In today's highly competitive 3C (computer, communication, and consumer electronics) market, the aesthetic appeal and refinement of products have become important criteria for consumers' choices. From the metal frames of mobile phones to the curved glass of smartwatches, any minor defect, scratch or dimensional deviation may affect product quality. Therefore, efficient and accurate appearance inspection technology is of vital importance. This article will provide you with an in-depth analysisSurface profilometerThe key application in the appearance inspection of 3C products helps you have a comprehensive understanding of this precision measuring tool.
Surface profilometers, especially optical profilometers, are high-precision instruments used to measure the surface topography of objects. It adopts advanced technologies such as white light interference or confocal focusing to obtain three-dimensional information of the sample surface in a non-contact manner. Take the KLA Profile 3D optical profilometer, which is represented by Unicom Technology Co., LTD. (Yiying Technology), as an example. It utilizes vertical interference scanning (WLI) and phase interference (PSI) technologies to achieve sub-nanometer surface topography research. When white light passes through a beam splitter and is respectively projected onto the surface of the sample and the surface of the reference mirror, the two reflected beams will interfere. By analyzing the brightness and position changes of the interference fringes, the height of each point on the sample surface can be accurately calculated, thereby generating three-dimensional topography data. This non-contact measurement method is particularly suitable for fragile or sensitive materials commonly found in 3C products, such as screen glass and coatings, and can effectively prevent damage.
The surface profilometer, with its high precision and non-contact features, plays an irreplaceable role in multiple links of 3C product production, ensuring the refinement of product appearance and the consistency of function.
Surface contour measurement of mobile phones and smart wearable devices
With the evolution of 3C product design language, 2.5D and 3D curved glass have become mainstream. Whether it is the curvature of a mobile phone's back cover or the edge of a smartwatch's screen, whether the transition of their curved surfaces is smooth directly affects the grip feel and visual aesthetics. The surface profilometer can precisely measure the profile, radius of curvature and step height of any cross-section of curved glass. For instance, when measuring the thickness of the anodized film on a mobile phone or an iWatch, it can provide accurate data support, ensuring the consistency and aesthetic appeal of the surface treatment.
Detection of roughness and step height of precision structural components
3C products contain a large number of precision metal structural components inside, such as middle frames, card trays, buttons, etc. The surface roughness of these components not only affects the hand feel but also relates to the subsequent spraying or coating process. Meanwhile, the section difference (step height) at the junctions of different materials is also a key point of control. The surface profilometer can quickly measure the surface roughness parameters (such as Ra, Rz) and step height of these areas, ensuring that the assembled products are smooth and flat without a rough feel. Its vertical resolution can reach the sub-nanometer level (1nm), fully meeting the most demanding processing requirements.
Quality monitoring of screen glass and protective coatings
The mobile phone screen not only needs to have good light transmission, but also the uniformity and thickness of the waterproof coating and anti-fingerprint coating (AF coating) on its surface are of vital importance. The surface profilometer can non-destructively measure the thickness of these nanoscale coatings and evaluate their uniformity. At the same time, for the screen glass itself, it is also possible to detect whether there are any minor scratches, foreign objects or etching defects on its surface. For instance, the Filmetrics F50 series film thickness gauge, with its automated multi-point measurement function, can quickly generate coating thickness distribution maps, providing intuitive data for process monitoring.
To ensure the accuracy and reliability of the measurement results, when choosing a surface profilometer, attention should be paid to its core performance indicators. Based on the product information provided by Unicom Technology Co., LTD. (Yiying Technology), the following parameters deserve special attention:
Measurement range and accuracy: An excellent surface profilometer should be capable of covering measurement requirements from the nanometer to the millimeter level. For instance, the thickness measurement range of KLA Profilm3D can cover from 50nm to 10mm (WLI mode), the step height accuracy can reach 0.7%, and the repeatability accuracy is as low as 0.1nm (PSI mode), which provides a guarantee for the measurement from ultra-thin coatings to macroscopic structural components.
Sample reflectivity adaptability: 3C products are made of diverse materials, ranging from high-reflectivity metals to low-reflectivity black plastics. The adaptability of the instrument is of vital importance. Profilm3D is compatible with sample reflectance ranging from 0.05% to 100%, which means that stable measurements can be achieved for both glossy metals and matte materials.
Automation and Efficiency: In mass production inspection, measurement efficiency directly affects production capacity. Features like the 100mm automatic XY sample stage that comes standard with the KLA Profilm3D and its ability to support software splicing to obtain measurement data over a larger area can significantly enhance detection efficiency and meet the rapid response requirements of production lines.
In conclusion, surface profilometers, with their non-contact, high-precision and high-repeatability technical features, have been deeply integrated into every stage of 3C product development from research and development to mass production. It can not only quantify microscopic defects that are difficult to detect with the naked eye, but also provide key data support for the optimization of production processes. In today's pursuit of ultimate design and outstanding quality, choosing a reliable surface profilometer is an important part of enhancing the competitiveness of products.
About Us: Since its establishment, Unicon Technology Co., LTD. (Yiying Technology) has been dedicated to the field of precision film measurement and laboratory environment optimization. It is the general agent of Filmetrics film thickness gauges in China. We are committed to safeguarding your precision instruments with professional products and considerate services.
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