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Quantification of secondary-ion-mass spectroscopy depth profiles using maximum entropy deconvolution with a sample independent response function
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UNSPECIFIED (1998) Quantification of secondary-ion-mass spectroscopy depth profiles using maximum entropy deconvolution with a sample independent response function. In: 4th Meeting of the Ultra-Shallow Junctions Workshop on Measurement and Characterization of Ultra-Shallow Doping Profiles in Semiconductors, RES TRIANGLE PK, NORTH CAROLINA, APR 07-09, 1997. Published in: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 16 (1). pp. 377-381. ISSN 1071-1023.
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Abstract
We describe a new method for extracting the secondary-ion-mass spectroscopy response function from measured data for Slayers. The method was developed to reduce the danger of incorporating sample dependent behavior in the response, and is particularly appropriate for use with sub-keV profile energies where the depth resolution is so high that structure can be observed in layers with nm-scale thickness. We demonstrate this method on a system of variously spaced boron delta layers grown in silicon by molecular beam epitaxy. The deconvolved boron distributions for different primary ion beam energies, ranging from 500 eV to 6 keV, appear to be self-consistent and the corresponding depth resolutions are all increased significantly. Deltas with a 2 nm spacing are resolved without deconvolution using a normally incident 250 eV O-2(+) beam and the depth resolution (Rayleigh criterion) achievable under these conditions with deconvolution is <1 nm. Segregation of boron at the near surface side of the delta layers is clearly visible in these deconvolved data. These features would have been removed using an uncorrected response. (C) 1998 American Vacuum Society.
| Item Type: | Conference Item (UNSPECIFIED) | ||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology Q Science > QC Physics |
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| Journal or Publication Title: | JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B | ||||
| Publisher: | AMER INST PHYSICS | ||||
| ISSN: | 1071-1023 | ||||
| Official Date: | January 1998 | ||||
| Dates: |
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| Volume: | 16 | ||||
| Number: | 1 | ||||
| Number of Pages: | 5 | ||||
| Page Range: | pp. 377-381 | ||||
| Publication Status: | Published | ||||
| Title of Event: | 4th Meeting of the Ultra-Shallow Junctions Workshop on Measurement and Characterization of Ultra-Shallow Doping Profiles in Semiconductors | ||||
| Location of Event: | RES TRIANGLE PK, NORTH CAROLINA | ||||
| Date(s) of Event: | APR 07-09, 1997 |
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