Institute for Single Crystals

National Academy of Sciences of Ukraine

61001, Ukraine, Kharkiv, 60 Nauky Ave., phone/fax: +38(057)340-86-19, e-mail: info@iscrystals.com

Materials and Products - Large-Size Sapphire Crystals

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Sapphire Substrate Blanks Sapphire substrate blanks for Micro- and Optoelectronics with diameter from 25 to 250 mm and thickness to 40 mm

Specification

Size, mm	Diameter 25...250, thickness to 40
Accuracy of preparation, mm in diameter in thickness	±0.05 ±0.05
Blocks, twins, twin layers and cracks, inclusions that are visible in polarized light	Not allowed
Quality of the surfaces	Grinding finish
Roughness of the surfaces (Ra), Å	< 1
Transmission (%): visible and IR spectral region (to 4,5 μm) UV spectral region (0,2 μm)	85-87 70
Internal voltages, kg/mm2	≤2
Crystallographic orientation

61001, Kharkov, 60 Lenin Ave.
phone:  +38(057)340-86-19,
fax:       +38(057)340-86-19,
e-mail:   info@iscrystals.com

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