Zhengye XK32A Automated PCB Line Width Measurement System

Overview

The Zhengye XK32A Automated PCB Line Width Measurement System is an industrial-grade optical metrology platform engineered for high-precision, non-contact dimensional analysis of printed circuit board (PCB) features during mid-process fabrication. It operates on the principle of high-resolution digital imaging metrology: a calibrated coaxial telecentric optical system—comprising a monochrome CMOS sensor, adjustable LED ring illumination, and precision Z-axis stage—captures orthographic top-down images of PCB substrates immediately after etching and prior to solder mask application. The system measures critical geometric parameters—including trace upper width, lower width, line-to-line spacing (pitch), circular via diameters (within field-of-view), and gold finger linewidth—by sub-pixel edge detection algorithms compliant with ISO 10110-5 and IPC-TM-650 2.2.14 standards. Designed specifically for 5G RF multilayer boards, HDI structures, and fine-pitch rigid-flex assemblies, the XK32A delivers repeatable measurements at ≤±0.5 µm uncertainty under controlled environmental conditions (23 ±1°C, 50 ±5% RH), supporting process capability analysis (Cp/Cpk) and SPC integration.

Key Features

• Fourth-generation hardware architecture featuring dual-stage motion control (X-Y linear motor + Z piezo focus) for <100 nm positional repeatability
• Integrated telecentric lens system (0.1×–5× magnification range) with automatic focus calibration and distortion correction
• Real-time image acquisition at ≥30 fps (full FOV) with 12-bit dynamic range and hardware-triggered synchronization
• Multi-threshold edge detection engine supporting simultaneous measurement of asymmetric trace profiles (upper/lower width differential)
• Embedded environmental monitoring module (temperature, humidity, vibration) logged with each measurement record for GLP traceability
• Ruggedized industrial enclosure rated IP54, compatible with cleanroom Class 10,000 environments

Sample Compatibility & Compliance

The XK32A accommodates standard PCB panel sizes up to 610 mm × 610 mm (24″ × 24″) with optional vacuum chuck or pin-array fixturing. It supports copper-clad FR-4, polyimide, ceramic, and metal-core substrates with surface finishes including ENIG, immersion silver, OSP, and hard gold. All measurement algorithms are validated per IPC-A-600 and IPC-6012 requirements for Class 2 and Class 3 PCBs. System validation documentation includes as-found/as-left calibration reports traceable to NIST-certified step gauges and certified reference materials (CRMs). The platform complies with CE Machinery Directive 2006/42/EC, RoHS 2011/65/EU, and meets electromagnetic compatibility requirements per EN 61326-1:2013.

Software & Data Management

The proprietary Zhengye VisionMetro™ v4.2 software provides full audit trail functionality compliant with FDA 21 CFR Part 11 (electronic signatures, role-based access control, immutable log history). Measurement data is stored in SQLite3 database format with automated daily backup and configurable export to CSV, XML, or PDF reports—including statistical summaries (mean, σ, min/max, histogram, trend charts). The software supports direct integration with MES platforms via OPC UA and offers RESTful API endpoints for custom SPC dashboard development. Calibration certificates, operator IDs, equipment IDs, and environmental logs are embedded in every exported dataset to satisfy ISO 9001:2015 clause 7.1.5.2 requirements for monitoring and measuring resource verification.

Applications

• In-line verification of etch uniformity and undercut ratio on inner/outer layer panels pre-solder mask
• Process window qualification for advanced lithography tools (e.g., laser direct imaging systems)
• Root cause analysis of trace narrowing or bridging defects in high-frequency 5G mmWave PCBs
• First-article inspection (FAI) reporting per AS9102 requirements for aerospace PCB suppliers
• Supplier qualification audits requiring documented measurement uncertainty budgets per GUM (JCGM 100:2008)
• Training and certification of QC technicians using standardized measurement SOPs aligned with IPC-WP-019

FAQ

What is the minimum measurable line width supported by the XK32A?
The system achieves reliable sub-micron resolution down to 3 µm nominal line width under optimal lighting and contrast conditions, with measurement uncertainty increasing gradually below 5 µm due to diffraction limits inherent to visible-light optical metrology.
Does the XK32A support automated pass/fail decision logic based on IPC-defined tolerances?
Yes—the software allows user-defined tolerance bands per feature type (e.g., ±10% for Class 3 outer layers per IPC-6012 Table 7-1), with real-time OK/NG flagging and configurable alarm outputs (digital I/O, email, MES notification).
Can measurement data be exported directly to Minitab or JMP for statistical process control?
All raw coordinate data and summary statistics export natively to CSV with column headers conforming to Minitab’s worksheet import schema; batch export supports timestamped folder structures for automated script ingestion.
Is remote diagnostics and firmware update capability available?
The system includes secure TLS 1.2-enabled remote maintenance mode, allowing authorized engineers to perform diagnostic routines, log analysis, and over-the-air firmware updates without physical access—subject to customer network security policy approval.