PCB Long-Arm Thickness Gauge by Aisida

Overview

The Aisida PCB Long-Arm Thickness Gauge is a precision mechanical metrology instrument engineered for non-destructive, contact-based thickness measurement of rigid and semi-rigid planar substrates used in printed circuit board (PCB) manufacturing and quality assurance. It operates on the principle of high-resolution linear displacement sensing via a calibrated micrometer-style measuring spindle mounted on an extended-throat C-frame structure. The gauge is optimized for dimensional verification of copper-clad laminates (e.g., FR-4, polyimide), bare and finished PCBs, prepregs, solder masks, and other flat composite or metallic sheet materials. Its design prioritizes repeatability under ambient lab or production-floor conditions—delivering consistent sub-micron resolution without reliance on optical alignment or environmental stabilization. Unlike laser triangulation or ultrasonic systems, this mechanical gauge eliminates material-dependent signal attenuation and provides direct traceable dimensional output compliant with ISO 14253-1 (Geometrical Product Specifications — Inspection by measurement) and ASTM D1711 (Standard Terminology Relating to Electrical Insulating Materials).

Key Features

• Extended throat depth up to 300 mm—enables measurement of large-format PCB panels (up to 24″ × 36″) and edge-accessible areas without repositioning.
• High-accuracy analog-to-digital transduction system with 0.001 mm resolution and certified ±0.003 mm total error across full range (verified per ISO 9001 calibration protocol).
• Dual-unit display interface (mm/inch) with one-button toggle—supports mixed-unit documentation workflows common in global supply chains.
• Zero-reset functionality at any spindle position—facilitates differential thickness mapping (e.g., core vs. copper layer, surface warpage assessment).
• Optically flat, stress-relieved granite base (Grade 0 equivalent)—ensures long-term stability, minimal thermal drift (<0.5 µm/°C), and resistance to mechanical wear in high-cycle QA environments.
• Foot-switch actuation—reduces operator-induced parallax and hand tremor, improving measurement reproducibility (R&R < 1.8% per MSA AIAG 4th edition).
• Modular mounting points compatible with standard metrology benches and automated handling fixtures.

Sample Compatibility & Compliance

The gauge accommodates specimens ranging from 0.05 mm to 6.0 mm in nominal thickness, including multilayer boards with solder mask, ENIG, immersion silver, or OSP surface finishes. It supports both flatness-critical measurements (e.g., IPC-6012 Class 2/3 thickness tolerances) and localized thickness profiling across panel zones (center, edge, corner). All structural components comply with RoHS 2011/65/EU and REACH SVHC regulations. Calibration certificates are issued per ISO/IEC 17025-accredited laboratories and include uncertainty budgets traceable to NIM (China National Institute of Metrology). Device operation meets GLP documentation requirements when paired with optional SPC software.

Software & Data Management

The optional SPC module interfaces via USB 2.0 and supports real-time data streaming to Windows-based workstations. It enables automated batch logging, X-bar/R chart generation, Cp/Cpk calculation, outlier detection (using IQR or 3σ rules), and PDF report export compliant with FDA 21 CFR Part 11 (electronic signatures, audit trail, user access control). Raw measurement files are saved in timestamped CSV format with metadata (operator ID, sample ID, date/time, unit mode, zero offset). No cloud dependency—data remains on-premise for ITAR- or export-controlled environments.

Applications

• Final thickness verification of copper-clad laminates prior to inner-layer imaging.
• In-process monitoring of core thickness uniformity during lamination stack-up validation.
• Post-etch and post-plating thickness audits for controlled impedance layer compliance (IPC-2152).
• Quality gate inspection for HDI microvia substrate stacks and rigid-flex hybrid constructions.
• Supplier qualification testing per IPC-A-600 and IPC-6012 acceptance criteria.
• Process capability studies supporting PPAP submissions in automotive electronics (IATF 16949).

FAQ

Is calibration certification included with purchase?
Yes—a factory calibration certificate with measurement uncertainty statement is provided. Annual recalibration is recommended and supported via Aisida’s ISO/IEC 17025-certified service centers in Shenzhen and Shanghai.
Can the gauge measure curved or warped PCBs?
It is designed for flat or mildly warped specimens (<0.3 mm deviation over 100 mm). For highly warped boards, use in conjunction with a precision surface plate and dial indicator for reference leveling.
Does the SPC software support statistical alarms and email notifications?
Yes—configurable threshold alerts trigger local audio/visual signals and optional SMTP-based email dispatch to designated QA personnel.
What maintenance is required for long-term accuracy?
Monthly cleaning of the spindle and anvil surfaces with isopropyl alcohol; annual verification of granite base flatness using Grade 0 straightedge and feeler gauges.
Is technical support available in English for international customers?
Yes—Aisida provides remote diagnostics, English-language operation manuals, and video-based training modules accessible via secure customer portal.