FOUR PROBE RESISTANCE SYSTEM

FOUR PROBE  CHARACTERIZATION SYSTEM includes

The system is a complete FOUR PROBE  CHARACTERIZATION SYSTEM.

The system contains the following elements:

Probe station

Micropositioner

Sourcemeter:

Current range: 1 nA- 250 mA

Resistance range:  0.1 m -1 M

Software

Voltage- Current characteristics

Resistance-Current characteristics

What is a Four-Point Probe?

The four-point probe is the most commonly-used piece of equipment for measuring the sheet resistance of a material. Sheet resistance is the resistivity of a material divided by its thickness, and represents the lateral resistance through a thin square of conducting/semiconducting material. This measurement uses four probes arrayed in a line, with equal spacing between each probe. A current is passed between the outer two probes, causing a reduction in voltage between the inner two probes. By measuring this change in voltage, the sheet resistance can then be calculated.