Diagnostics of impurity composition of high-purity monosilane by results of the analysis of a test silicon single crystal
Elements the 3 and 5 of groups of the Periodic System and carbon are the most important impurities in silicon. The estimation technique of carbon, boron and phosphorus impurity content in high-purity monosilane has been proposed. The technique involves the preparation of polycrystalline silicon by s...
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| Format: | Article |
| Language: | English |
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Pensoft Publishers
2016-12-01
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| Series: | Modern Electronic Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2452177916300822 |
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| author | Vladimir A. Gavva Anatolii V. Gusev Tatiana V. Kotereva |
| author_facet | Vladimir A. Gavva Anatolii V. Gusev Tatiana V. Kotereva |
| author_sort | Vladimir A. Gavva |
| collection | DOAJ |
| description | Elements the 3 and 5 of groups of the Periodic System and carbon are the most important impurities in silicon. The estimation technique of carbon, boron and phosphorus impurity content in high-purity monosilane has been proposed. The technique involves the preparation of polycrystalline silicon by silane decomposition, growing a test single crystal by the floating zone melting method and analysis of single crystal samples by IR spectroscopy. Calculation of impurity concentration in polycrystalline silicon has been performed using results on their content in the test single crystal samples, data on impurity distribution in the liquid-solid system and sample coordinates along the ingot length. Effective impurity distribution coefficients in the solid-liquid system for specific growing conditions have been calculated using the Burton-Prim-Slichter equation. Results for the test silicon samples with natural isotopic composition and 28Si isotope enriched ones obtained from monosilane samples with different impurity contents have been reported. Results on IR spectroscopic studies of impurity composition for the test silicon single crystal are in agreement with the concentration data obtained by chromatography. The concentration of 3 and 5 group impurities in monosilane were in the range 4x10−9−2x10−6 at. %, and for carbon concentration was 2x10−6–6x10−4 at.%. The measurement uncertainty by IR spectroscopy does not exceed 15% for carbon impurity and 20% for boron and phosphorus. We show that the upper limit of carbon content in monosilane detected using this method is determined by its solubility in silicon, while the bottom limit depends on the detection accuracy of the IR spectroscopy technique and possible background contamination. |
| first_indexed | 2024-03-12T04:27:05Z |
| format | Article |
| id | doaj.art-a68921dc03ad4c05b31d8d0d05f3c21e |
| institution | Directory Open Access Journal |
| issn | 2452-1779 |
| language | English |
| last_indexed | 2024-03-12T04:27:05Z |
| publishDate | 2016-12-01 |
| publisher | Pensoft Publishers |
| record_format | Article |
| series | Modern Electronic Materials |
| spelling | doaj.art-a68921dc03ad4c05b31d8d0d05f3c21e2023-09-03T10:19:02ZengPensoft PublishersModern Electronic Materials2452-17792016-12-012411211510.1016/j.moem.2016.11.002Diagnostics of impurity composition of high-purity monosilane by results of the analysis of a test silicon single crystalVladimir A. Gavva0Anatolii V. Gusev1Tatiana V. Kotereva2Devyatykh Institute of Chemistry of High Purity Substances, Russian Academy of Sciences, 49 Tropinina Str., Nizhny Novgorod 603950, RussiaDevyatykh Institute of Chemistry of High Purity Substances, Russian Academy of Sciences, 49 Tropinina Str., Nizhny Novgorod 603950, RussiaDevyatykh Institute of Chemistry of High Purity Substances, Russian Academy of Sciences, 49 Tropinina Str., Nizhny Novgorod 603950, RussiaElements the 3 and 5 of groups of the Periodic System and carbon are the most important impurities in silicon. The estimation technique of carbon, boron and phosphorus impurity content in high-purity monosilane has been proposed. The technique involves the preparation of polycrystalline silicon by silane decomposition, growing a test single crystal by the floating zone melting method and analysis of single crystal samples by IR spectroscopy. Calculation of impurity concentration in polycrystalline silicon has been performed using results on their content in the test single crystal samples, data on impurity distribution in the liquid-solid system and sample coordinates along the ingot length. Effective impurity distribution coefficients in the solid-liquid system for specific growing conditions have been calculated using the Burton-Prim-Slichter equation. Results for the test silicon samples with natural isotopic composition and 28Si isotope enriched ones obtained from monosilane samples with different impurity contents have been reported. Results on IR spectroscopic studies of impurity composition for the test silicon single crystal are in agreement with the concentration data obtained by chromatography. The concentration of 3 and 5 group impurities in monosilane were in the range 4x10−9−2x10−6 at. %, and for carbon concentration was 2x10−6–6x10−4 at.%. The measurement uncertainty by IR spectroscopy does not exceed 15% for carbon impurity and 20% for boron and phosphorus. We show that the upper limit of carbon content in monosilane detected using this method is determined by its solubility in silicon, while the bottom limit depends on the detection accuracy of the IR spectroscopy technique and possible background contamination.http://www.sciencedirect.com/science/article/pii/S2452177916300822MonosilanePolycrystalline siliconSingle crystalsIsotopesIR-spectroscopyImpurity |
| spellingShingle | Vladimir A. Gavva Anatolii V. Gusev Tatiana V. Kotereva Diagnostics of impurity composition of high-purity monosilane by results of the analysis of a test silicon single crystal Modern Electronic Materials Monosilane Polycrystalline silicon Single crystals Isotopes IR-spectroscopy Impurity |
| title | Diagnostics of impurity composition of high-purity monosilane by results of the analysis of a test silicon single crystal |
| title_full | Diagnostics of impurity composition of high-purity monosilane by results of the analysis of a test silicon single crystal |
| title_fullStr | Diagnostics of impurity composition of high-purity monosilane by results of the analysis of a test silicon single crystal |
| title_full_unstemmed | Diagnostics of impurity composition of high-purity monosilane by results of the analysis of a test silicon single crystal |
| title_short | Diagnostics of impurity composition of high-purity monosilane by results of the analysis of a test silicon single crystal |
| title_sort | diagnostics of impurity composition of high purity monosilane by results of the analysis of a test silicon single crystal |
| topic | Monosilane Polycrystalline silicon Single crystals Isotopes IR-spectroscopy Impurity |
| url | http://www.sciencedirect.com/science/article/pii/S2452177916300822 |
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