* Question
What does extension mean?
* Answer
Epitaxy is a process used in materials science where a crystalline film is grown on a crystalline substrate, with the film maintaining the same crystallographic orientation as the substrate. This controlled growth allows for the creation of high-quality, single-crystal layers of materials. Epitaxy is critical in the fabrication of semiconductor devices because it enables the precise formation of layers with specific properties.
There are two main types of epitaxy:
Homoepitaxy: Growth of a film composed of the same material as the substrate, e.g., silicon on silicon.
Heteroepitaxy: Growth of a film of a different material on a substrate, e.g., gallium arsenide (GaAs) on silicon.
Epitaxy is widely used in the semiconductor industry to manufacture chips for electronics, solar cells, and LEDs due to its ability to control the thickness and purity of material layers.
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