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As an instrument for measuring the thickness of film layers, the film thickness gauge has been widely applied in many industry fields, especially the optical film thickness gauge, which is favored by many enterprise users and university teachers due to its high measurement accuracy, non-contact nature, and no need to damage the sample. Today, we mainly provide a brief understanding of the optical film thickness gauge.
< 1> The advantages of optical film thickness gauges
1. Non-contact measurement
The optical film thickness gauge measures the thickness of the film layer based on the principle of light reflection. It is a non-contact measurement method that will not cause any damage to the sample and can ensure the integrity of the sample.
2. The measurement data is diverse
The film thickness of the object and the n and k data can be measured.
3. Fast measurement
The measurement process of the optical film thickness gauge is very fast because the structural design of this equipment can greatly improve the measurement efficiency.
4. Wide range of applications
The application scope of optical film thickness gauges is extremely wide, ranging from ordinary household use to industrial production in factories, as well as to university laboratories and scientific research institutes. This clearly shows that its usage range is extensive, and the occasions where it can be used have become more diverse.
< 2> Precautions for using optical film thickness gauges
Zero-point calibration
Before each use of the film thickness gauge, optical calibration is required because the previous measurement parameters will affect the measurement of the object this time. Zero-point calibration can eliminate the influence of the parameters in the previous measurement, reduce the error of the measurement result, and make the measurement result more accurate.
2. The thickness of the substrate should not be too thin
When using an optical film thickness gauge to measure objects, the substrate should not be too thin; otherwise, it will affect the measurement accuracy of the instrument, cause inaccurate data results, and affect the normal progress of the measurement process.
3. Roughness of the object's surface
The surface of the object being measured should not be too rough, as a rough surface is prone to cause light diffraction, reducing the measurement accuracy of the optical film thickness gauge and resulting in significant errors. Therefore, the surface of the object being measured should be kept as smooth as possible to ensure the accuracy of the measurement results.
The advantages of optical film thickness gauges and the precautions for their use have been specifically introduced to you in the above content. If you want to have a further understanding of optical film thickness gauges, please contact us and you can communicate one-on-one with our engineers.
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