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Case Studies Customer Testimonials — Thickness

Case 1: Thickness Measurement of Glass

Industry Semiconductors, LCD Industry
Application Thickness measurement of glass
Model Adopted

We used to perform thickness measurement of glass using laser displacement sensors from another company. Tracking errors occurred with patterned surfaces, and we couldn't seem to improve inspection cycle times. Using KEYENCE's LK Series of laser displacement sensor, we were able to eliminate tracking errors and improve inspection cycle times.

Customer
Testimonial

Thank you for using KEYENCE products.
Tracking errors occur because of differences in the reflectance of glass surfaces and some patterned surfaces. The LK Series laser displacement sensors offer high-speed control of emission times and emission power so the received light is constantly optimized for the surface. This makes it possible to minimize the impact of tracking errors.

KEYENCE

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Case 2: Film Thickness Measurement of Multi-layered Films

Industry Electronic and Electrical Industry
Application Film thickness measurement of multi-layered films
Model Adopted

Before, we measured the thickness of transparent multi-layer film using X-ray film thickness meters. Because of the large measurement area, we couldn't handle the various thicknesses of fine films. Using KEYENCE's spectral interference laser displacement sensors, we were able to measure even fine film thicknesses, which allowed us to optimize control of the discharge flow and pressure as well as the feed speed.

Customer
Testimonial

Thank you for using KEYENCE products.
The SI Series of spectral interference laser displacement sensors, thickness measurement is performed with a small beam spot of just 30 µm. This enables accurate measurement all the way to the edge. The SI Series can be an effective tool for detecting winding-shape defects and preventing banding.

KEYENCE

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Case 3: Thickness Measurement of Wafers

Industry Semiconductors, LCD Industry
Application Thickness measurement of wafers
Model Adopted

Contact-type sensors were used to measure wafer thickness. These devices sometimes broke wafers or caused other problems, such as scratches. For this reason, we were considering non-contact measurement systems. With KEYENCE's SI-R Series, we never have to worry about damaging wafers. The sensor head is small, so we were able to install the device into our equipment to constantly monitor wafer thickness.

Customer
Testimonial

Thank you for using KEYENCE products.
The SI-R Series of spectral interference laser displacement sensors use a near-infrared SLD that is capable of transmitting through semiconductors, including Si, GaAs, SiC, InP, and a-Si. This allows for accurate wafer thickness measurement even with BG tape attached.

KEYENCE

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Case 4: Thickness Measurement of Uncut Noodle Sheets

Industry Food Industry
Application Thickness measurement of uncut noodle sheets
Model Adopted

For inspecting the thickness of noodles, we used a hand micrometer. Our results varied greatly, especially for soft noodles, due to different contact pressure during measurement. Using KEYENCE's LK Series of laser displacement sensor, we were able to handle thickness measurements in-line. And because the LK Series utilizes non-contact measurement, we were able to resolve the issue of operator error.

Customer
Testimonial

Thank you for using KEYENCE products.
Our devices have often been used for noodle thickness measurement. During noodle production, flour is a constant presence in the air. However, With the LK Series of laser displacement sensors, stable measurement is possible with no influence from flour thanks to a built-in median filter that cancels out any unexpected values.

KEYENCE

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Case 5: Thickness Measurement of Rubber Sheets

Industry Resin and Rubber Industry
Application Thickness Measurement of Rubber Sheets
Model Adopted

We previously performed thickness measurement of rubber sheets in-line using conventional laser displacement sensors. However, the sensors could not support stricter product tolerances, so we tried out LK Series laser displacement sensors from KEYENCE. The LK Series handled the stricter tolerances and helped to us to resolve our issue measurement variations due to the surface roughness.

Customer
Testimonial

Thank you for using KEYENCE products.
The LK Series of laser displacement sensor offers a sampling speed of 392 kHz, the fastest in the world. The ability to average a large amount of data obtained under such high sampling speeds allows for stable thickness measurement even with in-line measurement.

KEYENCE

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Case 6: Thickness Measurement of Laminated Layers on Motor Core

Industry Transport/Metals Industry
Application Thickness Measurement of Laminated Layers on Motor Core
Model Adopted

For laminated motor cores, device performance changes depending on the number of laminated layers. For this reason, we first visually checked whether the specified number of core layers had been set. By using KEYENCE's LK Series of laser displacement sensor for in-line thickness measurement, we were able to inspect our products automatically.

Customer
Testimonial

Thank you for using KEYENCE products.
For thickness measurement, micron scale accuracies are required for determining whether the number of cores is within the specified range. LK Series laser displacement sensors employ an optical design that reduces the influence of surface roughness and utilizes proprietary components to enable high-accuracy measurement regardless of the target.

KEYENCE

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Case 7: Thickness Measurement of Glass Panel Sealant

Industry Transport/Metals Industry
Application Thickness Measurement of Glass Panel Sealant
Model Adopted

A camera was used to inspect glass panel sealant application. The camera allowed us to perform coating crack inspections, but we also needed to inspect the inclination of the sealant. For this, we adopted the LJ Series 2D laser displacement sensor from KEYENCE. With the sensor head fixed to the dispenser, we were able to not only look at coating cracks but also measure the thickness, width, and cross-sectional area of the sealant.

Customer
Testimonial

Thank you for using KEYENCE products.
The LJ Series 2D laser displacement sensor boasts the fastest sampling speed in the world. Even when controlling a dispenser at high speed, it is possible to measure the interposed pitch and thus prevent sealing failures.

KEYENCE

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