Why Choose Tungsten Crucibles for E-Beam Evaporation？

Electron beam evaporation (E-beam evaporation) is a crucial coating method widely used in optical coating, semiconductor manufacturing, and advanced materials. In a high-vacuum environment, an electron beam emitted from an electron gun is focused onto the target material, causing it to rapidly heat, melt, and evaporate locally. The vapor atoms condense on the substrate surface to form a uniform thin film.

While the electron beam is the core energy source in the entire process, the crucible is the key component that holds and supports the evaporated material. The choice of crucible material directly affects the purity, stability, and evaporation efficiency of the thin film.

Tungsten possesses an ultra-high melting point (3410°C) and remains stable even at extremely high temperatures, without deformation. It maintains structural integrity in vacuum and high temperatures and is resistant to reaction with molten metal, preventing film contamination, making it the preferred material for crucible manufacturing.

Choosing a tungsten crucible for electron beam evaporation offers the following significant advantages:

Higher film purity: Tungsten's inertness ensures the evaporation process is free from chemical contamination, guaranteeing a clean coating.

Long service life: Strong resistance to corrosion, oxidation, and thermal shock, allowing for repeated use.

Wide range of applicable materials: Suitable for various high-melting-point metals such as titanium (Ti), chromium (Cr), molybdenum (Mo), tantalum (Ta), gold (Au), and silver (Ag).

Good thermal stability: Maintains shape and performance stability even under repeated heating and cooling.

High evaporation efficiency: Excellent thermal conductivity ensures more uniform evaporation and improves deposition rate.

Jinxin has been dedicated to the cemented carbide industry for 16 years. Choosing tungsten crucibles for your production is a wise choice. If you need to learn more about tungsten crucibles, please feel free to contact us; we will provide you with suitable products.