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Aluminum Scandium Evaporation Materials

Aluminum Scandium Evaporation Materials, Al/Sc

Material: Aluminum Scandium (Al/Sc)
Chemical Formula: Al/Sc
Catalog No.: TFM-EVM-0015
Purity: 99.9% ~ 99.95%
Shape: Powder/ Granule/ Custom-made

Aluminum Scandium (Al/Sc) evaporation material is supplied by Thin Film Materials (TFM) for vacuum evaporation and thin-film deposition. Available form, size, purity, and packaging can be customized to suit research and production requirements.

MSDS File

Product Overview

Aluminum Scandium Evaporation Materials (Al/Sc) is an alloy evaporation material intended for depositing multi-element metallic films. Unlike a pure element, an alloy may not evaporate congruently because its constituents can have different vapor pressures. As a result, source composition, evaporation method, deposition rate, and film-composition verification should be considered together; for very composition-sensitive films, co-evaporation from separate sources may be evaluated.

Evaporation Behavior and Process Considerations

Different alloying elements may evaporate at different rates because their vapor pressures are not identical. This can cause the source surface and deposited film to drift away from the nominal alloy composition during a run. For demanding composition control, film analysis, source replenishment strategy, or co-evaporation from separately controlled sources may be more reliable than assuming one alloy charge will evaporate congruently.

Technical Data

ParameterTypical Value / RangeImportance
Purity99.9% – 99.999% (base Al purity)Reduces electronic defects
CompositionCustom Al/Sc ratio (wt% or at%)Controls strength & functional properties
FormPieces / Granules / PelletsCompatible with evaporation sources
Melting BehaviorComposition-dependent (~660°C base Al)Influences evaporation profile
Density≥ 99% theoreticalEnsures stable vaporization
PackagingVacuum-sealed / inert-packedPrevents oxidation
MaterialKey AdvantageTypical Application
Aluminum Scandium (Al/Sc)Grain refinement & enhanced thermal stabilityMEMS & advanced electronics
Pure Aluminum (Al)High conductivity & low densityInterconnect layers
Aluminum Copper (Al/Cu)Improved strength & electromigration resistanceIC metallization
Aluminum Silicon (Al/Si)Good casting and stability characteristicsGeneral coatings
QuestionAnswer
Can the scandium content be customized?Yes, the Sc percentage can be tailored to meet specific electrical or mechanical performance targets.
Is the material supplied pre-alloyed?Yes, standard Al/Sc evaporation materials are pre-alloyed to ensure compositional uniformity.
What deposition methods are suitable?Compatible with thermal and electron beam evaporation systems.
Are custom sizes available?Yes, material form and particle size can be customized based on equipment requirements.
Which industries use Al/Sc films most?Semiconductor manufacturing, MEMS fabrication, RF device development, and advanced materials research.

Typical Thin-Film Applications

  • Composition-tuned alloy films for electrical, magnetic, optical, or mechanical functionality
  • Multilayer and thin-film metallization studies
  • R&D where alloy ratio or co-evaporation strategy is part of the process design

Source Form and Ordering Considerations

For quotation, provide material, purity, source form, particle or piece size, quantity, evaporation method, and any boat, basket, crucible, or e-beam hearth constraints. If the material will be used for a specific coating stack, sharing the intended film thickness or deposition application can help with source-form selection and packaging recommendations.

Frequently Asked Questions

Will Aluminum Scandium evaporate with the same composition as the bulk alloy?

Not necessarily. Alloy constituents can have different vapor pressures, so the vapor and deposited film may become enriched in the more volatile component as evaporation proceeds.

When is co-evaporation preferable to using a Aluminum Scandium alloy source?

Co-evaporation can be preferable when precise film composition must be maintained independently because separate source rates can be controlled and adjusted during deposition.

Can Aluminum Scandium be evaporated by electron beam?

Often yes, especially when the alloy requires high source temperature. The actual behavior depends on melting, segregation, evaporation rate, and whether the constituents remain sufficiently mixed in the melt.

How should film composition be verified for Aluminum Scandium?

For composition-critical films, analytical verification such as EDS, XRF, XPS, or another appropriate method should be used rather than assuming the film exactly matches the source alloy.

What source form is suitable for Aluminum Scandium evaporation?

Pieces, pellets, or granules may be supplied depending on the source holder. A stable charge geometry helps reduce movement and sudden changes in the heated surface.

What should I include in a Aluminum Scandium evaporation-material RFQ?

Specify alloy ratio, purity basis, source form and size, quantity, evaporation method, and the required film-composition tolerance if it is important.

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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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