Surface Cleaning of Gold Structure by Annealing during Fabrication of Microelectromechanical System Devices
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概要
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We describe a technique for cleaning a gold surface using a dry process during the fabrication of microelectromechanical system (MEMS) devices. After exposure to oxygen plasma for ashing of the organic contaminants or etching of a sacrificial-layer film, the gold surface is oxidized. On such an oxidized surface, there are different incubation periods at different places, which give rise to nonuniform thickness in electroplating as well as in electrodeposition. A surface analysis by X-ray photoelectron spectroscopy (XPS) revealed that annealing at a temperature of over 260 °C causes oxygen to desorb from the gold oxide. The application of this cleaning technique before electroplating or electrodeposition leads to uniform growth.
- 2009-02-25
著者
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SAKATA Tomomi
NTT Microsystem Integration Laboratories
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ISHII Hiromu
NTT Microsystem Integration Laboratories
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OKABE Yuichi
NTT Microsystem Integration Labs.
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MACHIDA Katsuyuki
NTT Advanced Technology Corporation
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Shimoyama Nobuhiro
Ntt Microsystem Integration Laboratories
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Sato Norio
Ntt Microsystem Integration Lab. Kanagawa Jpn
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Kuwabara Kei
Ntt Microsystem Integration Laboratories Ntt Corporation
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Shimoyama Nobuhiro
NTT Microsystem Integration Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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Ono Kazuyoshi
NTT Microsystem Integration Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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Sato Norio
NTT Microsystem Integration Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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Okabe Yuichi
NTT Microsystem Integration Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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Machida Katsuyuki
NTT Advanced Technology Corp.
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Machida Katsuyuki
NTT Advanced Technology Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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