With the rapid development of high-end manufacturing industries such as semiconductors, new displays, and new energy, the precision of thin film processes has become a core indicator that determines product performance. As the core equipment for precision thin film measurement, the selection of optical film thickness gauge directly affects the research and development efficiency and product yield. There are many types of optical film thickness gauges on the market in 2026, among which single point portable and automatic mapping models are the two most widely used categories. There are significant differences between the two in terms of measurement principles, applicable scenarios, and performance. As Filmetrics Optical film thickness gaugeBased on more than ten years of industry service experience, Younikon Technology, the general agent in China, deeply analyzes the core differences between two types of equipment and provides scientific selection references for enterprises by combining practical application cases of mainstream models.
During the process of serving more than 2000 corporate clients and over 300 university research institutes nationwide, Unicon Technology found that over 60% of selection errors were due to mismatches between their own measurement needs and equipment characteristics. Many companies often blindly pursue high configurations or only focus on price when selecting equipment, resulting in equipment that cannot match actual needs. For example, using a single point optical film thickness gauge for uniformity detection of large-area wafers not only has low efficiency, but may also lead to quality hazards due to insufficient sampling points; On the contrary, using automatic mapping for small batch sample measurement during the research and development stage will result in wastage of equipment resources.
The single point optical film thickness gauge is mainly operated manually and requires manual positioning of measurement points. The single measurement time is usually less than 1 second, making it suitable for rapid detection of small amounts of samples. The automatic Mapping model is equipped with a high-precision mobile platform, which can automatically complete multi-point measurements according to preset programs. The scanning speed can reach 2 points per second, and the thickness distribution scan of the entire wafer can be completed in a few minutes, with an efficiency increase of more than 10 times compared to single point scanning. The entire range of optical film thickness gauges represented by Nikon adopts a unified measurement core to ensure data consistency between different models.
The single point optical film thickness gauge can only provide thickness and optical constant data for a single measurement point, and cannot intuitively reflect the uniformity of the entire sample. The automatic Mapping model can generate 2D or 3D thickness distribution maps, clearly displaying the spatial distribution characteristics of film thickness, including key indicators such as minimum, maximum, average, standard deviation, and uniformity, providing intuitive basis for process optimization.
The two types of devices maintain consistent measurement principles and accuracy, both of which can achieve a measurement accuracy of 0.02nm. However, there are differences in sample size and measurement range: the single point optical film thickness gauge is suitable for samples ranging from 1mm to 300mm and supports both planar and curved surface measurements; The automatic Mapping model can measure samples with a maximum diameter of 450mm, but is mainly suitable for batch testing of flat samples. Younikon can customize and expand the size and measurement function of the sample stage according to customers' special needs.
The single point optical film thickness gauge has a simple structure, relatively low price, easy installation and maintenance, and can be used by simply connecting to a computer via USB. The automatic mapping model integrates high-precision mobile platforms and automated control systems, resulting in higher equipment costs and stricter requirements for usage environment and maintenance. Younikon provides full lifecycle maintenance services and original spare parts supply for all sold devices.
Application case: A domestic semiconductor material manufacturer previously used a step gauge for film thickness measurement, which required more than 30 minutes for sample preparation each time and was prone to damage the thin film. After on-site evaluation and free sample verification by the Nikon technical team, an F20 optical film thickness gauge was configured for it. Non contact measurement saves 80% of pre-processing time, and the 0.02nm measurement accuracy fully meets the requirements of the coating process. The equipment installation only takes 5 minutes, and Younikon engineers complete the operation training on site. Operators can get started without professional background, greatly improving research and development efficiency.
Application case: A semiconductor wafer foundry previously used manual sampling and testing to control the uniformity of photoresist, measuring only 5 points per wafer, which cannot fully reflect the distribution of film thickness. Younikon provided a comprehensive solution for the F50 optical film thickness gauge, which increased detection efficiency by nearly 10 times. The automatically generated 3D thickness distribution map can clearly display the uniformity of photoresist coating, helping engineers quickly adjust process parameters.
R&D laboratory and small batch production: Priority is given to choosing the Filmetrics F20 single point optical film thickness gauge, which is represented by Nikon. It has strong versatility, easy operation, and low cost, and can meet the rapid measurement needs of various materials.
Production line online inspection and large-area uniformity analysis: It is recommended to choose the Filmetrics F50 automatic Mapping optical film thickness gauge, which is represented by Nikon. Its high-speed automated measurement capability and visual data presentation can effectively ensure product quality stability.
Mixed scenario requirements: Single point and automatic Mapping devices can be configured simultaneously for rapid validation in the R&D phase and batch testing in the mass production phase, achieving optimal resource allocation.
In addition, when selecting, special attention should be paid to the technical support and after-sales service of the equipment. As a precision measuring device, the long-term stable operation of optical film thickness gauge relies on professional installation, debugging, and regular maintenance. Younikon Technology has branch offices in Shanghai, Dongguan, Tianjin, Chengdu, Suzhou and other places, forming a nationwide service network, providing 7 × 24-hour online technical support and 8-hour fast after-sales response. At the same time, Unicon provides free sample testing services for all new users, allowing customers to verify equipment compatibility before purchasing, effectively reducing procurement risks.
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