Synthetic QuartzSpecification

Infrared absorption coefficient α

The following grades are set for the infrared absorption coefficient α (the wave number 3585 cm–1 is used) according to IEC60758.

Grade Infrared absorption
coefficient
Reference infrared
Q value
α3585 (X104)
Aa 0.015 380
A 0.024 300
B 0.05 240
C 0.069 180
D 0.1 140
E 0.16 100

Etch channel density

The following grades are set for etch channel density ρ according to IEC60758.

Grade Etch channel density
(m-2)
1aa 2
1a 5
1 10
2 30
3 100
4 300

Our seed quality gurantee the etch channel density grade 2.
In addition,we can provide grade 1.

Direction,diameter and position of Seed

The direction of Seed is 0°00' ±15' .The dimensions of the Z-axis direction assume it 1.5mm±0.5mm. The Seed is included in a shaded area shown by the following figure.

Specification of lumbered
Angle
Angle of the Z'surface in the X-axis direction: 0°00' ±30'
Angle of the X'surface in the Y-axis direction: 0°00' ±15'
Angle of the X'surface in the Z’-axis direction: 0°00' ±15'
Tolerance of diameter ±0.1mm
"Roughness With a diamond wheel of #80"