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VD0575 Selenium Evaporation Materials, Se

Material Type: Selenium
Symbol: Se
Purity: 99.9% ~ 99.999%
Shape: Powder/ Granule/ Pellets / Custom-made

TFM is a top manufacturer and supplier of high-purity selenium evaporation materials, as well as a diverse range of other evaporation materials. We provide these materials in both powder and granule forms, with custom options available to meet specific requirements upon request.

MSDS File

Selenium Evaporation Material Description

Selenium, represented by the chemical symbol Se, is a non-metallic element found in the fourth period and group VI A (the 34th element) of the periodic table. It serves various purposes, including as a photosensitive material, a catalyst in the electrolytic manganese industry, and an essential nutrient for animals and plants. Selenium also functions as a semiconductor and is widely used in photocells.

High-purity selenium evaporation materials are essential for producing high-quality deposited films in various deposition processes. TFM specializes in manufacturing these materials with purities up to 99.999%, ensuring product reliability through stringent quality assurance procedures.

selenium evaporation materials

Selenium Evaporation Material Specification

Material TypeSelenium
SymbolSe
Color/AppearanceGray, Metallic Luster, Non-Metallic
Melting Point217 °C
Density4.79 g/cm3
Thermal Conductivity0.00519 W·m-1·K-1 (25°C)
Thermal Expansion37 µm/(m·K) (25°C)
SynonymsSe Pellets, Se Pieces, Se Evaporation Pellet, Selenium Pellets, Selenium Pieces, Selenium Evaporation Pellet

Selenium Evaporation Material Application

  • Employed in deposition processes such as semiconductor deposition, chemical vapor deposition (CVD), and physical vapor deposition (PVD).
  • Used in optics for various applications, including enhancing wear protection, creating decorative coatings, and advancing display technologies.

Selenium Evaporation Material Packaging

We handle our selenium evaporation materials with the utmost care to avoid any damage during storage and transportation. This meticulous approach ensures that the quality of our products is maintained in their original condition.

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TFM offers selenium evaporation materials in a variety of forms, purities, sizes, and price points. We specialize in high-purity e-beam evaporation materials, designed for optimal density and minimal average grain sizes. For up-to-date pricing on evaporation pellets and other deposition materials not listed, please contact us directly.

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FAQ

  • They are high‐purity substances (e.g. metals, alloys, or compounds) used in thermal or electron‐beam evaporation processes to form thin films on substrates.

  • Typically, they’re processed into a form (often ingots, pellets, or wires) that can be efficiently vaporized. Preparation emphasizes high purity and controlled composition to ensure film quality.

  • Thermal evaporation and electron-beam (e-beam) evaporation are the two main techniques, where material is heated (or bombarded with electrons) until it vaporizes and then condenses on the substrate.

  • Thermal evaporation heats the material directly (often using a resistive heater), while e-beam evaporation uses a focused electron beam to locally heat and vaporize the source material—each method offering different control and energy efficiency.

  • Key parameters include source temperature, vacuum level, deposition rate, substrate temperature, and the distance between the source and the substrate. These factors influence film uniformity, adhesion, and microstructure.

  • Evaporation generally produces high-purity films with excellent control over thickness, and it is especially suitable for materials with relatively low melting points or high vapor pressures.

  • Challenges include issues with step coverage (due to line-of-sight deposition), shadowing effects on complex topographies, and possible re-evaporation of material from the substrate if temperature isn’t properly controlled.

  • Common evaporation materials include noble metals (e.g., gold, silver), semiconductors (e.g., silicon, germanium), metal oxides, and organic compounds—each chosen for its specific optical, electrical, or mechanical properties.

  • Selection depends on desired film properties (conductivity, optical transparency, adhesion), compatibility with the evaporation process, and the final device application (semiconductor, optical coating, etc.).

  • Optimizing substrate temperature, deposition rate, and chamber vacuum are critical for ensuring that the film adheres well and forms the intended microstructure without defects.

  • Troubleshooting may involve checking the source material’s purity, ensuring stable source temperature, verifying the vacuum level, adjusting the substrate’s position or temperature, and monitoring deposition rate fluctuations.

While evaporation tends to yield very high purity films with excellent thickness control, it is limited by its line-of-sight nature. In contrast, sputtering can deposit films more uniformly on complex surfaces and is more versatile for a broader range of materials.

 

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