Removal of oxygen atoms from a SiO2 surface by incoherent vacuum ultraviolet excimer irradiation |
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Authors: | T Ohtsubo T Azuma M Takaura T Higashiguchi S Kubodera W Sasaki |
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Institution: | (1) Department of Electrical and Electronic Engineering and Photon Science Center, Miyazaki University, Gakuen Kibanadai Nishi 1-1, Miyazaki, 889-2192 Japan, JP |
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Abstract: | We have demonstrated the non-thermal removal of oxygen atoms from an oxidized silicon surface (SiO2) on a silicon wafer by the use of a low-power (0.3 mW cm-2) incoherent vacuum ultraviolet (VUV) light source at 126 nm. X-ray photoelectron spectroscopy (XPS) has shown that a maximum
Si concentration of 80% appears at the surface after a 20-h irradiation with 9.8 eV photons, as a result of oxygen removal
from the SiO2 matrix. The surface morphology, however, indicates no damage or melting on the surface even after the irradiation.
Received: 15 April 2002 / Accepted: 17 April 2002 / Published online: 10 September 2002
RID="*"
ID="*"Permanent address: Nano-Tech Photon Inc., Shimotomita 4132-1, Shintomi, Miyazaki, 889-1404, Japan
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ID="**"Corresponding author. Fax: +81-985/583-899, E-mail: kubodera@opt.miyazaki-u.jp |
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Keywords: | PACS: 42 72 Bj 68 47 Gh 82 50 Hp |
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