Interface control in the chemical vapor deposition of titanium dioxide on silicon(100)
| Autor: | J. W. Rogers, Yanjun Ma, V. K. Medvedev, Yoshi Ono, Allan C. Tuan, Meeyoung Yoon |
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| Rok vydání: | 2000 |
| Předmět: |
Materials science
Silicon Metals and Alloys chemistry.chemical_element Surfaces and Interfaces Substrate (electronics) Chemical vapor deposition Surfaces Coatings and Films Electronic Optical and Magnetic Materials Amorphous solid chemistry.chemical_compound chemistry Chemical engineering Titanium dioxide Materials Chemistry Thin film Layer (electronics) Titanium |
| Zdroj: | Thin Solid Films. :766-771 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/s0040-6090(00)01453-x |
| Popis: | A novel deposition sequence has been developed for the growth of carbon-free, amorphous titanium dioxide thin films on p-type Si(100) using titanium tetrakis–isopropoxide (TTIP) as the metalorganic precursor. The deposition process occurs in an ultra-high vacuum chamber and consists of three stages. Initially, a continuous layer of titanium was deposited on silicon at a substrate temperature of 650 K using a Ti sublimator. The substrate temperature was then lowered to 300 K and the titanium layer was oxidized using a gas phase oxygen source to form a TiOx buffer layer. Subsequently, a TiO2 thin film was deposited by MOCVD using TTIP at low temperature (below 650 K). Auger electron spectroscopy (AES) performed at each stage of growth showed no detectable carbon contamination. Additional AES measurements suggest that at the process temperature, titanium grows on silicon according to the Stranski–Krastanov mode, which permits the uniform growth of the titanium layer. Finally, X-ray diffraction (XRD) studies show that the thermal decomposition of TTIP produces amorphous TiO2 at 650 K. This unique process allows for the production of a high-quality amorphous titanium dioxide thin film without interfacial carbon contamination. |
| Databáze: | OpenAIRE |
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