Sapphire Single Crystal Sapphire substrates are ideal for epitaxial deposition of GaN and other III-V and II-VI thin-films for use in the manufacture of bright blue and green LED's. C-axis  oriented wafers are available in the sizes shown below. One side is highly polished to 1 nm or less and the second side is either fine ground or optically polished. The parts are available in lots of 10 or 25 in cassettes packaged in Class-100 clean room under nitrogen and are EPI ready.
Sapphire Substrates are custom fabricated to order and typically require a 1 week lead time.
|50.8mm Dia||76.2mm Dia|
|Crystal||Single crystal Sapphire||Single crystal Sapphire|
|Orientation|| C-axis, +/- 0.2 deg.|| C-axis, +/- 0.2 deg.|
|Dia. Tol.||+/- 0.25mm, fine grind OD||+/- 0.25mm, fine grind OD|
|Thickness||0.332 mm||0.550 mm|
|Thickness Tol.||+/- 0.25mm||+/- 0.25mm|
|Primary Flat|| A-axis +/- 0.3 deg.|| A-axis +/- 0.3 deg.|
|Flat length||16.0 +/- 1.5mm||22.0 +/- 1.5mm|
|Front side Surface||EPI polish, (Ra)< or = 1 nm||EPI polish, (Ra)< or = 1 nm|
|Back side Surface||Fine Ground, R max 5-10 um||Fine Ground, R max 5-10 um|
|Optically Polished 80-50||Optically Polished 80-50|
|TTV||< 25 um||< 30 um|
|BOW||< 20 um||< 30 um|
|Laser mark||upon request||upon request|
|Packaging||Vacuum packed cassette, class||Vacuum packed cassette, class|
|100 clean room, under nitrogen||100 clean room, under nitrogen|
|Cleanliness||EPI ready||EPI ready|
Sapphire Substrates are custom fabricated to order and typically require a 1 week lead time. Quantity discounts are available. Contact Us for more information.