CVD-ALD Etching Process and Sputtering Process for Gas Analyzer
Release time:
2023-07-19 11:15
Source:
CVD-ALD is a method that uses chemical reactions to deposit thin films layer by layer on the surface of a substrate. It involves introducing a gaseous precursor into a reaction chamber and chemically reacting it by heat, light or plasma excitation to form a deposit. The CVD-ALD process has a high degree of control and uniformity, and can prepare a film with uniform thickness and good compactness.
Sputtering process is a method that uses high-energy ions to bombard a solid target to make its surface atoms or molecules escape and deposit on the substrate. In the sputtering process, atoms on the target are excited by arc discharge or ion beam bombardment, thereby forming an ion beam, hitting the surface of the substrate and forming a thin film. The sputtering process is simple and can produce high quality thin films.
The main difference between the two processes is that CVD-ALD is a chemical reaction method, while sputtering is a physical process. CVD-ALD is more suitable for the preparation of complex compound films, with better uniformity and control, but requires higher temperature and vacuum conditions. The sputtering process is more suitable for the preparation of metal and alloy films, with higher deposition rate and lower process temperature, but the uniformity and control of the film are poor.
In summary, the CVD-ALD-etching process and the sputtering process are common thin film preparation processes, the difference lies in their working principle and scope of application. According to different application requirements and material characteristics, a suitable process can be selected for film preparation.
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