Product Overview
Bismuth Telluride Selenide N-Type Sputtering Target (Bi2Te2.7Se0.3) is a chalcogenide sputtering target intended for composition-sensitive thin-film deposition. For sulfur-, selenium-, or tellurium-containing materials, the target chemistry is only the starting point: sputtering yield differences, substrate temperature, gas pressure, and volatile-component loss can shift the deposited-film composition relative to the nominal target composition.
Material and Deposition Characteristics
These targets are commonly treated as mechanically brittle and composition-sensitive sputtering materials. RF sputtering is often considered when target conductivity is limited. Power density, substrate temperature, and working pressure should be controlled conservatively, and the deposited film composition should be verified when precise sulfur, selenium, or tellurium stoichiometry is required.
Technical Data
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Purity | 99.9% – 99.999% | Higher purity improves electrical properties and film reproducibility |
| Composition | Bi₂Te₂.₇Se₀.₃ (N-type) | Provides optimized carrier concentration |
| Diameter | 25 – 300 mm (custom) | Compatible with standard sputtering systems |
| Thickness | 3 – 6 mm | Influences sputtering stability and target lifetime |
| Density | ≥ 95% theoretical | Ensures uniform erosion and film consistency |
| Bonding | Indium / Elastomer / Copper backing | Enhances thermal conductivity and prevents cracking |
| Material | Key Advantage | Typical Application |
|---|---|---|
| Bi₂Te₂.₇Se₀.₃ (N-type) | High Seebeck coefficient and optimized electron concentration | Thermoelectric cooling thin films |
| Bi₀.₅Sb₁.₅Te₃ (P-type) | High performance for complementary P-leg | Complete thermoelectric modules |
| Bi₂Te₃ | Lower cost & widely used baseline TE material | General thermoelectric R&D |
| Question | Answer |
|---|---|
| Can the target be customized? | Yes. Purity, diameter, thickness, and bonding can be tailored to your deposition system. |
| What is the packaging method? | Vacuum-sealed, anti-shock foam protected, shipped in export-grade cartons or wooden crates. |
| Is bonding necessary? | Recommended for large-diameter targets to improve heat dissipation and prevent cracking. |
| What deposition systems are compatible? | DC/RF magnetron sputtering systems used in semiconductor and thermoelectric research. |
| Does the element ratio affect film properties? | Yes, the Bi–Te–Se ratio directly determines carrier type, concentration, and thermoelectric efficiency. |
Typical Thin-Film Applications
- Chalcogenide thin films for optical, infrared, electronic, thermoelectric, and phase-change research
- Compound semiconductor layers and advanced-material thin-film studies
- Projects where composition retention and controlled sputtering of brittle materials are important
Target Configuration and Ordering Considerations
When requesting a quotation, provide target diameter or rectangular dimensions, thickness, purity or composition, required quantity, and whether a backing plate or bonded assembly is needed. For brittle ceramic or compound targets, it is useful to specify the cathode model, backing-plate material, preferred bonding method, operating power if known, and any density, tolerance, or inspection-document requirements. TFM can review drawings, old-target photos, and application details when custom dimensions are required.
Frequently Asked Questions
What sputtering mode is commonly used for Bismuth Telluride Selenide N-Type?
RF magnetron sputtering is often considered when the target conductivity is limited or when more conservative operation is preferred for brittle, composition-sensitive compounds.
Can Bismuth Telluride Selenide N-Type films lose sulfur, selenium, or tellurium during deposition?
Yes. Composition drift can occur because of preferential sputtering, substrate heating, re-sputtering, and volatile-component loss. Film composition should be checked when stoichiometry is important.
Why is bonding important for a Bismuth Telluride Selenide N-Type target?
Many chalcogenide targets are brittle and have modest thermal conductivity. A suitable backing plate and bonding layer can improve mechanical support and heat transfer during sputtering.
Does the target composition guarantee film stoichiometry for Bi2Te2.7Se0.3?
No. The target composition is the starting source composition, but the deposited film can still shift because of process variables. Film analysis should be used to confirm the final stoichiometry.
What process variables should be monitored when sputtering Bismuth Telluride Selenide N-Type?
Useful variables include power density, working pressure, substrate temperature, cooling, target conditioning, and deposited-film composition. If reactive gas is used, gas ratio should also be controlled carefully.
What should I send TFM for a custom Bismuth Telluride Selenide N-Type target?
Please provide composition or formula, purity, dimensions, quantity, backing or bonding details, cathode model, and any film-composition or inspection requirements relevant to your project.
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