Pyrex 7740 and Borofloat 33 Glass Wafers
Pyrex 7740 wafers and Borofloat 33 wafers are low-expansion borosilicate glass substrates commonly used for anodic bonding, MEMS devices, microfluidics, optical research, and semiconductor processing.
UniversityWafer supplies standard and custom borosilicate glass wafers in multiple diameters and thicknesses. We also offer thinner Pyrex wafers, including 50 micron glass wafers, for specialized research applications.
For projects that do not require Pyrex 7740 or Borofloat 33, we also offer lower-cost D263 glass wafers for display, optics, and general glass substrate applications.
Available Pyrex 7740 Wafer Sizes
- Diced Pyrex 7740 wafers
- 1 inch Pyrex wafers / 25.4 mm
- 2 inch Pyrex wafers / 50.8 mm
- 3 inch Pyrex wafers / 76.2 mm
- 4 inch Pyrex wafers / 100 mm
- 6 inch Pyrex wafers / 150 mm
- 8 inch Pyrex wafers / 200 mm
- 12 inch Pyrex wafers / 300 mm
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Standard 4 Inch Pyrex 7740 Wafer Specs
Below are common specifications for a standard 4 inch Pyrex 7740 borosilicate glass wafer. Custom diameters, thicknesses, and polish options may also be available.
- Material: Borosilicate glass, Pyrex 7740 or Borofloat 33
- Diameter: 100 ± 0.3 mm
- Thickness: 500 ± 25 µm, with 175 ± 25 µm options available
- Polish: Double side polished glass wafer
- Surface roughness: < 1.5 nm Ra
- TTV: < 10 µm
- Edge: Ground C-shape edge with primary flat according to SEMI standard
- Surface quality: Scratch-dig 60-40 according to MIL-PRF-13830
- Clear aperture: 90 mm diameter
- Packing: Cleanroom packed, Class 1000 according to Fed 209
What is Pyrex 7740 Glass?
Pyrex 7740 glass wafers
are low-expansion borosilicate glass substrates used in research, MEMS processing, anodic bonding, microfluidics, optics, and high-temperature applications.
Pyrex 7740 is valued because it has strong chemical resistance, good thermal shock resistance, and a low coefficient of thermal expansion.
Researchers often use Pyrex 7740 wafers when they need a stable glass substrate that can handle temperature changes, wet chemical processing, and wafer-level bonding. These properties make Pyrex useful for silicon-to-glass anodic bonding, lab-on-chip devices, pressure sensors, optical windows, and semiconductor research.
Pyrex 7740 vs Borofloat 33
Pyrex 7740 is a Corning borosilicate glass trademark, while Borofloat 33 is a SCHOTT borosilicate glass trademark. Both materials are commonly used for similar wafer applications because they offer low thermal expansion, good optical transmission, and high chemical durability.
UniversityWafer supplies Pyrex 7740 and Borofloat 33 glass wafers in standard and custom diameters, including diced pieces, 1 inch, 2 inch, 3 inch, 4 inch, 6 inch, 8 inch, and larger custom sizes. Thin Pyrex wafers are also available for specialized research projects.
Common Pyrex 7740 Wafer Applications
- Anodic bonding: silicon-to-glass bonding for MEMS and sensor fabrication
- Microfluidics: glass substrates for lab-on-chip and fluidic devices
- Optics: windows, mirrors, and low-expansion optical components
- Semiconductor research: insulating glass wafers for device fabrication
- High-temperature testing: borosilicate wafers for thermal and chemical stability
Why Buy Pyrex Glass Wafers from UniversityWafer?
UniversityWafer provides borosilicate glass wafers for universities, laboratories, and production teams that need reliable substrate materials. Tell us your required diameter, thickness, polish, quantity, and application, and we can help quote the best Pyrex 7740 wafer or Borofloat 33 wafer option for your project.
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