10m span ±1μm flatness! How does the ZHHIMG granite platform achieve this?

In the coating process of perovskite solar cells, achieving ±1μm flatness over a 10-meter span is a major challenge in the industry. ZHHIMG granite platforms, leveraging the natural advantages of granite and cutting-edge technology, have successfully overcome this challenge and become a benchmark for high-precision manufacturing.

Granite is inherently superior, laying the foundation of precision
ZHHIMG carefully selects high-quality granite, whose coefficient of thermal expansion is only 0.6-5×10⁻⁶/℃, less than 1/5 of that of metal materials. Even when the temperature changes dramatically, the dimensional deformation can be controlled within a very small range. Meanwhile, granite is composed of mineral crystals such as quartz and feldspar, which are closely bonded through strong chemical bonds. It has high hardness and strong wear resistance, and can easily withstand mechanical pressure and friction during the coating process, continuously ensuring the flatness of the platform and laying a solid material foundation for high-precision coating.

With the support of innovative processes, the precision limit is broken through
Adopting ultra-precision grinding and polishing technology, from rough grinding to nano-level polishing, the platform surface is gradually ground to a mirror-like smoothness. In combination with five-axis linkage CNC machining, the shape and functional structure of the platform are precisely controlled at the micron level to ensure that the dimensions are exactly the same. Supplemented by a laser interferometer nanoscale detection and closed-loop calibration system, repeated measurement and correction are carried out to stably maintain the flatness within ±1μm.

Structural optimization design ensures stability and protection
For a 10-meter long span, the rib plate layout is optimized through finite element analysis to enhance the rigidity of the platform. The bottom is equipped with high-performance shock absorbers and vibration isolation pads to isolate the equipment from environmental vibrations. Multiple designs ensure that the platform remains as stable as a mountain even under complex working conditions, safeguarding high precision.

Taking the natural advantages of granite as the core, ZHHIMG combines cutting-edge technology and innovative design to create a customized platform that meets the high-precision coating requirements of perovskite solar cells, helping the industry reach new heights.