High precision measurement of film thickness is crucial in its manufacturing process, as it not only affects process quality but also directly impacts the performance of the final product. Therefore, to ensure the excellent quality of each material, precise measurement of film thickness is an indispensable part;

Akusense Sensing meets the thin film measurement needs of various industries with its ultra-high precision measurement parameters and multi-layer film measurement capabilities. In this issue, Xiao Ming will share the role of Meiji Sensing in precision measurement of multi-layer films~

Testing requirements

Tested material: PET multi-layer film

Need to test: thickness of two layers of film and thickness of the central air layer

Precision measurement accuracy requirement: 1um

Precision measurement solution

1. Select Akusense Spectral Confocal Instrument ADV-12CKS to complete online measurement of film thickness, which can detect up to 5 displacement surfaces and 4 layers of thickness

2. Spectral confocal principle, color confocal displacement sensor uses a specially designed color coded lens to generate axial dispersion output of visible light, and the confocal echo signal is analyzed by a spectral analyzer. The actual position value of the measured object is calculated through the conversion relationship between wavelength and displacement, and the measurement effect is more accurate

3. Select ACC-008L probe according to the range and accuracy requirements, with a minimum resolution of 0.02um and a linearity of ± 0.15um

4. There are abundant communication interfaces, including analog, 232, Ethernet communication, encoder control, etc

5. 4KHz sampling frequency for efficient detection