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  4. Evaluation of secondary electron intensities for dopant profiling in ion implanted semiconductors: a correlative study combining SE, SIMS and ECV methods
 
research article

Evaluation of secondary electron intensities for dopant profiling in ion implanted semiconductors: a correlative study combining SE, SIMS and ECV methods

Kumar, C. N. Shyam
•
Tabean, Saba
•
Morisset, Audrey  
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August 1, 2021
Semiconductor Science And Technology

This study evaluates the secondary electron (SE) dopant contrast in scanning electron microscopy (SEM) and helium ion microscopy (HIM) on boron implanted silicon sample. Complementary techniques like secondary ion mass spectrometry and electrochemical capacitance voltage (ECV) measurements are used to understand the dopant profile and active dopant distribution before and after a thermal firing, a step carried out to remove implantation damage and to electrically activate the implanted boron. Thermal firing resulted in an activation efficiency of 33%. HIM showed higher contrast than SEM having more defined peak with a lower background contribution. Variations in dopant concentration near the peak maximum were observed in ECV measurements, which was not observed in the intensity profiles from both SEM and HIM. This study demonstrates the effectiveness of SE dopant profiling as a quick tool to map the electrically active dopant concentrations even in far-from-equilibrium materials such as ion implanted samples.

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Type
research article
DOI
10.1088/1361-6641/ac0854
Web of Science ID

WOS:000667943400001

Author(s)
Kumar, C. N. Shyam
Tabean, Saba
Morisset, Audrey  
Wyss, Philippe  
Lehmann, Mario  
Haug, Franz-Josef  
Jeangros, Quentin  
Hessler-Wyser, Aioha
Valle, Nathalie
Wirtz, Tom
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Date Issued

2021-08-01

Publisher

IOP PUBLISHING LTD

Published in
Semiconductor Science And Technology
Volume

36

Issue

8

Article Number

085003

Subjects

Engineering, Electrical & Electronic

•

Materials Science, Multidisciplinary

•

Physics, Condensed Matter

•

Engineering

•

Materials Science

•

Physics

•

dopant profiling

•

helium ion microscopy

•

secondary electrons

•

secondary ion mass spectrometry

•

electrochemical capacitance-voltage

•

helium ion

•

scanning-electron

•

mass-spectrometry

•

image-contrast

•

work function

•

silicon

•

boron

•

diffusion

•

microscopy

•

resolution

Editorial or Peer reviewed

REVIEWED

Written at

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Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/180010
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