Reactive magnetron sputtering of CNx thin films at different substrate bias

被引：49

作者：

Zheng, WT ^{[1
]}

Broitman, E ^{[1
]}

Hellgren, N ^{[1
]}

Xing, KZ ^{[1
]}

Ivanov, I ^{[1
]}

Sjostrom, H ^{[1
]}

Hultman, L ^{[1
]}

Sundgren, JE ^{[1
]}

机构：

[1] Linkoping Univ, Dept Phys, S-58183 Linkoping, Sweden

来源：

THIN SOLID FILMS | 1997年 / 308卷

关键词：

CNx films; magnetron sputtering;

D O I：

10.1016/S0040-6090(97)00407-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The chemical binding states of C and N atoms, and optical properties of carbon nitride (CNx) thin films deposited by unbalanced magnetron sputtering, have been investigated as a function of the negative substrate bias (V-s). The film deposition rate increased slightly with increasing V-s, having a weak maximum at floating potential (similar to 50 V), and decreased sharply to zero for V-s > 150 V-s while N/C ratios did not exhibit any significant variation. Raman spectroscopy was used to reveal that the structure of the film is predominantly amorphous. Fourier transform infra-red spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS) analyses showed that N atoms in the films were bound to C atoms through sp(2) and sp(3) configurations. Triple C-N bonds were also detected by FTIR. The ratio of sp(3) to sp(2) bonds increased with increasing V-s. The maximum sp(3) concentration in CNx films was estimated to be similar to 20%. The optical band gap of CNx films was also found to increase with an increase in V-s. (C) 1997 Elsevier Science S.A.

引用

页码：223 / 227

页数：5

共 19 条

[1] CHEMICAL-STRUCTURE AND PHYSICAL-PROPERTIES OF DIAMOND-LIKE AMORPHOUS-CARBON FILMS PREPARED BY MAGNETRON SPUTTERING [J].