With the rapid development of electronic products towards high density, miniaturization, and high performance, the manufacturing process of PCB circuit boards is becoming increasingly precise. As a key factor affecting the reliability and conductivity of circuit boards, the control of coating thickness directly determines the quality level of the product. In this context, imported film thickness gauges have become an important tool for detecting coating thickness in the PCB industry due to their advantages of high precision, non-contact, and fast measurement. This article will focus on the requirements of PCB circuit board coating detection and provide an in-depth analysisImported film thickness gaugeProfessional solutions.
During the production process, PCB circuit boards undergo various surface treatment processes such as immersion gold, immersion silver, tin plating, nickel plating, OSP, etc. These coatings not only protect the copper foil from oxidation, but also directly affect the welding performance, conductivity reliability, and service life.
Thin coating: may lead to poor welding, poor corrosion resistance, and affect the stability of the product in harsh environments.
Thick coating: Not only does it increase costs, but it may also cause issues such as dimensional deviations and welding short circuits.
Therefore, achieving precise, fast, and repeatable measurement of coating thickness has become a key link for PCB manufacturing enterprises to improve their quality control capabilities.
Taking the Filmetrics series imported film thickness gauge represented by Younikon Technology Co., Ltd. (Yiying Technology) as an example, this equipment adopts the principle of light reflection measurement. By analyzing the spectral interference phenomenon of reflected light at the thin film interface, the coating thickness is accurately calculated. The specific principle is as follows:
When the incident light shines on the surface of the PCB, it will reflect at different material interfaces (such as air/coating, coating/copper substrate). Due to the fluctuation of light, these reflected lights interfere with each other, forming spectral oscillations. By analyzing the oscillation frequency, the distance between each interface can be inferred to obtain the coating thickness.
This non-contact measurement method will not cause any damage to the PCB surface, especially suitable for soft boards, thin boards, or precision boards that have completed circuit processing.
Among numerous imported film thickness gauge models, Filmetrics F20 is a versatile single point testing device widely used for PCB coating thickness detection. Its main features include:
Wide measurement range: capable of measuring thicknesses from 15nm to 70 μ m, covering common PCB coatings such as gold and silver plating OSP、 Nickel layer, etc.
High precision: The measurement accuracy can reach 0.02nm, meeting the strict requirements of thickness control in high-end PCB processes.
Fast measurement speed: After configuration is completed, measurement results can be output within seconds, suitable for batch testing on production lines.
Non contact non-destructive: Avoiding the risk of scratches or contamination that may arise from traditional contact measurement.
F20 is suitable for various metal coatings such as gold, silver, tin, nickel, copper, etc. It can also measure transparent or semi transparent organic coatings to meet the diverse process requirements of PCB.
For PCB boards that require large-area, multi-point thickness monitoring, Filmetrics F50 automated film thickness gauge is a more efficient choice. This device supports automatic mapping and mapping, which can quickly generate a thickness distribution map of the entire board and present it in 2D or 3D form, helping engineers intuitively identify coating uniformity issues.
Measurement speed: about 2 points per second, greatly improving detection efficiency.
Sample size: Supports up to 450mm diameter board, compatible with common PCB panel specifications.
Surveying function: Users can customize point maps and support batch data recording and analysis.
F50 is widely used in PCB manufacturing processes such as gold plating, nickel plating, and tin plating, helping the production line achieve visual control of the entire board thickness.
Some PCB designs include small solder pads, thin lines, or localized coating areas, making it difficult to accurately locate conventional light spots. The Filmetrics F40 imported film thickness gauge is equipped with a 1-micron micro spot, which can accurately measure the coating thickness in small areas and is suitable for precision products such as high-density interconnect boards and carrier boards.
The minimum diameter of the light spot can reach 1 μ m, which meets the requirements of detecting micro line coatings.
Real time camera monitoring: Ensure accurate positioning of measurement points.
Support graphic recognition: suitable for automatic detection of PCB boards with graphics.
As the general agent of Filmetrics film thickness gauge in China, Younikon Technology Co., Ltd. (Yiying Technology) has over ten years of industry experience in the field of thin film measurement. The company not only provides high-quality imported film thickness gauges, but also builds a complete thickness detection solution based on the actual needs of PCB manufacturing enterprises.
Free sample testing service: Prior to procurement, samples can be provided for actual testing to verify equipment compatibility.
Standard operating procedure: From requirement communication, sample testing, equipment selection to installation, debugging, training and acceptance, the entire process is standardized and serviced.
Quick after-sales response: 24/7 online support, quick response within 8 hours, ensuring stable operation of the production line.
National service network: There are branch offices in Shanghai, Dongguan, Tianjin, Chengdu, Suzhou and other places to facilitate the implementation of localized services.
According to practical application cases, the performance of the Filmetrics series imported film thickness gauge in PCB coating detection is as follows:
Measurement range of gold layer thickness: 0.01 μ m-5 μ m, with an accuracy of ± 0.001 μ m.
The measurement range of nickel layer thickness is 0.1 μ m-50 μ m, which meets the requirements of conventional nickel gold process.
Repeatability stability: Multiple measurements with a standard deviation of ≤ 0.05nm ensure reliable data.
Measurement spot: standard 1.5mm, minimum up to 20 μ m (depending on model configuration), suitable for different line densities.
These data fully demonstrate that the imported film thickness gauge has the characteristics of high precision, high stability, and high adaptability in PCB coating thickness detection.
With the continuous upgrading of the PCB industry towards high precision and high reliability, the detection of coating thickness has shifted from an "auxiliary process" to a "critical quality control node". The imported film thickness gauge, with its non-contact, high-precision, and fast measurement technology advantages, is becoming an important tool for PCB manufacturing enterprises to enhance their competitiveness.
As the general agent of Filmetrics film thickness gauge in China, Younikon Technology Co., Ltd. (Yiying Technology) is committed to providing professional and reliable thickness detection solutions for PCB industry customers. For more product information, please visit the company's official website:https://www.unicorn-tech.com/Or check the product page of the film thickness gauge:https://www.unicorn-tech.com/product/list-154.htmlObtain more technical information and application cases.
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