Local Oxidation Induced by Inhomogeneous Stress on Blistered Si Surface
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概要
- 論文の詳細を見る
By utilizing surface stress to modify surface reaction potential and increase surface reactivity, a technique for the two-dimensional patterning of surface chemical reactions may be realized by surface stress modulation. Blister is local protrusion on a solid surface induced by gas ion irradiation, and is considered to create local stress on surface layers. Si(100) substrate was irradiated with H+ (incident energy: 10 keV, fluence: $1 \times 10^{22}$ m-2) at an angle of 30° to the surface normal. Blisters of 1–5 μm in diameter at the base were formed. After the ion irradiation, the substrate was oxidized. Scanning Auger electron microscopy revealed that, compared with the flat surface, the perimeters of the blisters had a higher oxygen intensity whereas the blister tops had a lower oxygen intensity. The stress distribution of the blister was calculated using the finite element method. It was found that the surface layers were stretched laterally at the blisters tops and compressed at the perimeters, relative to the flat surface. There was a clear correspondence between the O distribution and the stress distribution on the surface. Our results indicate that the patterned oxidation of the Si surface can be governed by the application of surface stress.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-05-15
著者
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YAMAMOTO Hiroyuki
Japan Atomic Energy Agency
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HOJOU Kiichi
Japan Atomic Energy Agency
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ITAKURA Akiko
National Institute for Materials Science (NIMS)
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Igarashi Shinichi
National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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Muto Shunsuke
Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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Itakura Akiko
National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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Kitajima Masahiro
National Defense Academy of Japan, Yokosuka, Kanagawa 239-8686, Japan
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Nakano Shinsuke
Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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Tanabe Tetsuo
Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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Yamamoto Hiroyuki
Japan Atomic Energy Agency, 2-4 Shirakatashirane, Tokai, Ibaraki 319-1195, Japan
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