Czochralski method

chemistry

Also known as: crystal-pulling method

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June 17, 2026

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The Czochralski method is a technique used for growing large, pure crystals, particularly silicon, which is essential for semiconductors and computer chips. Invented in 1918 by Jan Czochralski, this crystal pulling process involves a seed crystal that is barely in contact with the surface of a molten material. As the seed crystal is slowly pulled upwards, a larger crystal grows beneath it at the interface between the crystal and the melt.12

This method is favored for its cost-effectiveness in producing substantial amounts of pure crystal. The process often includes slow rotation of the crystal to ensure uniformity and prevent the replication of inhomogeneities from the melt. The Czochralski method is also used for growing other types of crystals, such as synthetic sapphire.2

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integrated circuit
Making a base wafer
…is now known as the Czochralski method. To create a single crystal of silicon by using the Czochralski method, electronic-grade silicon (refined to less than one part impurity in 100 billion) is heated to about 1,500 °C (2,700 °F) in a fused quartz crucible. Either an electron-donating element such as…
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…is now known as the Czochralski method. To create a single crystal of silicon by using the Czochralski method, electronic-grade silicon (refined to less than one part impurity in 100 billion) is heated to about 1,500 °C (2,700 °F) in a fused quartz crucible. Either an electron-donating element such as…
Read More

crystal
Growth from the melt
…1918 by the Polish scientist Jan Czochralski and called crystal pulling. One attaches a seed crystal to the bottom of a vertical arm such that the seed is barely in contact with the material at the surface of the melt. A modern Czochralski apparatus is shown in Figure 7A. The…
Read More
…1918 by the Polish scientist Jan Czochralski and called crystal pulling. One attaches a seed crystal to the bottom of a vertical arm such that the seed is barely in contact with the material at the surface of the melt. A modern Czochralski apparatus is shown in Figure 7A. The…
Read More

materials science
Photovoltaics
Known as the Czochralski process, this resulted in a high-purity, single-crystal ingot that was then sliced into wafers about 1 millimetre (0.04 inch) thick. Each wafer’s surface was then “doped” with impurities to create p-type and n-type materials with a junction between them. Metal was then deposited to…
Read More
Known as the Czochralski process, this resulted in a high-purity, single-crystal ingot that was then sliced into wafers about 1 millimetre (0.04 inch) thick. Each wafer’s surface was then “doped” with impurities to create p-type and n-type materials with a junction between them. Metal was then deposited to…
Read More