Product Overview
Zinc Tin Sputtering Target (Zn/Sn) is an alloy sputtering target used to deposit composition-controlled alloy films. Relative to a pure elemental target, the alloying constituents are introduced to tune electrical, magnetic, optical, mechanical, or adhesion-related film properties. For this reason, alloy ratio, homogeneity, purity basis, and the intended film composition should be defined clearly in the procurement specification.
Material and Deposition Characteristics
Many alloy targets are electrically conductive and can be compatible with DC or pulsed-DC magnetron sputtering, subject to the actual alloy composition and equipment capability. The target composition is not always reproduced exactly in the deposited film because preferential sputtering, re-sputtering, substrate heating, and process gas conditions can shift the final ratio. For composition-sensitive work, deposited-film analysis should be part of process qualification.
Technical Data
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Composition | Zn/Sn (custom atomic ratios) | Controls electrical & optical properties |
| Purity | 99.9% – 99.99% | Reduces impurities and defects |
| Diameter | 25 – 300 mm (custom) | Fits standard sputtering cathodes |
| Thickness | 3 – 6 mm (typical) | Influences target lifetime |
| Density | ≥ 95% of theoretical | Ensures stable sputtering |
| Sputtering Mode | DC / Reactive DC | Suitable for metallic alloy targets |
| Bonding | Copper / Titanium backing (optional) | Improves heat dissipation |
| Material | Key Advantage | Typical Application |
|---|---|---|
| Zn/Sn | Tunable composition, stable sputtering | ZTO and oxide electronics |
| Zn | High transparency (as oxide) | Transparent coatings |
| Sn | Good conductivity | Functional metal films |
| In-based alloys | High performance, higher cost | Advanced TCOs |
| Question | Answer |
|---|---|
| Can the Zn/Sn ratio be customized? | Yes, atomic or weight ratios can be tailored to your process. |
| Is DC sputtering suitable? | Yes, Zn/Sn alloy targets are conductive and ideal for DC sputtering. |
| Can these targets be used for oxide films? | Yes, reactive sputtering with oxygen is commonly used to form ZTO films. |
| How are the targets packaged? | Vacuum-sealed with protective cushioning for safe transport. |
Typical Thin-Film Applications
- Zinc Tin alloy films where composition control is important to electrical, mechanical, magnetic, or optical performance
- Multilayer stacks, adhesion/barrier layers, conductive films, or functional coatings depending on the alloy system
- Research and production programs that require customized alloy ratios and repeatable sputtering behavior
Target Configuration and Ordering Considerations
For quotation and manufacturability review, provide target size, thickness, purity or alloy composition, quantity, and the sputtering gun or cathode model if known. If a bonded assembly is required, include backing-plate material, bonding preference, and any dimensional tolerances, surface-finish needs, or inspection-document requirements. TFM can also review customer drawings or old-target samples for replacement builds.
Frequently Asked Questions
Can the composition of a Zinc Tin sputtering target be customized?
Yes. For alloy targets, the required ratio should be specified clearly in wt% or at%. TFM can review custom compositions together with purity, dimensions, and manufacturability.
Will an alloy target always produce a film with the same composition?
Not necessarily. Preferential sputtering, substrate heating, process gas, and re-sputtering effects can shift the deposited composition relative to the nominal target chemistry. Film analysis should be used when the composition is critical.
Is a Zinc Tin alloy target compatible with DC magnetron sputtering?
Many metallic alloy targets are electrically conductive and can be compatible with DC or pulsed-DC sputtering, but the final choice depends on the actual alloy system and equipment.
Why is alloy homogeneity important in a Zinc Tin target?
A uniform alloy distribution helps support stable erosion and reduces local composition variation across the target, which in turn helps improve run-to-run consistency.
Can a Zinc Tin target be supplied bonded?
Yes. Where the cathode or thermal load requires it, TFM can supply bonded assemblies. Backing-plate material, target thickness, bonding method, and operating power should be reviewed together.
What should I include in an RFQ for Zinc Tin?
Specify the alloy composition, purity basis, dimensions, quantity, backing requirement, cathode model or drawing, and any tolerance, inspection, or documentation requirements.
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