Internal-getter formation in nitrogen-doped dislocation-free silicon wafers

Internal-getter formation in nitrogen-doped dislocation-free silicon wafers An experimental study is reported concerning the formation of defects in nitrogen-doped dislocation-free silicon wafers under a multistage heat treatment to produce an internal getter, the first stage being rapid thermal annealing (RTA) under different conditions. The experiments are conducted on p-Si(100) wafers of diameter 200 mm with an oxygen content of (6−7) × 1017 cm−3 and a doping level of 1.6 × 1014 cm−3, the resistivity being 10–12 ω cm. The processed wafers are examined by optical microscopy and transmission electron microscopy. With normal conditions of RTA (argon, 1250°C, 20 s), the process is found to be incapable of creating a defect-free subsurface layer of adequate thickness, though it is able to provide the desired system of defects in the bulk. The aim is achieved by changing to sequential RTA in oxygen and argon as the first stage. The reasons for the results are presented. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Microelectronics Springer Journals

Internal-getter formation in nitrogen-doped dislocation-free silicon wafers

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2011 by Pleiades Publishing, Ltd.
Subject
Engineering; Electrical Engineering
ISSN
1063-7397
eISSN
1608-3415
D.O.I.
10.1134/S1063739711080166
Publisher site
See Article on Publisher Site

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