Zhongjiaojinyuan AULTT-FTVM Four-Point Probe 3D Sample Positioning Stage
| Brand | Zhongjiaojinyuan |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | OEM Manufacturer |
| Product Origin | Domestic (China) |
| Model | AULTT-FTVM |
| Price | USD 2,750 (FOB Beijing) |
Overview
The Zhongjiaojinyuan AULTT-FTVM Four-Point Probe 3D Sample Positioning Stage is an engineered mechanical platform designed for precision alignment and stable electrical contact in semiconductor characterization, photovoltaic device evaluation, and optoelectronic material testing. Unlike conventional two-point measurement setups, this stage integrates the four-point probe method—a standard technique defined in ASTM F1529 and ISO/IEC 17025-compliant laboratories—to eliminate contact resistance errors and enable accurate sheet resistance (ρs) and resistivity (ρ) extraction from thin-film and bulk semiconductor samples. Its modular 3-axis architecture supports orthogonal sample orientation (vertical or horizontal), enabling synchronized illumination and electrical probing under controlled optical excitation—critical for quantum efficiency mapping, photocurrent-voltage (J-V) curve acquisition, and transient photoconductivity studies. The stage is not a standalone measurement instrument but a metrologically traceable positioning subsystem intended for integration with source-measure units (SMUs), solar simulators (e.g., Class AAA), lock-in amplifiers, and spectroradiometric systems.
Key Features
- Three-axis manual translation (X/Y/Z) with ±25 mm travel per axis and 20 µm resolution via precision micrometer heads
- Orthogonal kinematic design using hardened steel linear guides and precision-ground lead screws to suppress mechanical hysteresis and vibration-induced drift
- Modular probe mounting system accommodating square samples from 25 × 25 mm to 45 × 45 mm; probes secured in non-adhesive, electrically isolated ceramic sleeves to prevent ground loops and parasitic capacitance
- Spring-loaded tungsten carbide-tipped probes with Cu-plated shanks ensure low-contact-resistance ( 10⁵ actuations), and minimal surface indentation on soft semiconductors (e.g., perovskites, organic films)
- Structural footprint of 220 × 190 × 328 mm (W × D × H); load capacity ≥ 2 kg with thermal stability maintained over 15–35 °C ambient range
- Designed for compatibility with vacuum-compatible enclosures (optional O-ring grooves) and inert-atmosphere gloveboxes (N₂/Ar purged)
Sample Compatibility & Compliance
The AULTT-FTVM accommodates rigid and semi-rigid planar substrates including silicon wafers, ITO/glass, FTO-coated quartz, flexible PET-based electrodes, and evaporated metal contacts. It complies with key physical metrology requirements for four-point probe measurements as specified in ASTM F84 (Standard Test Method for Measuring Resistivity of Silicon Wafers) and SEMI MF1530. All mechanical tolerances are certified per ISO 2768-mK general tolerancing standards. Electrical isolation between probe channels exceeds 10¹² Ω at 100 V DC (tested per IEC 61000-4-8), ensuring signal integrity during low-current (< 1 nA) photogenerated carrier measurements. The platform’s construction materials (6061-T6 aluminum frame, stainless steel hardware, PTFE-insulated probe holders) meet RoHS 2011/65/EU directives and support GLP/GMP-aligned lab documentation workflows.
Software & Data Management
While the AULTT-FTVM manual version operates without embedded electronics, its mechanical repeatability enables full traceability when paired with external motion controllers or data acquisition systems. For integrated operation, Zhongjiaojinyuan provides optional LabVIEW™-compatible DLLs and Python API wrappers supporting NI PXIe-8840 or Keysight 34972A DAQ platforms. All position logs can be time-stamped and exported in CSV format alongside concurrent electrical readings, satisfying FDA 21 CFR Part 11 audit trail requirements when used within validated QC environments. Firmware updates (for motorized variants) are delivered via signed USB firmware packages with SHA-256 checksum verification.
Applications
- Calibration and validation of solar cell quantum efficiency (QE) and external quantum efficiency (EQE) test benches
- In-situ sheet resistance monitoring during thermal annealing or solvent vapor exposure of perovskite precursors
- Position-resolved Hall effect measurements on epitaxial heterostructures under magnetic field bias
- Multi-point conductivity profiling across printed electrode arrays for flexible electronics qualification
- Correlative optoelectronic mapping: simultaneous spatial registration of photocurrent, PL lifetime, and surface potential (Kelvin probe mode)
FAQ
Is the AULTT-FTVM compatible with vacuum or glovebox environments?
Yes—standard configuration includes vacuum-compatible fasteners and optional O-ring sealing kits for operation down to 10⁻³ mbar. Probe sleeves are rated for inert gas purging (N₂, Ar) without outgassing.
What is the maximum sample thickness supported?
The Z-axis travel allows accommodation of samples up to 35 mm thick when mounted on the standard base plate; custom height extensions are available upon request.
Can I retrofit my existing AULTT-FTVM with motorized axes?
Retrofit kits (including stepper motors, drivers, controller, and mounting brackets) are offered as a factory-certified upgrade path with full mechanical recalibration and ISO 17025 traceable performance validation.
Does the platform include calibration certificates?
Each unit ships with a dimensional inspection report (per ISO 10360-2) and mechanical repeatability certification (±0.02 mm over full stroke, 3σ confidence). NIST-traceable electrical calibration is performed separately on connected SMUs or electrometers.
How is probe alignment verified before measurement?
An included optical alignment jig (with 10× magnification crosshair reticle and adjustable collimated LED) enables sub-50 µm visual verification of probe-tip coplanarity relative to the sample surface plane.
