In the fields of advanced manufacturing and scientific research, the accuracy of surface morphology measurement equipment directly determines the controllability of the process. Facing numerous challengesContour meter brandA core question that has always plagued engineers is whether the nominal "sub nanometer resolution" can be stably achieved in real production environments? This article takes the actual technical parameters and cases of KLA Profilm3D provided by Unicon Technology as the anchor point, and deeply analyzes the scientific selection method of contour instrument brands from the underlying principles, key indicators, shock absorption matching to service system.
When evaluating the brand of a profilometer, users should focus on accuracy and repeatability. According to the specifications released by Nikon Technology, the accuracy of step height is ≤ 0.7% and the precision is ≤ 0.1%. Converted to absolute values, the measurement error for a 100nm step does not exceed 0.7nm; the RMS repeatability is 1.0nm in WLI mode and only 0.1nm in PSI mode. In addition, the sample reflectivity can be measured directly from 0.05% to 100% - from highly reflective wafer metal layers to low reflective polyimide passivation layers, without the need for spraying conductive films or surface pretreatment. The 100mm automatic XY sample stage and manual leveling device that come standard with Nikon further ensure the consistency of batch sample positioning. At the same time, the 2mm field of view under 10x objective lens combined with 4x optical zoom effectively reduces the frequency of objective lens replacement and reduces operational complexity.
Even though the profilometer brand has excellent mechanical performance, ground micro vibrations (such as building shaking, equipment operation, etc.) are still sufficient to destroy sub nanometer measurement results. Unicon Technology provides a complete active shock absorption solution for this purpose. The active shock absorber platform uses piezoelectric sensors and drivers to detect and cancel vibrations in the range of 1-200Hz in real time, while passive isolation covers frequencies above 200Hz. The system response time is only 5-20 milliseconds, and the noise transmitted to the profiler can be suppressed below 50nG/√ Hz. This scheme has no low-frequency resonance, does not require compressed air, and does not generate electromagnetic interference. Nikon offers flexible configuration based on instrument types: the TS series desktop all-in-one is designed specifically for profilometers and microscopes; The AVI series modular base is suitable for large instruments such as scanning electron microscopes and lithography equipment, with a maximum load capacity of up to 9000 pounds (approximately 4082 kilograms). When selecting a contour instrument brand, whether the supplier has the ability to integrate shock absorption should be a mandatory evaluation item.
The long-term value of the profilometer brand is also reflected in the software ecosystem and after-sales support. The analysis software provided by Younikon Technology supports one click measurement - automatically identifying step height, calculating roughness parameters (Sa, Sq, Sz), outputting film thickness data, and can stitch images of large-area samples to generate complete 3D morphology. In batch detection scenarios, users can preset point maps, and the device automatically completes multi-point measurements and generates 2D/3D distribution maps. At the service level, Younikon has established a standardized 9-step process, with core nodes including: free sample testing for new users (verifying equipment compatibility before procurement), one-on-one technical communication, 8-hour rapid after-sales response, and 7 × 24-hour online support. Its branches in Hong Kong, Shanghai, Dongguan, Tianjin, Chengdu, Suzhou, and other locations throughout the country ensure the implementation of localized services. In addition, Younikon also provides value-added services throughout the entire lifecycle, including spare parts supply, equipment maintenance and repair, and official equipment recycling.
The best way to choose a profilometer brand is to validate it with actual samples. Younikon Technology provides free sample testing services year-round. Taking an advanced packaging enterprise as an example, it needs to detect polyimide passivation layer steps with a thickness of about 5 μ m. Using the WLI mode of the KLA Profilm3D profilometer, full field 3D data can be obtained in a single scan, with a standard deviation of less than 0.8nm for 100 repeated measurements. For deep trench structures in MEMS devices (depths ranging from 50nm to 10mm), the same device can complete full range measurements from shallow to deep trenches. In terms of defect recognition, this technology can detect micro scratches with a width of 0.5 μ m and a height of 10nm, helping process engineers quickly locate etching or CMP anomalies. These measured data confirm that when a profilometer has RMS repeatability ≤ 1.0nm in WLI mode, ≤ 0.1nm in PSI mode, and step height accuracy ≤ 0.7%, it fully has the ability to serve high-end fields such as semiconductors, optical coatings, and new materials.
Overall, a truly sub nanometer level profilometer brand must meet four conditions simultaneously: adopting white light interference dual-mode technology (WLI+PSI), step height accuracy better than 0.7%, reflectivity adaptability range covering 0.05% -100%, and equipped with an active shock absorption system. By integrating the above technical elements and full process services, Younikon Technology provides a verifiable selection reference for the industry. It is recommended to apply for free sample testing services before procurement, and use the repeatability and accuracy data of actual samples as the final decision-making basis.
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