Specs of MgO substrate

• Size: 5mm x 5mm x 0.5mm +/-0.05 mm
• Orientation: (100) +/-0.5 ^o
• Polish: Two sides EPI polished by CMP technology with minimum sub-surface damage.
• Surafce Roughness: Ra < 5A
• Packing: The substrate is packed with 100 grade clean plastic bag under 1000 class clean room.
• Precautions: MgO is sensitive to moisture, and must be stored in vacuum box.

	Typical Properties
Crystal Structure	Cubic, a=4.216 A
Growth Method	Special Arc Melting
Typical Purity:	>99.95%
Typical Impurity (ppm)	Ca <40, Al<15, Si<10, Fe<50, Cr <10, B<, C <10
Melting Point	2852 oC
Crystal Purity	> 99.95%
Crystal cleavage plane	<100>
Density	3.58 g/cm3
Dielectric constant	9.8
Thermal expansion	12.8 x10-6/ oC
Optical Transmission	> 90% @ 200 ~ 400 nm > 98 % 500 ~ 1000 nm
Crystal Prefection	No visible inclusions and micro cracking, X-Ray rocking curve available
Standard MgO Crystal Substrates Specification
Orientation	<100> +/- 0.2o <110> and <111> +/- 0.5o
Polished surface	EPI polished on one side or two sides to Ra < 5A

Special size and orientation are available upon request