Tungsten needle is used as a probe in a four probe tester. Four probe tester is a multi-purpose comprehensive measurement device that uses the four-probe measurement principle. Such a probe that has characteristics of long service life, accurate positioning and low migration rate. And it may be made using high wear-resistant tungsten carbide as a raw material.
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Tungsten needles on a four probe tester: As the instrument name implies, there are four tungsten probes on the tester; the probe spacing is 1mm; the main component of the probe is tungsten carbide; the diameter is 0.5mm.
The four probe tester is mainly used to measure the radial and axial resistivity of sheet and bulk semiconductor materials, and measure the sheet resistance (square resistance) of the diffusion layer. In other words, tungsten needle is mainly used to test the resistance performance of semiconductor materials in semiconductor material factories, semiconductor device factories, scientific research institutions, colleges and universities.
