Material: High Purity >99.99%, single crystal Al2O3
Thickness: 430 um +/- 25 um for SSP and 400 um +/- 15 um for DSP (other thickness available upon request)
Orientation: C plane (0001) to M (1-100) 0.2 +/- 0.1 degree off.
Polishing: single side polished polished side surface Ra < 0.3 nm, back side fine-ground Ra = 0.8 ~ 1.2 um, or double side polished both front and back sides surface Ra < 0.3 nm
