Tungsten Crucible for Electronics Industry
The electronics industry encompasses LED technology, display technologies, and semiconductor manufacturing, all of which involve various high-temperature processes. The applications of tungsten crucible in this industry include:
1.Sapphire Crystal Growth: Sapphire crystals are used as substrates for LEDs and optical windows, grown using the Kyropoulos method. Tungsten crucibles are crucial in this process, as their smooth surface ensures crystal extraction without damage, reducing cracks and defects. For instance, in LED manufacturing, the quality of the sapphire substrate directly affects the performance of the devices. Tungsten crucibles' high purity and stability ensure the optical properties of the crystal.
2.Rare Earth Metal Melting: Rare earth metals (such as neodymium and europium) are used in magnets and phosphors. Tungsten crucibles are used to melt these metals due to their high-temperature capabilities and low contamination risk. For example, tungsten crucibles are used to melt neodymium, which is used in the production of NdFeB magnets for hard disk drives.
3.Physical Vapor Deposition (PVD) Process: In electron beam evaporation, tungsten crucibles hold the material to be evaporated, ensuring uniform deposition. This is ideal for the production of high-precision electronic components. For example, in semiconductor manufacturing, PVD is used to deposit metal films, and the low vapor pressure of tungsten crucibles helps prevent contamination.
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