Design and spectroscopic reflectometry characterization of pulsed laser deposition combinatorial libraries
| Autor: | Nabil Bassim, Martin L. Green, Makoto Otani, Peter K. Schenck, Hiroyuki Oguchi |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Excimer laser medicine.medical_treatment Analytical chemistry General Physics and Astronomy Surfaces and Interfaces General Chemistry Condensed Matter Physics Laser Fluence Surfaces Coatings and Films law.invention Pulsed laser deposition law medicine Deposition (phase transition) Thin film Reflectometry Spectroscopy |
| Zdroj: | Applied Surface Science. 254:781-784 |
| ISSN: | 0169-4332 |
| Popis: | The goal of the design of pulsed laser deposition (PLD) combinatorial library films is to optimize the compositional coverage of the films while maintaining a uniform thickness. The deposition pattern of excimer laser PLD films can be modeled with a bimodal cos n distribution. Deposited films were characterized using a spectroscopic reflectometer (250–1000 nm) to map the thickness of both single composition calibration films and combinatorial library films. These distribution functions were used to simulate the composition and thickness of multiple target combinatorial library films. The simulations were correlated with electron-probe microanalysis wavelength-dispersive spectroscopy (EPMA-WDS) composition maps. The composition and thickness of the library films can be fine-tuned by adjusting the laser spot size, fluence, background gas pressure, target geometry and other processing parameters which affect the deposition pattern. Results from compositionally graded combinatorial library films of the ternary system Al 2 O 3 –HfO 2 –Y 2 O 3 are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect