射频、甚高频驱动的双频溅射等离子体性能研究
[Abstract]:In order to fabricate multicomponent thin films by magnetron sputtering and effectively control the composition of films, dual-frequency dual-target magnetron sputtering technology driven by combination of low frequency and high frequency, radio frequency and very high frequency is one of the possible ways. However, at present, dual-target magnetron sputtering mainly uses DC and RF driven dual-target, pulse DC and RF driven dual-target co-sputtering technology, and lack of high-frequency combination dual-frequency magnetron sputtering technology. In order to develop a dual-frequency magnetron sputtering system driven by a combination of low frequency and high frequency and a combination of radio frequency and very high frequency, a dual-frequency magnetron sputtering system was developed by combining the power sources of 2MHz 13.56MHz 27.12 MHz and 60 MHz. The rejection field energy analysis technique and the Langmuir probe technique were used. The plasma characteristics of dual frequency magnetron sputtering and ICP enhanced double frequency magnetron sputtering are studied. The ion energy distribution characteristics of 2MHz/13.56 (27.12 ~ 60) MHz / 13.56 MHz / 27.12 (60) MHz and 27.12MHz/60MHz dual-frequency magnetron sputtering discharge plasma have been studied. It is found that the distribution of ion energy depends on the power ratio and driving frequency of low frequency and high frequency. For the dual-frequency magnetron sputtering of 2MHz/13.56 (27.12 ~ (60) MHz), increasing the low frequency / high frequency power ratio can lead to the change of ion energy distribution from single mode structure to double mode structure. For the dual-frequency magnetron sputtering of 13.56MHz/27.12 _ (60) MHz and 27.12MHz/60MHz, the increase of low frequency / high frequency power ratio leads to the increase of peak energy. The influence of low frequency and high frequency power ratio on sheath oscillation is used to explain the variation of ion energy distribution in dual frequency magnetron sputtering. The plasma density, electron temperature, plasma potential and electron energy distribution of 13.56MHz/27.12 _ (60) MHz and 27.12MHz/60MHz dual-frequency magnetron sputtering discharge plasma are studied in this paper. It is found that different frequency combinations can cause these differences. Therefore, the plasma performance of dual-frequency magnetron sputtering can be controlled by choosing the appropriate frequency combination. The plasma characteristics of ICP enhanced 13.56MHz/27.12 (60) MHz and 27.12MHz/60MHz double frequency magnetron sputtering discharge are further investigated. It is found that the enhancement of ICP discharge is related to the sputtering frequency combination, and it is necessary to select a suitable frequency combination to improve the plasma performance. Therefore, the development of dual-frequency magnetron sputtering technology driven by combination of low frequency and high frequency, radio frequency and very high frequency provides a new means for controlling the deposition and structure properties of thin films.
【学位授予单位】:苏州大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TB383.2
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