HL 5500
Hall Mobility Features and Benefits
- AC/DC measurement modes. The use of AC currents and phase sensitive detection eliminates thermal effects, long term drifts and significantly enhances signal-to-noise ratios. DC mode is useful when rate dependent trapping, rectification due to non-ohmic contacts or stray capacitances may affect AC currents
- Van der Pauw, Hall Bar and Bridge measurements to ASTM F-76 standard
- Simple probe system for convenient and fast sample throughput
- Compact bench top design
- Wide current range including auto-current facility in order to minimize sample heating
- User defined electric field limitation to avoid impact ionization effects at low temperatures
- Optional high impedance buffer amplifier/current source to extend sheet resistivity measurements to 10″Ω/ٱ
- Software control of all measurement functions, data reduction and storage, text and graphical output to printer
- Optional variable temperature capabilities
a) Two-point, room temperature and 77K
b) 90K to 500K liquid nitrogen cryostat
- Rare earth permanent magnet giving excellent stability
- Light-tight sample enclosure avoiding measurement errors due to photo generated effects
- Probe system allowing rapid sample set-up for room temperature and 77K assessment of wafers up to three inch diameter
- Extensive verification of measurement validity including contact checking algorithms
- Electro-forming circuitry for contact formation
