Sapphire Wafer Material Properties

Sapphire is a precious gemstone a variety of the mineral corundum consisting of aluminum oxide α al 2 o 3 with trace amounts of elements such as iron titanium chromium vanadium or magnesium.

Sapphire wafer material properties. Sapphire wafers and sapphire substrates are available in c r a and m plane orientations. Silicon on sapphire wafers. Unparalleled hardness outstanding chemical resistance low refractive index and melting point over 2000 c make synthetic sapphire a versatile material of the future. Synthetic sapphire is second in hardness only to diamond and retains its high strength at high temperatures.

On a plane material we routinely process pieces to 0 002. It is chemically inert and easily withstands harsh chemicals such as fluorine plasma and other industrial gasses and fluids with no particle generation. Typical properties of sapphire wafers and substrates sapphire is a single crystal al 2 o 3 with a hexagonal rhombohedral crystal structure. Large geometry substrates wafers and windows of glass quartz fused silica metal and ceramic plates as large as 36 x 36 are available to tolerances within microns.

Kyocera s sapphire substrates feature excellent material properties and are mass produced for silicon on sapphire sos wafers. Introduction single crystal sapphire alumina al2o3 offers superior physical chemical and optical properties which make it an excellent material for applications such as high speed ic chips thin filmsubstrates andvariouselectronicandmechanicalcom ponents 1 3. Valley design is an iso 9002 certified company with nearly 30 years of experience performing precision lapping and polishing materials. Kyocera s sapphire wafers feature excellent material properties and mass producibility.

It is a very hard material with a high heat resistance and is highly inert resistant to attack in most process environments i e. Products monocrystal sg wafers for next gen led. Parti sapphires show two or more colors. Kyocera is prepared to meet future customer needs for larger wafer sizes and enhanced particle suppression.

In addition sapphire can transmit ultraviolet visible and infrared light as well as microwaves a range broader than most materials. Properties of synthetic sapphire synthetic sapphire is the hardest of all known oxide crystals with a 9 on the mohs scale. Polished sapphire wafers synthetic sapphire is an aluminum oxide material grown in a hexagonal crystalline form. However for special applications we have made parts as thin as 0 0005.

High temperature and pressure windows or where corrosion resistance and abrasion resistance are required. It is typically blue but natural fancy sapphires also occur in yellow purple orange and green colors.