xiaofeng Zhang Profile

Xiaofeng Zhang

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Proceedings Article | 18 February 2011 Paper

Silicon nitride thin films deposited by DC pulse reactive magnetron sputtering

Xiao-Feng Zhang, Pei-Gang Wen, Yue Yan

Proceedings Volume 7995, 79951M (2011) https://doi.org/10.1117/12.888164

KEYWORDS: Sputter deposition, Silicon, Refractive index, Thin films, Silicon films, Thin film deposition, Photoemission spectroscopy, Chemical vapor deposition, Ions, Spectroscopy

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Silicon nitride (SiNx) thin films were deposited by DC pulse reactive magnetron sputtering at ambient temperature. These films were characterized by spectroscopic ellipsometry(SE), X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). It is found that among several regulable parameters, pulse frequency, target power density, reactive gas flow rate (or working pressure) could significantly influence the optical properties and compositions of SiNx thin film more than the reverse time. The rotation of substrate which used to improve the uniformity in the radial direction also can be utilized to alter the in-depth composition distribution of the films. SiNx film with high refractive index (~2.00) and ultra low extinction coefficient (<10^-3) were obtained on the optimal deposition conditions. It could be concluded that, compared to many disadvantages existing in various chemical vapour deposition (CVD) or radio frequency (RF) magnetron sputtering, DC pulse reactive magnetron sputtering is an alternative method to produce SiN_xfilms for the increasing application especially as the moisture barriers for flexible electronics and optoelectronics.

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