In precision industries such as semiconductor manufacturing, optical coating, and new energy materials, the uniformity and accuracy of film thickness directly determine product performance and yield. Traditional film thickness measurement relies on manual positioning or fixed point detection, which has pain points such as low efficiency, incomplete data coverage, and large human errors. The thin film thickness measuring instrument equipped with the electric R-Theta platform achieves a leap from "single point sampling" to "global surveying" through automated polar coordinate scanning and high-precision positioning, providing a revolutionary solution for industrial quality control.

　　1、 R-Theta platform: the precise foundation of polar coordinate scanning

The electric R-Theta platform consists of two axes: rotation (Theta) and radial movement (R), which can simulate precise motion in polar coordinates. Its core advantages lie in:

1. High precision positioning: driven by a closed-loop stepper motor or servo motor, coupled with a high-resolution encoder, the positioning repeatability can reach ± 1 μ m, ensuring absolute consistency of each measurement point. For example, on the surface of an 8-inch wafer, the platform can be accurately positioned to a small area at the edge of 50 μ m, avoiding thickness misjudgment caused by positioning deviation.

2. Global coverage capability: Through the 360 ° rotation of the Theta axis and linear scaling of the R axis, the platform can cover all areas of circular, ring-shaped, or irregular substrates. Taking photovoltaic cell coating as an example, it can scan 121 points of a 200mm diameter solar cell within 2 minutes, generate a thickness distribution heatmap, and intuitively expose the problem of uneven coating.

3. Dynamic adaptability: Supports custom scanning paths and point densities, and users can set sparse sampling (fast screening) or dense sampling (defect analysis) according to process requirements. For example, in semiconductor photoresist coating detection, the platform can prioritize scanning the wafer edge and central area to capture the sudden changes in coating thickness in a targeted manner.

　　2、 Automated measurement: a dual leap in efficiency and accuracy

Traditional measurement requires manual movement of the probe or sample, while the integration of the electric R-Theta platform with the thin film thickness measuring instrument achieves full automation of the "positioning measurement recording" process

1. Software collaborative control: By presetting the measurement point coordinates through the upper computer software, the platform automatically plans the optimal path to avoid mechanical collisions. During measurement, the probe is stationary at the target point, and the instrument synchronously collects spectral or ellipsoidal data, reducing the single point measurement time to 0.5 seconds.

2. Real time data mapping: The measurement results are automatically associated with the platform coordinate system to generate 2D/3D thickness distribution models. For example, in MEMS sensor manufacturing, the system can clearly display the thickness gradient of polymer coatings on curved substrates, providing a quantitative basis for optimizing process parameters.

3. Unmanned operation: Supports batch task import and automatic execution at night. The daily detection volume of a single device can reach over 2000 points, which is more than 10 times more efficient than manual operation and reduces the risk of operators being exposed to laser or chemical environments.

　　3、 Industry application: all-around penetration from laboratory to production line

The electric R-Theta platform thin film thickness measuring instrument has been widely used in multiple fields:

1. Semiconductor: Monitor the nanoscale thickness of the oxide layer and silicon nitride hard mask on the wafer surface to ensure the accuracy of photolithography pattern transfer.

2. Display panel: Analyze the uniformity of the organic layer deposited on OLED, optimize the deposition rate and angle control.

3. New energy: Mapping the thickness of lithium battery separator coatings to balance ion conductivity and mechanical strength.

4. Optical coating: Control the wavelength sensitivity of the anti reflective film on the surface of the laser crystal to improve the utilization efficiency of light energy.

With the maturity of Industry 4.0 and intelligent manufacturing, the electric R-Theta platform is deeply integrated with AI vision and big data analysis. In the future, it will achieve adaptive scanning path planning and real-time process feedback, promoting film quality control towards the goal of "zero problems". From micro nano to macro industry, this technological combination is redefining the boundaries of precision measurement.