Impedance Control of Reactive Sputtering Process in Mid-Frequency Mode with Dual Cathodes to Deposit Al-Doped ZnO Films

Al-doped zinc oxide (AZO) films were deposited on glass substrates at 300 C by reactive mid-frequency (mf, 50 kHz) magnetron sputtering using dual magnetron cathodes with Al-Zn alloy targets. In order to keep the very high deposition rate stable in the transition region of the reactive sputtering sy...

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Published in:Japanese Journal of Applied Physics 2003-01, Vol.42 (Part 1, No. 1), p.263-269
Main Authors: Kon, Masato, Song, Pung Keun, Shigesato, Yuzo, Frach, Peter, Ohno, Shingo, Suzuki, Koichi
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container_end_page 269
container_issue Part 1, No. 1
container_start_page 263
container_title Japanese Journal of Applied Physics
container_volume 42
creator Kon, Masato
Song, Pung Keun
Shigesato, Yuzo
Frach, Peter
Ohno, Shingo
Suzuki, Koichi
description Al-doped zinc oxide (AZO) films were deposited on glass substrates at 300 C by reactive mid-frequency (mf, 50 kHz) magnetron sputtering using dual magnetron cathodes with Al-Zn alloy targets. In order to keep the very high deposition rate stable in the transition region of the reactive sputtering system, the reactive gas (O2) flow was controlled using the "discharge impedance feedback system", where the discharge current value was used to control the O2 flow. The highest deposition rate for the transparent conductive AZO films achieved by this dual magnetron sputtering (DMS) system was 242 nm/min, which was higher by one order of magnitude than that achieved by the conventional reactive sputtering system. The lowest resistivity of the AZO film obtained by such a high deposition rate was 4.4x10-4 OHM cm. The structure and electrical properties of the films varied systematically by controlling the discharge current in the transition region using this system. 26 refs.
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title Impedance Control of Reactive Sputtering Process in Mid-Frequency Mode with Dual Cathodes to Deposit Al-Doped ZnO Films
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