Bismuth Telluride (Bi₂Te₃) Sputtering Targets
Purity: 99.999% Size: 3” Thickness: 0.250”
Sputtering is a reliable technique for depositing thin films from diverse materials onto substrates of various shapes and sizes. This process is repeatable and scalable, suitable for both small research projects and medium-to-large production batches. Chemical reactions may occur on the target surface, in-flight, or on the substrate, depending on process parameters. Despite its complexity, sputter deposition allows precise control over film growth and microstructure.
Applications of Sputtering Targets
-
Thin Film Deposition: Material is eroded from the target and deposited onto substrates such as silicon wafers.
-
Semiconductor Etching: Sputter etching provides high anisotropy when selectivity is not critical.
-
Analytical Applications: Secondary ion mass spectrometry (SIMS) uses sputtering to measure atom concentrations and detect trace impurities.
-
Space Applications: Sputtering contributes to space weathering, altering physical and chemical properties of airless bodies like asteroids and the Moon.
Bismuth Telluride in Thin Films
Bismuth telluride (Bi₂Te₃) is a gray semiconductor compound of bismuth and tellurium. When alloyed with antimony or selenium, it becomes an efficient thermoelectric material for refrigeration or portable power generation. Bi₂Te₃ is also a topological insulator, showing thickness-dependent physical properties.
-
Thermoelectric Devices: Widely used in bulk thermoelectric devices operating near ambient temperature.
-
Thin Film Applications: Nanostructured Bi₂Te₃ thin films are promising for chip-scale micro-coolers and flexible micro-power generators.
-
Enhanced Performance: Advances in nanotechnology have improved thermoelectric efficiency, particularly in well-ordered thin films.
-
Research Considerations: Composition, microstructure, morphology, thickness, stress-strain, and substrate conditions significantly influence thermoelectric properties.
