In modern manufacturing, coating machines are important equipment whose performance directly affects the quality and production efficiency of thin film products. The following are several key technical parameters and their importance of coating machines:

1. Vacuum degree

During the coating process, a high vacuum environment (usually below 10 ⁻ ³ Pa) is essential. This environment can effectively reduce the pollution of gas molecules on the film, thereby significantly improving the purity of the film. High vacuum not only helps to improve the physical and chemical properties of the film, but also ensures its long-term stability and reliability.

2. Sedimentation rate

The sedimentation rate refers to the thickness of the thin film deposited per unit time, which directly affects production efficiency. A higher deposition rate can complete thin film preparation in a short period of time, improving production efficiency; However, excessively high deposition rates may lead to a decrease in film quality, so it is necessary to optimize the deposition rate while ensuring quality.

3. Film uniformity

The uniformity of thin films includes two aspects: thickness uniformity and chemical composition uniformity. For optical coating, thickness uniformity is particularly important, and roughness is usually required to be controlled within 1/10 of the visible light wavelength range. High uniformity films not only ensure the stability of optical performance, but also extend the service life of products.

4. Adhesion

Adhesion refers to the bonding strength between the film and the substrate. This parameter is influenced by both substrate surface treatment (such as cleaning, activation) and deposition processes. Good adhesion is a key factor in ensuring that the film does not fall off or peel off during use, which directly affects the reliability and safety of the product.

5. Temperature control

The substrate temperature plays an important role in the coating process, as it directly affects the crystalline structure and stress distribution of the film. Accurately controlling the substrate temperature based on the characteristics of different materials can effectively optimize the physical and chemical properties of the film, thereby improving the overall product quality.

In summary, vacuum degree, deposition rate, film uniformity, adhesion, and temperature control are key technical parameters of the coating machine, and the optimization of each parameter is related to the quality and production efficiency of the final product. Mastering and reasonably regulating these parameters is the key to ensuring the success of the coating process.