MSDS File
Product Overview
Aluminum Copper Evaporation Materials (Al/Cu) 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
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Purity | 99.99% – 99.999% | High purity ensures reliable electronic performance |
| Composition | Al with 0.5 – 4 wt% Cu | Improves electromigration resistance |
| Form | Pellets / Granules / Tablets / Wire | Compatible with evaporation sources |
| Particle Size | 1 – 6 mm typical | Supports stable evaporation rates |
| Density | High-density alloy material | Ensures uniform evaporation behavior |
| Deposition Method | E-beam evaporation / Thermal evaporation | Suitable for PVD thin film deposition |
| Material | Key Advantage | Typical Application |
|---|---|---|
| Aluminum Copper (Al/Cu) | Improved electromigration resistance compared with pure Al | Semiconductor interconnect layers |
| Aluminum (Al) | Excellent electrical conductivity and low density | Metallization layers in electronics |
| Copper (Cu) | Very high conductivity and thermal performance | Advanced semiconductor interconnects |
| Question | Answer |
|---|---|
| What forms are available for Al/Cu evaporation materials? | They are typically supplied as pellets, granules, tablets, wire, or custom pieces depending on the evaporation system. |
| What copper concentration is commonly used? | Typical compositions contain 0.5–4 wt% copper, depending on the required reliability and conductivity. |
| Which deposition methods are suitable for Al/Cu materials? | Aluminum copper alloys are commonly used in electron beam evaporation and thermal evaporation systems. |
| What substrates are suitable for Al/Cu thin films? | Films can be deposited on silicon wafers, glass, ceramic substrates, and other electronic materials. |
| Why add copper to aluminum in semiconductor metallization? | Copper improves resistance to electromigration and enhances the reliability of aluminum interconnects. |
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 Copper 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 Copper 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 Copper 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 Copper?
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 Copper 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 Copper 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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