Abstract
The residual or doped element concentration [E] in GaAs measured by SSMS is only accurate with respect to the relative sensitivity coefficient RSCE. For a trace element concentration, the RSCE = [E]SSMS/[E]TRUE is set to unity, if no reference material or method is available to approximate the concentration to the true value. For boron a relative sensitivity coefficient of RSCB = 0.94 ± 0.08 was obtained using TI-IDMS as a reference method. RSCN = 1 is used for nitrogen determinations. A boron and nitrogen detection limit of 4.4 × 1013 cm–3 is achieved. SSMS was used as reference method to calibrate the FTIR factor fE = [E] / Iα due to the integrated local vibrational mode absorption Iα of atomic boron and nitrogen in GaAs. A factor of fB = (12.0 × 2.7) × 1016 cm–1 (517 cm–1) and fN = (7.4 ± 0.1) × 1015 cm–1 (472 cm–1) was obtained for a boron and nine nitrogen containing GaAs samples at 77 K and 10 K, respectively.
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Received: 15 December 1998 / Revised: 8 April 1999 / Accepted: 13 April 1999
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Wiedemann, B., Rädlinger, G., Alt, H. et al. Spark source mass spectrometric assessment of boron and nitrogen concentrations in crystalline gallium arsenide. Fresenius J Anal Chem 364, 772–776 (1999). https://doi.org/10.1007/s002160051431
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DOI: https://doi.org/10.1007/s002160051431