In the photovoltaic industry, 3D Confocal Microscope have multiple functions such as measuring grid lines and textured pyramids. In this issue of Millennial Solar, we will introduce the application knowledge of 3D microscopes in the photovoltaic industry.

Grid line measurement function

1. Height, width and aspect ratio of grid lines

2. Automatically circle the edge of the grid line and calculate the area, volume of the grid line, the volume of the slurry and other values.

3. There are up to 12 cross-section lines in a single field of view, and the average value is taken.

Pyramid measurement function

 Detect the 2D/3D image of the textured surface, automatically count the number of grains per unit area, and mark the grain position with a cross symbol on the view.

3D Confocal Microscope

The 3D Confocal Microscope ME-PT3000 is a high-speed confocal scanning microscope for accurate and reliable 3-dimensional (3D) measurements. Real-time confocal microscopy images are achieved through fast optical scanning modules and signal processing algorithms.

ME-PT3000 is an optical instrument specially used in the photovoltaic industry to inspect the quality of grid lines and textures on the surface of photovoltaic cells. Based on the principle of optical technology, combined with precision Z-direction scanning module, 3D modeling algorithm, etc., the device surface is non-contactly scanned and a 3D image of the surface is established. The height and width of the grid lines on the photovoltaic cells and the texture on the surface are measured through the system software. The number of pyramids is quantitatively tested to provide feedback on the quality of photovoltaic cell cleaning, texturing and screen printing processes.

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Other functions

1. Pad point: Calculate the metallization area.

2. Back electrode: Observe whether the printing of the aluminum electrode on the back is uniform and defective, determine the consumption of printing silver paste, and control production costs.

3. Pad polished silicon wafer: observe the damaged layer of the polished silicon wafer during the manufacturing process to optimize the manufacturing process.

4. PR groove: Improve module efficiency and reduce the risk of cell chip splintering and cost.

5. Laser scribing: Observe the image of burrs or residue on the cutting edge to improve the cutting process and save costs.

3D Confocal Microscope is a very mainstream testing equipment in cell production. It is used in heterojunction, perovskite or other cell processes. But different devices have different performance parameters. Millennial Solar will also bring you a variety of product sharing.