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How to measure the film thickness of a PVD coating machine?
Release time:
2022-02-23
In our daily lives, many household products are coated with a film using a PVD coating machine, making the products not only more aesthetically pleasing but also more practical. However, many people have a question: since the film is coated, it must have a certain thickness. So, how thick is the film, and how can it be measured? Below is a detailed introduction on how to measure the film thickness after PVD coating, hoping it will be helpful to you:
In our daily lives, many daily necessities are made through pvd coating machine Coating a layer of film makes products not only more beautiful but also more practical. However, many people have a question, that is, since the film is plated, the film must have a thickness, so how thick is the film, and how to measure it? Below is a detailed introduction on how to measure the film after the pvd coating machine, hoping to help you:
The thin film must be deposited on the substrate; therefore, there is no thin film deposition without the substrate. The cleaning quality of the substrate has an important impact on the quality of the thin film. At the same time, the thickness of the thin film must also be known during the thin film manufacturing process. Without the thickness of the thin film, the measurement of the thin film properties is meaningless. Therefore, film thickness measurement and substrate cleaning are important technologies related to thin film manufacturing. The so-called thickness refers to the distance between two completely flat parallel planes, which is a geometric concept. The ideal thin film thickness refers to the distance between the substrate surface and the thin film surface. In the three-dimensional measurement of the thin film morphology, compared with the thickness of the thin film, other two-dimensional can be said to be infinite. In fact, due to the existence of uneven and discontinuous surfaces, there may be pores, impurities, lattice defects, surface adsorbed molecules, etc. in the thin film, and it is actually very difficult to strictly define and measure the thickness of the thin film. The definition of film thickness should be determined according to the method and purpose of field survey. Therefore, for the same type of thin film, different measurement methods will lead to different results, that is, different thicknesses.
The surface in thin film measurement is not a geometric concept but a buried concept, which refers to the collection of surface molecules (atoms). The average surface refers to the algebraic sum of the distances from all points of the surface atoms to this surface being equal to zero.
Various defects, impurities, and adsorbed molecules inevitably exist in the film-making process of the pvd coating machine, so no matter which method is used to define and measure the film thickness, it is an average value. The film thickness containing impurities, defects, and adsorbed molecules is sufficient.
pvd coating machine The coating is carried out in a vacuum chamber. When measuring the thickness of the thin film, professional measuring instruments are needed to measure the thickness. Generally, manufacturers of pvd coating machines will sell such instruments.
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