Materials

Polished Glass Substrates
Bullen Ultrasonic's goal is to be your one source for high quality polished glass substrates.

Bullen has proven expertise in the Ultrasonic Machining of holes, slots and blind cavities or trenches. Our double sided lapping and polishing equipment provides superior finish and parallelism.

Easy to Order... Borosilicate Material
Pyrex 7740 (Stock)
Schott Borofloat (Stock)
Hoya SD2 (Special Order)

Standard Sizes
(Ordering standard sizes improves price and delivery)
Custom sizes available (Special Order)
O.D. (Ground edge with safety bevel)
76.2 mm +/- 0.25 mm
100.0 mm +/- 0.25 mm
4.0" +/- 0.01"
150.0 mm +/- 0.25 mm
6.0" +/- 0.01"

Thickness
Standard Orders: 0.50 mm and up
Special Orders: 0.25 mm and up
TTV < 9 Microns

Thickness Tolerance
Standard: +/- 0.05 mm
Tightened: +/- 0.025 mm

Standard Surface Finish
Both sides polished
60/40 Scratch/Dig Per MIL 13830B
Surface finish < 20 Ang. (2.0 nm) Ra maximum
OD (Edge) Chips Allowed < 1.0 mm

Drilled Substrates
Specifications
Minimum Hole Diameter: 0.25 mm
Location Tolerance:
Standard: +/- 0.1 mm
Tightened: +/- 0.05 mm

Note: A maximum of 1% of the holes are allowed to be missing or out of tolerance.
Delivery: Standard orders - delivery can begin within 4 to 6 weeks at receipt of order.