HP / Agilent 4155C Semiconductor Parameter Analyzers

The HP/Agilent 4155C Semiconductor Parameter Analyzer delivers precision characterization of semiconductor devices through integrated source and measurement units. This modular platform measures voltage, current, and resistance with femtoamp and microvolt resolution, supporting diverse test modes from DC sweeps to quasi-static C-V analysis. Four Medium Power SMUs provide ±100 V / ±100 mA sourcing; two VSUs and two VMUs extend measurement flexibility. Optional high-power and pulse generator configurations enable advanced device stress testing and transient characterization.

## Technical Specifications

**Source and Measurement Units**
• Four Medium Power SMUs (MPSMU): 0 to ±100 V, ±1 pA to ±100 mA
• Two Voltage Source Units (VSUs): ±20 V range, 0.2 Ω output impedance, 120 mA current limit
• Two Voltage Measurement Units (VMUs): ±0.2 V to ±2 V differential mode, ±20 V common mode maximum
• Optional 41501B Expander: High-Power SMU (1 A / 200 V), dual pulse generators, low-noise ground unit

**Measurement Resolution and Accuracy**
• Current: 10 femtoamps (fA) resolution; ±(0.5% + 3 pA + 2 fA × Vout) for ±1 nA range
• Voltage (SMU): 2 µV resolution; ±(0.02% + 700 µV + 0.3 × Iout) for ±20 V range
• Voltage (VMU differential): 0.2 µV resolution; ±(0.03% + 10 µV + 0.3 µV × Vi) for ±0.2 V range
• Pulse width capability: 500 µs to 100 ms

**Optional High Voltage Plus Generator**
• Voltage: ±40 V, ±200 mA output
• Pulse performance: 1 µs minimum width, 2 µs minimum period

## Key Features

• Multiple measurement modes: sweep, sampling, quasi-static C-V, stress, and knob-sweep
• Single triaxial connector per SMU (non-Kelvin configuration)
• Voltage/current compliance limiting for device protection
• VSU slew rate: 0.2 V/µs; maximum load capacitance 10 µF

## Typical Applications

• Semiconductor device characterization and optimization
• Quality control and manufacturing process validation
• Research and development in device physics and reliability
• Transient and stress testing via optional pulse generators

## Compatibility & Integration

• Desktop EasyEXPERT software for PC-based GUI control
• I/CV 2.1 Lite automation software (standard); upgrade to I/CV 2.1 available
• Built-in instrument control interface