In the field of precision manufacturing, from semiconductor chips, high-end optical components to precision medical devices, the microscopic morphology of the product surface directly determines its performance and reliability. Traditional contact measurement or two-dimensional detection methods often fail to meet the increasingly strict quality control requirements in terms of efficiency, accuracy and completeness. At this momentOptical 3D surface profilometerAs a high-precision, non-contact three-dimensional surface topography analysis tool, it is becoming a key and powerful tool for improving quality inspection efficiency and ensuring process consistency. This article will delve into how optical 3D surface profilometers empower the quality inspection process in precision manufacturing.
Traditional measurement methods are mostly limited to single-point height or two-dimensional contour lines. However, optical 3D surface profilometers (such as the KLA Profilm3D model represented by Unicom Technology Co., LTD. (Yiying Technology)) utilize technologies like white light interference to obtain millions of data points on the sample surface within seconds and quickly reconstruct a complete three-dimensional topography map. This "surface scanning" method can simultaneously obtain multiple parameters such as roughness (Ra, Rq, etc.), step height, flatness, and volume in a single measurement, avoiding the accidental errors caused by single-point sampling. It can complete the inspection tasks that originally required multiple times and multiple devices in one stop, significantly improving the inspection efficiency.
For fragile, soft or precisely structured workpieces such as photoresist patterns, MEMS microstructures, flexible coatings or biological samples, contact measurement may cause scratches or deformations. The non-contact feature of the optical 3D surface profilometer perfectly solves this problem. Meanwhile, its vertical resolution can reach the sub-nanometer level, capable of clearly distinguishing extremely minute surface undulations and nanoscale steps. This is crucial for applications such as evaluating the uniformity of thin film thickness in semiconductor manufacturing and verifying the effect of CMP (Chemical Mechanical Polishing) processes.
Modern optical 3D surface profilometers are not only imaging devices but also powerful data analysis platforms. Its supporting software can conduct automated multi-region statistical analysis, trend analysis, and parameter calculation based on international standards such as ISO/ASTM. By correlating measurement data with process parameters, enterprises can quickly identify the source of production fluctuations, achieve a transformation from "post-event detection" to "process monitoring", prevent batch defects in advance, and thereby improve the overall production yield and the predictability of quality inspection.
The measurement accuracy of the optical 3D surface profilometer is extremely sensitive to environmental vibration. Vibrations at the micrometer or even nanometer level can cause the interference fringes to become blurred, affecting the repeatability and accuracy of the measurement results. To ensure that the instrument performs at its best, it is an important step to equip it with a professional active shock absorption system. The HERZ series of active shock absorbers provided by Uniicon Technology Co., LTD. (Yiying Technology) adopt advanced feedback control technology, which can effectively isolate low-frequency environmental vibrations starting from 1Hz. With a fast response time, it can quickly counteract external interference and provide an ultra-stable working reference for profilometers. For instance, its AVI series products feature a relatively fast response speed, and the system design is compact and modular. It can be flexibly configured according to the instrument load, with a strong maximum load-bearing capacity. It can meet the diverse vibration isolation requirements from desktop to large-scale measurement systems, ensuring that every measurement is carried out in a stable environment and guaranteeing the long-term reliability and consistency of the data.
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