Bismuth Oxide (Bi₂O₃) Sputtering Targets, Indium
Purity: 99.9% Size: 4” Thickness: 0.125”
Sputtering is a reliable and scalable technique for depositing thin films from a variety of materials onto substrates of different shapes and sizes. The process allows precise control over film growth and microstructure. Chemical reactions can occur on the target surface, in-flight, or on the substrate depending on process parameters, making sputter deposition suitable for both small R&D projects and medium-to-large production batches.
Applications of Sputtering Targets
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Thin Film Deposition: Transfers material from the target to substrates, such as silicon wafers, forming uniform thin films.
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Semiconductor Etching: Used where high etching anisotropy is required and selectivity is less critical.
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Material Analysis: Enables secondary ion mass spectrometry (SIMS) for compositional analysis and trace impurity detection.
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Space Applications: Sputtering contributes to space weathering, altering the physical and chemical properties of airless bodies like asteroids and the Moon.
Material Overview
Bismuth oxide (Bi₂O₃) is a key bismuth compound extensively studied for its optical and electrical properties, including a large energy gap (2–4 eV), high refractive index, and significant oxygen ion conductivity at medium and high temperatures. These characteristics make it promising for:
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Optoelectronics
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Solar cells
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Solid oxide fuel cells (SOFCs)
Bi₂O₃ exists in several polymorphic forms (α, β, γ, δ), each with unique crystal structures and properties. Only the α-phase (low-temperature monoclinic) and δ-phase (high-temperature face-centered cubic) are stable; others are metastable.
Magnetron sputtering is widely employed due to its high deposition rate, dense and adhesive films, and compatibility with large-area systems. Bi₂O₃-based materials are applied in:
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Electrolytes for SOFCs and oxygen sensors
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Gas sensors and optical coatings
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Ceramic glass production
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Photocatalytic applications under visible light for water splitting and decontamination
Additionally, Bi-containing oxides exhibit high charge carrier mobility and long electron mean free paths, making them suitable for microelectronics. Semi-metallic Bi thin films can transition to semiconductors at thicknesses around 30 nm, enhancing their versatility in advanced materials applications.
