Our graphite products are widely used in the polycrystalline silicon manufacturing process—one of the processes used to manufacture the photovoltaic cells in solar panels.

When manufacturing the silicon ingots used to form these photovoltaic cells, the melting temperature is extremely high at approximately 1,500°C. Isotropic graphite—which has excellent thermal durability—is therefore extensively employed in rectangular crucibles, heaters, protective covers for insulation, and other components used in casting furnaces.

Larger ingot sizes are also being developed with the aim of improving production efficiency and reducing costs.

To respond to such size increases, we can design lighter furnaces using isotropic graphite materials and C/C composites, and can also propose optimal shapes to extend product life using our analytical technologies.

Our ultra-high-purity graphite products are extensively used in reactors and converters in the manufacturing process for high-purity polysilicon, the raw material of the silicon wafers used in semiconductors and photovoltaic cells.

Graphite’s high purity and excellent electrical conductivity are used to advantage in seed chucks, which come into direct contact with the silicon seed, and components for use in furnace interiors.

We supply a wide range of grades and can select the ideal material to match a variety of requests such as those for quality improvements and cost reductions.