Abstract
The effects of ALD ZnO passivation of ammonium hydroxide cleaned p-In0.53Ga0.47As is studied in detail with in-situ x-ray photoelectron spectroscopy (XPS), and metal-oxide-semiconductor capacitors (MOSCAPs) are fabricated in order to judge the effectiveness of ZnO as a passivation layer. Diethylzinc (DEZ) and water are used as precursors. Multiple DEZ pulses are used in the first ALD cycle in order to determine the oxide cleanup ability of DEZ. XPS results indicate that DEZ can chemically reduce Ga3+ and As5+ to Ga1+ and As3+ respectively, with the majority of change occurring before the first water pulse. DEZ is found to have minimal oxide cleanup ability, with the overall the amount of As oxide reduced by approximately 15% and Ga oxide remaining unchanged. ZnO passivated MOSCAPs with HfO2 dielectric show significant improvement over MOSCAPs without ZnO passivation. Accumulation frequency dispersion, hysteresis and D it are all reduced dramatically.
Similar content being viewed by others
References
J. A. del Alamo, Nature 479, 317 (2011).
R. Chau, S. Datta, and A. Majumdar, in Compound Semiconductor Integrated Circuit Symposium, 4 (2005).
L. Xia, J. B. Boos, B. R. Bennett, M. G. Ancona, and J. A. del Alamo, Appl. Phys. Lett. 98, 053505 (2011).
S. Suthram, Y. Sun, P. Majhi, I. Ok, H. Kim, H. R. Harris, N. Goel, S. Parthasarathy, A. Koehler, T. Acosta, T. Nishida, H. H. Tseng, W. Tsai, J. Lee, R. Jammy, and S. E. Thompson, in VLSI Technology, 182 (2008).
P. D. Ye, J. Vac. Sci. Technol. A. 26, 697 (2008).
M. Hong, J. R. Kwo, P. Tsai, Y. Chang, M.-L. Huang, C. Chen, and T. Lin, Jpn. J. Appl. Phys. 46, 3167 (2007).
T. Ito and Y. Sakai, Solid-State Electronics 17, 751 (1974).
M. Houssa, E. Chagarov, and A. Kummel, MRS Bulletin. 34, 504 (2009).
J. Robertson and L. Lin, Microelectron. Eng. 88, 1440 (2011).
C. Marchiori, E. Kiewra, J. Fompeyrine, C. Gerl, C. Rossel, M. Richter, J. P. Locquet, T. Smets, M. Sousa, C. Andersson, and D. J. Webb, Appl. Phys. Lett. 96, 212901 (2010).
V. Chobpattana, T. E. Mates, J. Y. Zhang, and S. Stemmer, Appl. Phys. Lett. 104, 182912 (2014).
ITRS: Process Integration, Devices, and Structures (2013).
J. W. Elam, D. Routkevitch, P. P. Mardilovich, and S. M. George, Chem. Mat. 15, 3507 (2003).
M. L. Huang, Y. C. Chang, C. H. Chang, Y. J. Lee, P. Chang, J. Kwo, T. B. Wu, and M. Hong, Appl. Phys. Lett. 87, 252104 (2005).
C. L. Hinkle, A. M. Sonnet, E. M. Vogel, S. McDonnell, G. J. Hughes, M. Milojevic, B. Lee, F. S. Aguirre-Tostado, K. J. Choi, H. C. Kim, J. Kim, and R. M. Wallace, Appl. Phys. Lett. 92, 071901 (2008).
Y. C. Byun, S. Choi, Y. An, P. C. McIntyre, and H. Kim, ACS Appl. Mater. Inter. 6, 10482 (2014).
A. T. Lucero, Y. C. Byun, X. Qin, L. Cheng, R. M. Wallace, and J. Kim (Unpublished).
C. L. Hinkle, M. Milojevic, E. M. Vogel, and R. M. Wallace, Microelectron. Eng. 86, 1544 (2009).
A. P. Kirk, M. Milojevic, J. Kim, and R. M. Wallace, Appl. Phys. Lett. 96, 202905 (2010).
C. H. Chang, Y. K. Chiou, Y. C. Chang, K. Y. Lee, T. D. Lin, T. B. Wu, M. Hong, and J. Kwo, Appl. Phys. Lett. 89, 242911 (2006).
C. L. Hinkle, E. M. Vogel, P. D. Ye, and R. M. Wallace, Curr. Opin. Solid State Mater. Sci. 15, 188 (2011).
R. V. Galatage, D. M. Zhernokletov, H. Dong, B. Brennan, C. L. Hinkle, R. M. Wallace, and E. M. Vogel, J. Appl. Phys. 116, 014504 (2014).
C. L. Hinkle, M. Milojevic, B. Brennan, A. M. Sonnet, F. S. Aguirre-Tostado, G. J. Hughes, E. M. Vogel, and R. M. Wallace, Appl. Phys. Lett. 94, 162101 (2009).
R. Engel-Herbert, Y. Hwang, and S. Stemmer, J. Appl. Phys. 108, 124101 (2010).
C. J. Sandroff, M. S. Hegde, L. A. Farrow, C. C. Chang, and J. P. Harbison, Appl. Phys. Lett. 54, 362 (1989).
A. Janotti and C. G. Van de Walle, Rep. Prog. Phys. 72, 126501 (2009).
S. W. Cho, M. G. Yun, C. H. Ahn, S. H. Kim, and H. K. Cho, Electron. Mater. Lett. 11, 205 (2015).
H. Park, M. Hasan, M. Jo, and H. Hwang, Electron. Mater. Lett. 3, 75 (2007).
Author information
Authors and Affiliations
Corresponding authors
Rights and permissions
About this article
Cite this article
Lucero, A.T., Byun, YC., Qin, X. et al. In-situ XPS study of ALD ZnO passivation of p-In0.53Ga0.47As. Electron. Mater. Lett. 11, 769–774 (2015). https://doi.org/10.1007/s13391-015-5150-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13391-015-5150-6