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There is an increasing demand in the aerospace industry for
large sapphire windows. Airplanes and UAVs, (Unmanned
Aerial Vehicles), have advanced reconnaissance systems
and other large view ports that sapphire is perfectly suited
for. Sapphire is also increasingly viewed as a window
material upgrade from Zinc Sulfide (ZnS) and Magnesium
Fluoride (MgF2) for these airborne applications. It is
well known that sapphire is commercially available
unlike other optical materials such as Alon and
Spinel which toil in R&D mode.
Sapphire is being adopted for aerospace applications because of the flexibility that sapphire material affords optical engineers in terms of sizes, optical properties, mechanical properties and the wide transmission range from the VUV to the near IR. These unique parameters, along with the availability of 15” diameter sizes, give the material a real advantage over other optical materials. HEM sapphire is optimized for use in aerospace applications; low scattering bulk material with near perfect crystalline structure yields high performance windows. Crystal Systems has focused on being the best optical sapphire supplier in the world; our valued customers continue to validate our work. 
The market for Light Emitting Diodes, LEDs is in its infancy.
Still, for over fifteen years Crystal Systems has been a trusted
supplier! Sapphire is the number one substrate material being
used for the deposition of Gallium Nitride, GaN. The quality,
price, and availability of sapphire give it the lead position in the
High Brightness LED, HBLED market. The sapphire material
used for deposition of GaN must be low defect density with
high purity. It is important to control the crystalline
orientation accuracy to avoid GaN defects and maximize
brightness. Moreover, like the silicon semiconductor industry,
sapphire sizes are scalable. Crystal Systems supports the
commodity size 2” substrates and also supplies 8” diameter
wafers for cutting edge LED research. Please consider Crystal
Systems for its quality, technical knowledge and experience in
this field. To be successful supplying sapphire for the LED
industry; you need high quality, delivery and price,
Crystal Systems has all three.
There is an increasing number of mechanical sapphire
applications including semiconductor wafer carriers, wear parts,
nozzles, bearings, blades, tubes and jewel bearings. HEM
sapphire possesses excellent hardness, strength, thermal
shock resistance with operating temperatures over 1800
degrees Celsius. These attributes allow HEM sapphire to safely
operate where other structural materials will fail. The current
and emerging engineering applications for mechanical sapphire
rely on consistent mechanical strength, purity and orientation
Sapphire components can be installed in high temperature equipment without worrying about life times or the possibility of contaminating the chamber environment. Other mechanical applications such as liquid chromatography require well-annealed and low stressed material. HEM sapphire is low stressed because of the anneal cycle used during the crystal growth cycle. Fabrication processes after growth are low damage in order to ensure no subsurface damage or micro fracturing exists in the components. HEM sapphire is grown without stress and fabricated using low damage processes to yield high performance components that will operate in environments that most materials will not survive. |
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