We plan to take some infrared pictures for one of our experiments; therefore, we need to replace a regular glass with a sapphire glass or any suggested materials with a transmission range close to our IR camera. It seems sensitive to the wavelength of 7.5 to 14 μm. The shape of the glass would be circular with an 8-inch diameter. Could you please provide us an estimated timeline and price for sapphire glass and any other suggested material?
8 Inch Sapphire Used for IR Camera Research
A PhD candidate requested the following quote:
UniversityWafer, Inc. Quoted:
8'' C-plane Sapphire substrate wafer,IR Grade for Camera
High Purity(>99.996%)and Monocrystaline Al2O3
Surface Ori: C-plane<0001> +/- 2deg
Notch Ori: A-axis<11-20> +/- 0.5° or None
Notch Depth: 1.0 + 0.25/-0.00 mm/Notch per SEMI M1-1105
Notch Angle: 90 +5°/-1 °
Diameter: 200.0+/-0.5mm
Thickness: 8.0 +/-0.1mm
Front side surface: Optical-polished,Ra</=1.0nm,Super transparent for IR transmission
Back side surface: Optical-polished,Ra</=1.0nm,Super transparent for IR transmission
Wafer edge: Round chamfer/bevel
TTV: </=45um
BOW: </=50um
Packaging: Clean room,vacuum sealed in PE bag
Reference #261767 for spec and pricing.
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200mm Sapphire Wafers to Collect Polymer
Sapphire wafers are scratch-resistant and have good thermal properties. Dimensions we need something that is 8'' (~200 mm) in diameter.
Researchers use 200mm Sapphire wafers to collect polymer out of the vapor phase under a vacuum. The researchers distilled PMMA under vacuum then use the sapphire to evaporate off of and onto.
Recycling 200mm Sapphire Wafers
A scientist requested the following: "We periodically purchase 100mm single-side polished sapphire wafers. I have two related questions. Do you have any 200mm sapphire in stock? This would likely be a one-off order; we only need about 10 or a cassette. Do you have any recycling programs in which we can sell back used sapphire wafers? We are using them as carriers for mounted semiconductor material through device fabrication."
UniversityWafer, Inc. Quoted:
Sapphire Wafer
Diam200mm, 2mm thick, SSP
Quantity: 10 Wafers
Reference #266764 for pricing
Round Silicon Wafers Cover for Base Electrode in Etching System
A scientist researching AR coatings requested the following quote for base sapphire substrates:
Can you quote us some double-side-polished sapphire wafers? We’d like 200mm round, ~1mm thick, with or without a flat is fine. We’ll use this as a cover for the base electrode in our etching system, so we are looking for the lowest grade material, no crystal Ori spec, but we do need it commercially polished both sides. Similar to what we just purchased at 150mm diameter.
Reference #206921 for specs and pricing.
Optically Polished 200mm Sapphire Wafers
A Chief Technology Officer requested a quote for the following:
200mm thickness: 700-900µm Ori: C-plane DSP, Ra<0.1µm (optically polished) Qty: 10
Reference #264043 for specs and pricing.
8-inch sapphire substrates are widely used in various industries for their larger size and enhanced capabilities. Here are five applications where 8-inch sapphire substrates find utility:
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Semiconductor Manufacturing: 8-inch sapphire substrates serve as a critical platform for the fabrication of semiconductor devices. They provide a larger surface area for the growth of epitaxial layers, enabling the production of high-performance electronic components such as integrated circuits (ICs), power devices, and radio frequency (RF) devices.
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LED Production: The larger size of 8-inch sapphire substrates is advantageous in the manufacturing of light-emitting diodes (LEDs). These substrates serve as a base for the deposition of gallium nitride (GaN) or indium gallium nitride (InGaN) layers, which are essential for producing efficient and high-brightness LEDs used in various lighting applications.
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Optical Windows and Lenses: 8-inch sapphire substrates are used to fabricate large optical windows and lenses. Their high transparency, excellent thermal stability, and scratch resistance make them suitable for optical applications requiring high-quality materials, such as cameras, telescopes, and laser systems.
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Silicon-on-Sapphire (SOS) Technology: 8-inch sapphire substrates are utilized in SOS technology, where a layer of silicon is deposited on the sapphire surface. This combination provides unique properties, such as high-frequency performance and radiation resistance, making it suitable for applications in wireless communication, aerospace, and defense industries.
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Large-area Thin Film Deposition: The larger surface area of 8-inch sapphire substrates allows for the deposition of large-area thin films. These substrates find applications in various thin film technologies, including protective coatings, solar cells, and displays.
200mm Sapphire Wafer Dielectric and Optical Properties
200mm sapphire wafers are used in optical, semiconductor, dielectric, and high-temperature research because sapphire offers excellent hardness, chemical resistance, thermal stability, optical transmission, and electrical insulation. These properties make 8 inch sapphire substrates useful for IR windows, ellipsometry, dielectric spectroscopy, thin film deposition, semiconductor processing, and optical test platforms.
Research Request:
A researcher asked for 200mm sapphire disks for ellipsometry and dielectric spectroscopy. The project required information on dielectric properties, optical properties, and potential use in multiple research systems.
Standard 8 Inch Sapphire Substrate Specifications
UniversityWafer supplies high-purity monocrystalline Al2O3 sapphire substrates in 200mm diameter for optical and semiconductor applications. Typical specifications may include C-plane orientation, epi-polished front surfaces, fine-ground or polished back surfaces, low total thickness variation, and cleanroom packaging.
- Material: High-purity monocrystalline Al2O3 sapphire
- Diameter: 200mm / 8 inch
- Orientation: C-plane <0001>
- Thickness options: 1300 µm, 1600 µm, 2 mm, 4 mm, and custom thicknesses
- Surface finish: SSP, DSP, optical polish, or epi-polish
- Packaging: Class 100 cleanroom vacuum sealed packaging
Sapphire Dielectric Properties
Sapphire is an excellent insulating substrate for dielectric testing, RF research, and high-frequency device applications. Its high volume resistivity, low dielectric loss, and strong breakdown field make it useful for electrical characterization and insulating wafer applications.
- Dielectric constant: approximately 8.3–11.3 from 10 MHz to 1 GHz
- Dielectric loss factor: ≤ 5 × 10-3
- Breakdown field: ≥ 15 kV/mm
- Volume resistivity at 20°C: ≥ 1013 Ω-cm
- Volume resistivity at 200°C: ≥ 1011 Ω-cm
- Volume resistivity at 400°C: ≥ 109 Ω-cm
- Volume resistivity at 600°C: ≥ 107 Ω-cm
Sapphire Optical Properties
Optically polished sapphire wafers are used as transparent substrates, IR windows, camera windows, laser windows, and optical test platforms. Sapphire offers strong transmission from ultraviolet through infrared wavelengths, along with excellent scratch resistance and thermal durability.
- Light transmission: ≥80% from approximately 0.3 µm to 5 µm
- Refractive index: no = 1.768
- Refractive index: ne = 1.760
- Surface roughness options: Ra ≤ 0.3 nm for epi-polished surfaces
- Excellent resistance to scratching, heat, and chemical exposure
Thermal and Mechanical Properties of Sapphire
Large-diameter sapphire wafers are selected for demanding environments because they combine mechanical strength with high thermal stability. These properties make sapphire useful for wafer carriers, optical windows, semiconductor process fixtures, and thin film deposition applications.
- Density: approximately 3.73 g/cc
- Elastic modulus: ≥300 GPa
- Thermal conductivity at 20°C: ≥22 W/m·K
- Coefficient of thermal expansion: approximately 6.0–9.0 × 10-6/K depending on temperature range
- Water absorption: ≤0.1%
Semiconductor Grade 8 Inch Sapphire Wafers
Semiconductor grade sapphire wafers are commonly requested for device fabrication, GaN epitaxy, thin film deposition, wafer carriers, optical research, and high-temperature processing. Researchers and engineers often specify DSP sapphire wafers when both surfaces must be commercially polished for optical or process compatibility.
Example Research Request:
Semiconductor grade DSP sapphire wafers in 100mm and 200mm diameters, with 1 mm, 2 mm, and 4 mm thickness options, supplied in cleanroom packaging for research and production qualification.
Cleanroom Packaging and Long-Term Sapphire Supply
UniversityWafer supplies 8 inch sapphire wafers in cleanroom vacuum-sealed packaging and reusable wafer cassette options for qualified applications. Long-term sapphire wafer supply is available for research programs, semiconductor process development, optical component manufacturing, and production qualification.
For actual measured values, specialized testing can be performed when a project requires guaranteed dielectric, optical, mechanical, or thermal property data.