Home Products Beryllium Products Vacuum-UHV Assemblies CF Flange Window Assemblies HIGH TEMPERATURE CF FLANGE WINDOW ASSEMBLIES For more than 30 years, Materion has offered standard and custom beryllium X-ray window solutions to satisfy the most demanding industrial and scientific research applications. We specialize in CF flange (ConFlat® flange) mounted diffusion bonded beryllium windows, beryllium X-ray windows and larger assemblies for UHV applications for scientific and photonics research. Using an advanced diffusion bonding process to produce these UHV window assemblies for research chambers, the beryllium windows are heated at temperatures well below the melting point, avoiding the structural damage that occurs from conventional brazing alloys. As a result, our CF flanges can obtain high temperature performance, without compromising beryllium strength. Diffusion bonded UHV beryllium windows are capable of sustaining bakeout temperatures up to 842°F (450°C). CF FLANGE APPLICATIONS & SPECIFICATIONS CF flange diffusion bonded UHV windows are essential for research requiring extremely controlled environments. From photonics to precise chemical deposition, ultra-high vacuum chambers require reliable seals. Our CF flanges are leak tight to a helium mass spectrometer leak-rate of 1x10-9 atm-cc/sec. Flange diameters range from 1.33 inch (34 mm) up to 16.5 inch (419.1 mm) with foil thicknesses as small as 0.002 inch (0.05 mm) up to 0.02 inch (0.5 mm). Beryllium foil is available in IF-1®, PF-60® and PS-200® grades. Our CF flanges and ultra-high vacuum chambers are used for a variety of processes: X-ray photoelectron spectroscopy (XPS) Auger electron spectroscopy (AES) Chemical vapor deposition (CVD) Thermal desorption spectroscopy (TPD) Atomic layer deposition (ALD) Secondary ion mass spectrometry (SIMS) Particle accelerator experiments For more detailed information, read our CF flange mounted window assemblies data sheet. STANDARD CF FLANGE CATALOG We maintain a supply of standard size ConFlat flanges with the largest functional aperture size already machined to keep order processing and delivery times to a minimum. Catalog CF flange assemblies are typically available within six weeks of your order. Please see the table below to determine which flange best meets the needs of your application. After identifying the correct flange, request a quote by specifying order number, beryllium foil grade and foil thickness. Order Number Flange Outside Diameter Aperture Diameter Minimum Foil Thickness DB275153 ø70mm (ø2.75") ø39mm (ø1.53") 0.13mm (0.005") DB338200 ø86mm (ø3.38") ø51mm (ø2.00") 0.18mm (0.007") DB450277 ø114mm (ø4.50") ø70mm (ø2.77") 0.25mm (0.010") DB600427 ø152mm (ø6.00") ø108mm (ø4.27") 0.38mm (0.015") DB800560 ø203mm (ø8.00") ø142mm (ø5.60") 0.50mm (0.020") CUSTOMIZED CF FLANGE SOLUTIONS If standard sizes do not work for your application, our engineering staff can develop a custom CF flange assembly to your specifications. We can design to your requirements or build to your design specifications. UNMATCHED QUALITY AND EXPERTISE We are the only fully integrated manufacturer of beryllium window assemblies in the world. All critical beryllium processing, design engineering, and joining fabrication is performed in-house. CONTACT US TO LEARN MORE Learn more about our UHV chambers and CF flange window products by talking with our team of experts.