Researchers Use InSb Substrates
Indium Antimonide (InSb) substrates are used by researchers studying infrared detectors, magnetic sensors, solid state physics, high-speed electronics, and III-V semiconductor materials. InSb wafers are available in different diameters, orientations, dopant types, thicknesses, and polish options for both research and device development.
Example InSb Wafer Request
A graduate research assistant requested price quotes for InSb and CdTe wafers in both (100) and (111) orientations. The researcher needed 3" wafers, 2" wafers, and 1cm x 1cm pieces when available. Since the wafers were not being used for device fabrication, the lowest-cost available substrate was acceptable.
Requested material: 2" InSb (111)-A wafer
UniversityWafer, Inc. quoted:
DW99b: Indium Antimonide wafers, P/E 2" diameter x 500±25 µm, n-type InSb:Te [111A] ±0.5°, one-side-polished, back-side matte etched, EJ flats, sealed under nitrogen in single wafer cassette.
Reference #197392 for specs and pricing.
Get Your InSb Substrate Quote FAST! Or, Buy InSb Wafers Online and Start Researching Today!
What Are Indium Antimonide (InSb) Substrates?
Indium Antimonide is a III-V compound semiconductor made from indium and antimony. InSb is known for its narrow bandgap, very high electron mobility, low electron effective mass, strong infrared absorption, and sensitivity to magnetic fields. These properties make InSb useful for advanced electronic, optoelectronic, magnetic, and quantum research.
Key Properties of InSb Substrates
- Material: Indium Antimonide, also written as InSb
- Semiconductor type: III-V narrow bandgap semiconductor
- Applications: Infrared detectors, Hall sensors, quantum devices, and high-speed electronics
- Available orientations: Common options include <100> and <111>
- Doping: Available as n-type, p-type, or undoped depending on stock and requirements
- Polish: Single-side polished or double-side polished options may be available
What Are InSb Substrates Used For?
InSb wafers are commonly used in mid-wave infrared detector research, magnetic sensor testing, Hall-effect devices, spintronic studies, terahertz applications, and epitaxial growth of related III-V materials. Researchers also use InSb substrates in solid state physics experiments where carrier mobility, crystal orientation, and surface quality are important.
InSb Wafer Options
UniversityWafer, Inc. can help researchers source Indium Antimonide wafers by diameter, thickness, orientation, dopant, carrier concentration, mobility, polish, and crystal quality. Please include your desired specifications and quantity when requesting a quote.
InSb Wafers for Radiation and Semiconductor Research
Indium Antimonide (InSb) wafers are used in radiation experiments, solid state physics, infrared detector research, Hall-effect devices, and advanced III-V semiconductor studies. Because InSb is a narrow bandgap compound semiconductor, researchers often compare it with silicon, germanium, GaAs, and InAs for bandgap, mobility, radiation response, and surface defect studies.
UniversityWafer, Inc. supplies InSb substrates for universities, national labs, and R&D groups that need small pieces, scrap wafers, full wafers, prime-grade substrates, or epi-ready wafers. Researchers can request different wafer sizes, orientations, thicknesses, dopants, polish types, and crystal quality requirements.
InSb Scrap Substrates for Radiation Experiments
A nuclear engineering graduate student requested semiconductor materials for intense radiation exposure testing. The research involved studying how different materials respond to radiation based on bandgap, ionization energy, surface defects, and material type.
The student was interested in small pieces of semiconductor substrates approximately 1 cm or larger, including:
- Silicon (Si)
- Germanium (Ge)
- Gallium Arsenide (GaAs)
- Indium Antimonide (InSb)
- Indium Arsenide (InAs)
For experiments where the wafer will be destroyed during testing, researchers may request lower-cost scrap pieces, broken wafers, diced substrates, or non-prime semiconductor materials. Availability depends on current stock and material type.
Reference #213033 for related specs and pricing.
InSb Wafers for Solid State Physics Research
InSb substrates are also used in solid state physics laboratories where high crystal quality, clean polishing, and controlled electrical properties are important. Premium-quality InSb wafers are often requested for quantum transport studies, infrared device development, magnetoresistance testing, and epitaxial growth.
Example Prime InSb Wafer Request
A solid state physics researcher requested the following InSb substrate specifications:
- Material: Indium Antimonide (InSb)
- Grade: Prime
- Orientation: (100)
- Diameter: 2"
- Thickness: 0.500 mm
- Polish: Double-side epi polished
- Quantity: 3 wafers
Example Quoted InSb Wafer Specifications
EH50: Indium Antimonide wafers, P/P 2" diameter × 450±25 µm, LEC p-type InSb:Ge [100] ±0.5°, Ro = 0.734 Ohm-cm, Nc > 1.35E15/cc, mobility = 6,300 cm²/Vs, EPD <200/cm², both-sides-polished, sealed under nitrogen in single wafer cassette.
EH50b: Indium Antimonide wafers, P/P 2" diameter × 500±25 µm, LEC p-type InSb:Ge [100] ±0.5°, Ro = 0.734 Ohm-cm, Nc > 1.35E15/cc, mobility = 6,300 cm²/Vs, EPD <200/cm², both-sides-polished, sealed under nitrogen in single wafer cassette.
Important InSb Wafer Quality Factors
The quality of an InSb wafer is determined by crystal purity, electrical properties, orientation accuracy, thickness tolerance, surface roughness, cleanliness, and defect density. For epi-ready wafers, researchers often evaluate etch pit density (EPD), total thickness variation (TTV), surface cleanliness, and polish quality before using the substrate for epitaxial growth.
Because InSb has strong temperature-dependent electrical behavior, carrier concentration and mobility may be measured at liquid nitrogen temperature. This is important for researchers comparing room-temperature and low-temperature InSb performance in solid state physics and detector experiments.