Formation of strontium template on Si(1 0 0) by atomic layer deposition |
| |
| Authors: | C.B. ZhangL. Wielunski B.G. Willis |
| |
| Affiliation: | a Department of Chemical, Materials, and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, United States
b Physics and Astronomy Department, Rutgers University, New Brunswick, NJ, United States |
| |
| Abstract: | The formation of ordered Sr overlayers on Si(1 0 0) by Atomic Layer Deposition (ALD) from bis(triisopropylcyclopentadienyl) Strontium (Sr(C5iPr3H2)2) and H2O has been investigated. SrO overlayers were deposited on a 1-2 nm SiO2/Si(1 0 0) substrate, followed by a deoxidation process to remove the SiO2 layer at high temperatures. Auger electron spectroscopy, Rutherford backscattering spectrometry, spectroscopic ellipsometry, and low-energy electron diffraction were used to investigate the progress of both ALD and deoxidation processes. Results show that an ordered Sr/Si(1 0 0) surface with 2 × 1 pattern can be obtained after depositing several monolayers of SrO on Si using ALD followed by an anneal at 800-850 °C. The (2 × 1) ordered Sr/Si(1 0 0) surface is known to be an excellent template for the epitaxial growth of SrTiO3 (STO) oxide. The present results demonstrate that ALD is a potential alternative to molecular beam epitaxy methods for the fabrication of epitaxial oxides on semiconductor substrates. |
| |
| Keywords: | Silicon Atomic layer deposition Catalyzed deoxidation process Strontium High-k oxides |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
