Products

COROSIVE MATERIALS VALVED CRACKER

(As, Sb, Zn, Se, Cd, CdTe, Te, and Mg)
Impeccable efficiency with a state of the art design

MBE SOURCES designed and fabricated with high quality and competitive prices. Our MBE sources are compatible with all MBE systems.

VESCO-NM’s corrosive Materials valved cracker is used in MBE growth, to crack reactive materials with high-vapor pressure such as Sb, Zn, Se, Cd, CdTe, Te, and Mg. In this source, the crucible, cracking tube and valve assembly are manufactured from PBN to avoid any corrosion. The source has ONLY two integrated heaters for bulk and cracking zones – without heat separation or gap – to avoid materials condensation and to reduce the cost by using less power supplies and temperature controllers. An easy material loading process is achieved using either the removable valve assembly or through the loading flange. The PBN valve assembly is designed to achieve fast flux stabilization, excellent uniformity across substrate, and quick/complete shut-off to minimize materials wasting. The valve can be controlled by automated valve positioners. The valve travel distance limits are secured by internal mechanisms to avoid any possible adjustment-related damage or stress on the PBN parts.

Specification:

1. Compatible with all MBE systems
2. Suitable for corrosive materials such as Sb, Zn, Se, Cd, CdTe, Te and Mg
3. 200-300 CC PBN crucibles (As required)
4. Integrated heaters assembly (No heat gap / no materials condensation)
5. Tip heater: 600-1200°C
6. Bulk heater: 200-800°C
7. Out gassing temperature: 1400-1500°C
8. High flux uniformity
9. Excellent flux stability
10. Dynamic flux range: Two-three orders of magnitude
11. Easy to maintain and to charge
12. 4.5” Mounting flange
13. Length inside vacuum: 12.85”
14. Total air length: 24.50”
15. Valve travel distance: 0.400”
16. Number of turns: 18 turns
17. Open position: CW
18. Close position: CCW
19. Valve position is controlled either manually or automatically
20. Charge material size: 0.470” or less
21. Can be operated in cracked or un-cracked mode
22. Water cooling: Double wall for bulk zone
23. Optional: cooling coil for cracking zone
24. Power supplies: Only two power supplies and two thermocouples
25. Flexible orientation installation
26. One power feed through and one thermocouple feed through