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Title: Gamma and proton irradiation effects and thermal stability of electrical characteristics of metal-oxide-silicon capacitors with atomic layer deposited Al2O3 dielectric

Abstract

The radiation hardness and thermal stability of the electrical characteristics of atomic layer deposited Al2O3 layers to be used as passivation films for silicon radiation detectors with slim edges are investigated. To directly measure the interface charge and to evaluate its change with the ionizing dose, metal-oxide-silicon (MOS) capacitors implementing differently processed Al2O3 layers were fabricated on p-type silicon substrates. Qualitatively similar results are obtained for degradation of capacitance–voltage and current–voltage characteristics under gamma and proton irradiations up to equivalent doses of 30 Mrad and 21.07 Mrad, respectively. While similar negative charge densities are initially extracted for all non-irradiated capacitors, superior radiation hardness is obtained for MOS structures with alumina layers grown with H2O instead of O3 as oxidant precursor. Competing effects between radiation-induced positive charge trapping and hydrogen release from the H2O-grown Al2O3 layers may explain their higher radiation resistance. Finally, irradiated and non-irradiated MOS capacitors with differently processed Al2O3 layers have been subjected to thermal treatments in air at temperatures ranging between 100 °C and 200 °C and the thermal stability of their electrical characteristics has been evaluated. Partial recovery of the gamma-induced degradation has been noticed for O3-grown MOS structures. Lastly, this can be explained by amore » trapped holes emission process, for which an activation energy of 1.38 ± 0.15 eV has been extracted.« less

Authors:
;  [1];  [2];  [3];  [3];  [3];  [4];  [4];  [1];  [5];  [5];  [5];  [5];  [5]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Instituto de Microelectonica de Barcelona, IMB-CNM (CSIC), Bellaterra (Spain)
  3. Univ. of California, Santa Cruz, CA (United States)
  4. U.S. Naval Research Lab., Washington, D.C. (United States)
  5. Univ. of New Mexico, Albuquerque, NM (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1257955
Alternate Identifier(s):
OSTI ID: 1397330
Report Number(s):
BNL-112248-2016-JA
Journal ID: ISSN 0038-1101; KA2101020
Grant/Contract Number:  
SC00112704; FG02-13ER41983; SC0010107
Resource Type:
Accepted Manuscript
Journal Name:
Solid-State Electronics
Additional Journal Information:
Journal Volume: 116; Journal Issue: C; Journal ID: ISSN 0038-1101
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; Al2O3; ALD; gamma irradiation; proton irradiation; irradiation effects; thermal stability

Citation Formats

J. M. Rafi, Lynn, D., Pellegrini, G., Fadeyev, V., Galloway, Z., Sadrozinski, H. F. -W., Christophersen, M., Philips, B. F., Kierstead, J., Hoeferkamp, M., Gorelov, I., Palni, P., Wang, R., and Seidel, S. Gamma and proton irradiation effects and thermal stability of electrical characteristics of metal-oxide-silicon capacitors with atomic layer deposited Al2O3 dielectric. United States: N. p., 2015. Web. doi:10.1016/j.sse.2015.11.029.
J. M. Rafi, Lynn, D., Pellegrini, G., Fadeyev, V., Galloway, Z., Sadrozinski, H. F. -W., Christophersen, M., Philips, B. F., Kierstead, J., Hoeferkamp, M., Gorelov, I., Palni, P., Wang, R., & Seidel, S. Gamma and proton irradiation effects and thermal stability of electrical characteristics of metal-oxide-silicon capacitors with atomic layer deposited Al2O3 dielectric. United States. https://doi.org/10.1016/j.sse.2015.11.029
J. M. Rafi, Lynn, D., Pellegrini, G., Fadeyev, V., Galloway, Z., Sadrozinski, H. F. -W., Christophersen, M., Philips, B. F., Kierstead, J., Hoeferkamp, M., Gorelov, I., Palni, P., Wang, R., and Seidel, S. Fri . "Gamma and proton irradiation effects and thermal stability of electrical characteristics of metal-oxide-silicon capacitors with atomic layer deposited Al2O3 dielectric". United States. https://doi.org/10.1016/j.sse.2015.11.029. https://www.osti.gov/servlets/purl/1257955.
@article{osti_1257955,
title = {Gamma and proton irradiation effects and thermal stability of electrical characteristics of metal-oxide-silicon capacitors with atomic layer deposited Al2O3 dielectric},
author = {J. M. Rafi and Lynn, D. and Pellegrini, G. and Fadeyev, V. and Galloway, Z. and Sadrozinski, H. F. -W. and Christophersen, M. and Philips, B. F. and Kierstead, J. and Hoeferkamp, M. and Gorelov, I. and Palni, P. and Wang, R. and Seidel, S.},
abstractNote = {The radiation hardness and thermal stability of the electrical characteristics of atomic layer deposited Al2O3 layers to be used as passivation films for silicon radiation detectors with slim edges are investigated. To directly measure the interface charge and to evaluate its change with the ionizing dose, metal-oxide-silicon (MOS) capacitors implementing differently processed Al2O3 layers were fabricated on p-type silicon substrates. Qualitatively similar results are obtained for degradation of capacitance–voltage and current–voltage characteristics under gamma and proton irradiations up to equivalent doses of 30 Mrad and 21.07 Mrad, respectively. While similar negative charge densities are initially extracted for all non-irradiated capacitors, superior radiation hardness is obtained for MOS structures with alumina layers grown with H2O instead of O3 as oxidant precursor. Competing effects between radiation-induced positive charge trapping and hydrogen release from the H2O-grown Al2O3 layers may explain their higher radiation resistance. Finally, irradiated and non-irradiated MOS capacitors with differently processed Al2O3 layers have been subjected to thermal treatments in air at temperatures ranging between 100 °C and 200 °C and the thermal stability of their electrical characteristics has been evaluated. Partial recovery of the gamma-induced degradation has been noticed for O3-grown MOS structures. Lastly, this can be explained by a trapped holes emission process, for which an activation energy of 1.38 ± 0.15 eV has been extracted.},
doi = {10.1016/j.sse.2015.11.029},
journal = {Solid-State Electronics},
number = C,
volume = 116,
place = {United States},
year = {Fri Dec 11 00:00:00 EST 2015},
month = {Fri Dec 11 00:00:00 EST 2015}
}

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Cited by: 15 works
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