Product Overview
Gold Palladium Sputtering Target (Au/Pd) 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 | Au/Pd (e.g., 60/40, 80/20 wt%) | Controls film conductivity and morphology |
| Purity | ≥ 99.95% | Ensures high film quality and low contamination |
| Density | ≥ 99% theoretical | Improves sputtering stability and lifetime |
| Diameter | 25 – 200 mm (custom available) | Fits standard sputtering systems |
| Thickness | 2 – 6 mm | Affects deposition rate and target life |
| Bonding | Cu backing / Indium bonding | Enhances heat dissipation and stability |
| Grain Structure | Fine and homogeneous | Ensures smooth, defect-free coatings |
| Material | Key Advantage | Typical Application |
|---|---|---|
| Gold Palladium (Au/Pd) | Fine grain, durable, stable films | SEM coatings, sensors |
| Gold (Au) | Highest conductivity | Microelectronics, bonding layers |
| Palladium (Pd) | Higher hardness, catalytic activity | Sensors, catalytic coatings |
| Question | Answer |
|---|---|
| Can Au/Pd sputtering targets be customized? | Yes, composition ratio, dimensions, and bonding methods can all be tailored. |
| Why is Au/Pd preferred for SEM coatings? | It produces ultra-fine grain films that reduce charging and improve imaging clarity. |
| What sputtering method is suitable? | DC magnetron sputtering is commonly used due to the metallic nature of the alloy. |
| Are bonded targets necessary? | For high-power or precision applications, bonded targets are recommended for better heat management. |
| What industries use Au/Pd targets most? | Electronics, microscopy, sensor development, and advanced research laboratories. |
Typical Thin-Film Applications
- Gold Palladium 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 Gold Palladium 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 Gold Palladium 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 Gold Palladium 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 Gold Palladium 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 Gold Palladium?
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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