Labthink CHY-C2A Mechanical Contact Thickness Gauge for Thin Films and Flexible Substrates

Overview

The Labthink CHY-C2A Mechanical Contact Thickness Gauge is a precision metrology instrument engineered for high-reproducibility thickness measurement of ultra-thin functional films and flexible substrates used in advanced electronics manufacturing. It operates on the principle of controlled mechanical displacement sensing: a calibrated, pneumatically stabilized measuring head applies a defined normal force to the specimen surface, while a high-resolution linear variable differential transformer (LVDT) transducer captures dimensional change with sub-micron resolution. This contact-based methodology ensures traceable, standardized measurements compliant with international thin-film metrology protocols—particularly critical for quality assurance in transparent conductive oxide (TCO) production, where ITO (indium tin oxide) film thickness directly governs sheet resistance, optical transmittance, and interfacial adhesion performance. Unlike non-contact optical or eddy-current methods, the CHY-C2A eliminates refractive index dependency and substrate transparency constraints, making it suitable for opaque, multilayered, or highly scattering materials—including battery separator membranes, lithium-ion anode/cathode coatings, polymer electrolytes, and metallized foils.

Key Features

• High-resolution measurement capability down to 0.1 µm, enabling detection of thickness variations across nanoscale deposition gradients typical in sputtered or evaporated ITO layers.
• Programmable mechanical loading system with dual pressure modes: 17.5 ± 1 kPa optimized for delicate thin films (e.g., <500 nm ITO on PET), and 50 ± 1 kPa for rigid or fibrous substrates such as filter papers and battery separators.
• Interchangeable anvil assemblies with standardized contact areas (50 mm² for films, 200 mm² for paper)—fully compliant with ASTM D6988 Annex A1 and ISO 4593 Annex B requirements for flatness-controlled sampling.
• Motorized auto-feeding mechanism supporting user-defined step intervals (0.1–50 mm), measurement point count (1–99), and traverse speed—enabling automated thickness profiling across wafer-scale or roll-to-roll samples.
• Dual-range sensor architecture: standard 0–2 mm range for routine QC; optional extended ranges up to 12 mm accommodate thick laminates, gel electrolytes, or composite battery electrodes without recalibration.
• Robust industrial-grade chassis (32 kg mass) with vibration-damped base and temperature-stabilized LVDT electronics, minimizing thermal drift and mechanical hysteresis over extended operation cycles.

Sample Compatibility & Compliance

The CHY-C2A accommodates a broad spectrum of planar, non-porous, and moderately compressible specimens relevant to microelectronics, energy storage, and packaging industries. Validated applications include ITO-coated glass/PET substrates, PVDF-based battery separators, copper-clad polyimide flex circuits, silicon wafers (with protective tape), aluminum foil current collectors, and pharmaceutical blister lidding foils. All measurement protocols align with regulatory test standards mandated under ISO/IEC 17025-accredited laboratories: ASTM D6988 (Standard Test Method for Thickness of Plastic Film by Mechanical Gauging), ISO 4593 (Plastics — Film and Sheet — Determination of Thickness), GB/T 6672 (Chinese national standard for plastic film thickness), and YY/T 0698.4 (Medical packaging—Requirements for sterilization barrier materials). The instrument’s pressure calibration certificate is NIST-traceable, and its mechanical repeatability (<0.3% RSD at 100 µm) satisfies GLP audit requirements for QC documentation in FDA-regulated environments.

Software & Data Management

The CHY-C2A integrates with Labthink’s proprietary ThicknessMaster v3.2 software suite, providing full audit trail functionality compliant with FDA 21 CFR Part 11. Software features include real-time thickness mapping with contour visualization, statistical process control (SPC) charting (X-bar/R, Cpk/Ppk), batch-level report generation with digital signature support, and export to CSV, PDF, or XML formats for LIMS integration. All raw data—including timestamp, operator ID, environmental conditions (optional external humidity/temperature input), pressure setpoint, and individual test results—are immutably logged with SHA-256 hashing. The system supports multi-user role-based access control (administrator, technician, reviewer) and automatic backup to network drives or cloud repositories via TLS 1.2 encrypted transfer.

Applications

• Quality control of ITO sputtering processes in display panel fabs—verifying uniformity across 8.5G+ glass substrates prior to patterning.
• In-line thickness verification of ceramic-coated separators in lithium-ion battery cell assembly lines.
• R&D evaluation of atomic layer deposited (ALD) metal oxide barriers on flexible OLED substrates.
• Regulatory testing of medical device packaging thickness per ISO 11607-1 for seal integrity validation.
• Thickness profiling of dry electrode coatings during solid-state battery development to correlate calendering pressure with porosity distribution.

FAQ

Is the CHY-C2A suitable for measuring thickness of soft hydrogel films?

Yes—when configured with the low-pressure mode (17.5 ± 1 kPa) and custom silicone-tipped probe, it can measure hydrated polymer films with minimal creep-induced error. Validation per ISO 10993-12 is recommended for biomedical use cases.
Can the instrument be integrated into a PLC-controlled production line?

Yes—it provides RS-232, RS-485, and Ethernet TCP/IP interfaces with Modbus RTU/TCP protocol support for seamless OEM integration and SCADA communication.
Does the system require annual recalibration?

Labthink recommends biannual verification using certified gauge blocks traceable to NIST or PTB standards; full recalibration is required every 24 months or after any mechanical impact event.
What is the minimum sample size for reliable measurement?

For 50 mm² contact area, the minimum supported dimension is 25 mm × 25 mm; smaller samples require custom fixturing to prevent edge deflection artifacts.
How does the CHY-C2A handle surface roughness effects?

The instrument reports arithmetic mean thickness over the defined contact area; for Ra > 0.5 µm surfaces, ISO 4593 recommends averaging ≥5 readings per location to mitigate topographical bias.