InSb (Indium Antimonide) Single Crystal Wafers – P-type Ge-doped, LEC-Grown, Orientation

Overview

InSb (Indium Antimonide) single crystal wafers are critical semiconductor substrates widely employed in mid- to long-wave infrared (MWIR–LWIR, 3–12 µm) photodetectors, Hall sensors, magnetoresistive devices, and cryogenic quantum transport studies. This product line consists of high-purity, p-type germanium-doped InSb wafers grown via the Liquid Encapsulated Czochralski (LEC) method—a standard industrial technique for producing low-defect, stoichiometric III–V compound semiconductors under controlled phosphorus or boron oxide encapsulation. The crystallographic orientation (±0.5° tolerance) ensures optimal epitaxial compatibility with common IR detector architectures, including photoconductive and photovoltaic heterostructures. With carrier concentrations tunable between 0.05–0.50 × 10¹⁷ cm⁻³ and electron mobilities exceeding 4.0–8.4 × 10³ cm²/V·s at room temperature, these wafers support high-sensitivity, low-noise device fabrication under both ambient and cryogenic operating conditions.

Key Features

• High-purity, p-type InSb substrate doped with germanium—engineered for stable acceptor activation and uniform dopant distribution
• LEC growth process ensures low dislocation density: etch pit density (EPD) < 200 cm⁻², verified by standard molten KOH etching per ASTM F1722
• Precise crystallographic orientation (±0.5°), certified via X-ray diffraction rocking curve analysis (θ–2θ scan)
• Standard geometry: 50.8 mm (2 inch) diameter × 0.45 mm thickness, with single-side mechanical polish achieving surface roughness < 5 Å RMS (measured by AFM)
• Controlled carrier concentration range: 5 × 10¹⁶–5 × 10¹⁷ cm⁻³, enabling optimization for either high-responsivity photodetection or low-offset Hall sensing
• Processed and packaged in ISO Class 4 (100-level) cleanroom environment; individually sealed in vacuum-packed, static-dissipative 100-class clean bags or rigid wafer cassettes

Sample Compatibility & Compliance

These InSb wafers are compatible with standard III–V semiconductor processing workflows, including thermal evaporation, sputtering, photolithography (i-line and g-line), wet/dry etching (e.g., HCl:H₃PO₄:H₂O), and dielectric passivation (e.g., SiO₂, SiN_x). All wafers undergo full electrical characterization—including Van der Pauw resistivity and Hall effect measurements per ASTM F76—prior to shipment. Certificates of Conformance (CoC) include batch-specific EPD maps, orientation verification reports, and carrier mobility data. Packaging complies with JEDEC J-STD-033 for moisture sensitivity level (MSL) 1 handling, and materials documentation conforms to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006.

Software & Data Management

While the InSb wafers themselves are passive substrates, their metrological traceability is supported through integrated quality management systems compliant with ISO 9001:2015. Batch-level test data—including EPD histograms, XRD full-width-at-half-maximum (FWHM) values, and four-point probe sheet resistance maps—are archived in secure, audit-ready formats. For customers requiring extended traceability in regulated environments (e.g., defense IR systems or medical imaging R&D), optional GLP-aligned documentation packages—including raw measurement logs, equipment calibration certificates (NIST-traceable), and analyst sign-offs—are available upon request. All data files are delivered in CSV and PDF formats, compatible with LIMS integration.

Applications

• Front-side illuminated MWIR photodiodes and focal plane arrays (FPAs) for thermal imaging and spectroscopy
• Low-field Hall sensors used in automotive current monitoring, precision current clamps, and magnetic field mapping systems
• Substrates for molecular beam epitaxy (MBE) and metalorganic chemical vapor deposition (MOCVD) of InSb-based heterostructures (e.g., InAs/InSb superlattices)
• Cryogenic quantum Hall effect and Shubnikov–de Haas oscillation studies below 4 K
• Reference standards in infrared optical testing, particularly for calibrating spectral responsivity of FTIR detectors
• Research platforms for topological insulator interface engineering and 2D electron gas (2DEG) confinement studies

FAQ

What is the typical lead time for custom-dimension or alternate-doping InSb wafers?
Standard 2-inch, 0.45-mm-thick, Ge-doped wafers ship within 5–7 business days from order confirmation. Custom specifications—including alternative orientations (, ), thicknesses (0.3–1.0 mm), double-side polish, or Sn/Si doping—require a minimum 6–8 week production cycle due to LEC crystal growth scheduling.
Do you provide epitaxial-ready surfaces or native oxide removal services?
Yes. Optional NH₄OH/H₂O₂/H₂O (SC-1) cleaning and in-situ oxide desorption via ultra-high-vacuum (UHV) annealing (≤450 °C, 10⁻⁹ Torr) are available as value-added services. Surface preparation reports include XPS O 1s peak analysis and contact angle measurements.
Is material certification available for export-controlled applications (e.g., ITAR/EAR99)?
All InSb wafers are classified EAR99 and shipped with dual-use commodity classification rulings. ITAR-free documentation packages—including non-proprietary crystal growth parameters and non-sensitive defect metrics—are provided upon validated end-user statement submission.