Resistivity Systems
Four-point probing since 1968 — manual benches to automated mapping.
Overview
Signatone has offered inline four-point probing solutions since 1968. The Pro4 provides simple, reliable sheet and bulk resistivity measurement; the QuadPro2 adds automation, full-wafer mapping, and dual-configuration testing per ASTM F84-99; ΩPro handles general resistance testing. SP4 and HT4 four-point probe heads complete the system.
Specifications
Inline four-point sheet & bulk resistivity — data sheet rev 1.8.
| Measurement | Manual four-point sheet & bulk resistivity |
| Sheet-R range | 10 µΩ – 100 MΩ per square (standard) |
| Instrument control | Keithley 2450 / 2600 |
| Stands | 100 mm / 150 mm / 200 mm / 300 mm |
| Configurations | Pro4-4 / Pro4-6 / Pro4-L / Pro4-B / Pro4-U |
| Probe heads | SP4 / HT4 four-point heads |
Automated resistivity & full-wafer mapping — data sheet rev 1.7.
| Measurement | Automated V/I, sheet R, resistivity, thickness |
| Sample sizes | 10 – 300 mm |
| Test points | 5 – 14,000 · up to 50 measurements/min |
| Mapping | 2D / 3D contour |
| Standard | Dual-configuration per ASTM F84-99 |
| Calibration | NIST-traceable |
Specs from the Pro4 data sheet rev 1.8 and QuadPro2 data sheet rev 1.7.
Models & datasheets
Current-revision datasheets, straight from Signatone. No login.
| Model | Description | Datasheet | Quote |
|---|---|---|---|
| Pro4 | Inline four-point sheet and bulk resistivity test system. | PDF ↓ | Quote → |
| QuadPro2 | Automated resistivity measurement system with full-wafer mapping. | PDF ↓ | Quote → |
| ΩPro | Resistance testing system. | PDF ↓ | Quote → |
| SP4 / HT4 heads | Four-point probe heads — selection guide for spacing, load, and tip material. | PDF ↓ | Quote → |
Gallery
Configurations and detail shots from current production. Click any photo to enlarge.
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