Decoration of buried surfaces in Si detected by positron annihilation spectroscopy

The terminations of buried surfaces of two different cavity types (nano- and microcavities) produced in the same He + - H + co-implanted p -type Si (100) sample annealed at 900 ° C , are studied and characterized by positron annihilation spectroscopy. The characterization was carried out by means of...

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Bibliographic Details
Published in:Applied physics letters 2006-01, Vol.88 (1), p.011920-011920-3
Main Authors: Brusa, R. S., Macchi, C., Mariazzi, S., Karwasz, G. P., Egger, W., Sperr, P., Kögel, G.
Format: Article
Language:English
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Summary:The terminations of buried surfaces of two different cavity types (nano- and microcavities) produced in the same He + - H + co-implanted p -type Si (100) sample annealed at 900 ° C , are studied and characterized by positron annihilation spectroscopy. The characterization was carried out by means of three complementary positron techniques: Doppler broadening and coincidence-Doppler broadening spectroscopy with a continuous slow positron beam, and lifetime spectroscopy with a pulsed slow positron beam. It was found that the nanocavities have a pristine surface of Si, while the surfaces of the microcavities, formed below protruding blisters, are oxygen decorated. This case study opens the interesting use of the positron spectroscopy tool in the topical subject of empty space for microelectronics applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2162691