Lucas Labs Four-Point Probes and
Resistivity Testing Equipment

Signatone has been supplying four point probes and resistivity testing equipment since the earliest days of the industry. Choose your area of interest by clicking on one of the systems shown below.

QuadPro Resistivity Wafer Mapping System

Available in both manual and automatic 8" and 12" systems. The manual system includes a ball bearing stage and can be upgraded at a later time to add auto-stepping capability. The automatic systems are motorized and can automatically step through 9, 25, 49, or 121 test points on wafers of size 100 mm, 125 mm, 150 mm, 200 mm, or 300mm.

Signatone Pro4 Manual Four-Point Probe with Computerized Measurement System

The Signatone Pro4 series provides simple answers to sheet and bulk resistivity measurements. Since 1968, Signatone has offered an inline Four-Point Probing solution. To make the measurements, the user lowers the Four-Point Probe head onto the sample then selects the test button in the software. The computer automatically controls the Keithley 2400 series and steps through a number of current settings to find the ideal current for accurate readings.

Signatone Manual Four-Point Probes

Signatone manufactures a wide range of resistivity test equipment including an economical four point probe mounting stand and four point probe heads..