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Systems for Quality Control and Characterisation of MBE Processes
Molecular beam epitaxy takes place in high vacuum or ultra-high vacuum. The most important aspect of MBE is the deposition rate (less than 50 nm/minute) that allows the films to grow epitaxially, that is the growth of a thin layer on the surface of a crystal so that the layer has the same structure as the underlying crystal.
The deposition rates require an ultra high vacuum to achieve the same impurity levels as other deposition techniques.
The absence of carrier gases as well as the ultra high vacuum environment of the MBE technique produces the highest achievable purity of the grown films.
The Hiden HALO 201 MBE is a residual gas analyser designed for vacuum contamination analysis, the probe’s sensitive ionisation region is totally shrouded to inhibit random surface deposition. Construction materials are restricted to stainless steel, molybdenum and alumina to minimise potential process contamination in aggressive environments. The unit has a mass range of 1-200 amu for measurement of all common gases and contaminants.
The Hiden XBS deposition rate monitor is for molecular beam analysis and provides signal for accurate deposition rate control for growth rates to as low as 1 Angstrom/second.
The Hiden Modular SIMS provides in situ thin film characterisation and contamination control for in situ depth profiling, SIMS imaging and protection of the chamber from contamination.
The Hiden AutoSIMS and TPD Workstation are offered as standalone thin film characterisation tools providing vital information for film quality/production control.