Quartz Crucibles by Semicorex: Essential for Silicon Pulling

Our quartz crucibles are indispensable for extracting single-crystal silicon through the Czochralski (CZ) process and for the development of large-scale integrated circuits, as well as for fabricating advanced solar cells.

Quartz crucibles are critical for growing single-crystal silicon. The process begins by filling the quartz crucible with high-purity polycrystalline silicon. This material is then heated to approximately 1500°C, where it melts and can be drawn into single crystals using a pulling device. This high-temperature resistance and excellent heat preservation properties of the quartz crucible ensure the integrity and quality of the silicon crystal.

Types of Quartz Crucibles

Arc Quartz Crucibles: Primarily used for the Czochralski method to produce monocrystalline silicon. These crucibles are designed to withstand the stringent conditions required for growing single crystals.

Quartz Ceramic Crucibles: Mainly utilized for producing polycrystalline silicon ingots. These crucibles offer excellent durability and thermal properties suited for the casting and solidification processes involved in polycrystalline silicon production.

Detailed Production Process by Semicorex

Mold Filling: Quartz powder is filled into a mold, with natural quartz powder forming the outer layer and higher purity synthetic silica glass powder forming the inner layer, creating a robust two-layer structure.

Melting and Vitrification: The quartz powder is subjected to high temperatures, causing it to melt and vitrify, forming a solid, glass-like structure.

Finishing: The crucible is then rinsed with high-pressure water to remove any residual quartz powder from the outer surface. The rim is trimmed to the specified height, and further washing ensures cleanliness.

Dimensional Inspection: Each crucible undergoes thorough inspection for thickness, weight, and external diameter to ensure it meets precise specifications.

Cleaning: Both the internal and external surfaces are cleaned with acid, followed by a rinse with pure water and thorough drying to remove any impurities.

Customization and Technical Capabilities

Semicorex offers a diverse range of quartz crucible solutions tailored to various needs. We provide options that include different types of raw material powders, a variety of melting conditions, and multiple finishing methods. Our crucibles are known for their high purity and durability, which is crucial since they come into direct contact with raw materials used in semiconductor devices. We understand that the purity and bubble level of the transparent layer can be critical, and we offer precise control over these parameters based on the intended application. Furthermore, Semicorex possesses the technical expertise to manufacture large-size quartz crucibles with high precision, customized according to customer requirements.