Liqian Intelligent SMT Laser Marking Machine: Enabling High-Precision "One Item, One Code" Traceability for PCB/FPC

In modern electronics manufacturing, achieving high quality and full traceability requires "one item, one code" precision marking on PCBs and FPCs. The LiQ Series SMT Laser Marking Machine from Suzhou Liqian Intelligent Technology is specifically engineered to meet this critical need.

Core Advantages: Why Choose the Liqian SMT Laser Marker?

High-Precision Cold Processing

Utilizing a 355nm ultraviolet laser "cold light source," it produces minimal heat-affected zones. This makes it ideal for heat-sensitive materials like PCBs, FPCs, plastics, ceramics, and metals, making it the perfect choice for demanding sectors like automotive and medical devices.

Permanent and Clear Marking

By using a laser to alter the material's surface physically or chemically, the marks are friction-resistant, heat-resistant, and permanent. They easily withstand high/low-temperature cycling, vibration, and aging tests.

High Flexibility and Low Operating Cost

As a non-contact process, it requires no consumables like ink or solvents, resulting in simple maintenance. Combined with computer control, graphics and text can be changed instantly, offering fast development cycles and high flexibility.

 Technical Highlights

Vision Positioning & Online Decoding

Equipped with a dual-CCD vision system, it automatically corrects board placement deviations to ensure precise marking. It also supports online decoding and grading for real-time quality inspection.

High-Speed Galvanometer & Fine Detail

Featuring a high-speed digital galvanometer, it marks a single board in seconds without slowing down the production line. It achieves ultra-fine details with a minimum line width of 0.1mm and a repeatability of ±0.001mm, meeting the demands of high-density QR codes.

Online/Offline Deployment

The system can be seamlessly integrated into an SMT production line for inline operation or function as a standalone offline unit, offering flexible deployment options.

Deep MES System Integration

It can automatically upload marking data (e.g., serial numbers, QR code content) to MES/ERP systems, enabling full-process traceability from raw materials to finished products, satisfying audit requirements for standards like IATF16949 and ISO.

Typical Model Specifications

Taking the Liqian Intelligent SMT Laser Marker (UV Laser) as an example, its typical configuration is as follows:

Specifications:

Device Dimensions: Length 100cm x Width 180cm x Height 160cm

Power Supply: Stable voltage 2.5KW; AC 220V (±10%)

Air Pressure: ≥0.5MPa

Device Weight: 750KG

PCBA Size: 50 * 50mm (min) to 500 * 400mm (max)

Vision System: Dual CCD MARK point positioning + Online decoding + Grading

Operating System: Windows 10

Computer: Industrial PC with Intel i7 processor, 16GB RAM, 1TB SSD

Laser Type: UV (Ultraviolet) preferred / CO2 (Carbon Dioxide)

Laser Power: 5W

Laser Wavelength: 355nm

Engraving Speed: <7000mm/s

Minimum Line Width: 0.1mm; Repeatability: ±0.001mm

Minimum Code Size: 1.5 x 1.5mm

Double-sided Marking: Supported / Optional

Board Loading Direction: L-R (Left-to-Right, default) / R-L (Right-to-Left)

Cooling Method: Independent water cooling system

Fume Extraction: Automatic purification system

Operating System

Windows 10 (Industrial PC: i7/16GB/1TB SSD)

Note: Specific configurations can be customized based on customer product dimensions, marking content, and production capacity requirements.

 Typical Application Scenarios

PCB/FPC Traceability: Engraving unique QR codes on the board surface or edge to enable full lifecycle traceability.

Component-Level Marking: Precisely marking BGAs, QFNs, and other components for easier rework and anti-counterfeiting.

Structural Parts/Enclosure Marking: Marking model numbers, dates, etc., on connectors, heat sinks, and housings to enhance brand recognition.

Process & Defect Marking: Marking defect locations or batch information on PCBs to assist in process analysis and optimization.

A Complete Smart Factory Solution

Liqian's strength lies in providing an integrated closed-loop solution covering "Error-Proofing → Inspection → Marking → Traceability." At the 2026 Productronica China exhibition, Liqian demonstrated this complete workflow:

Error-Proofing Material Check → Fully Automated First Article Inspection → Laser Marking & Coding → MES Data Traceability

This "combo" solution helps factories achieve comprehensive improvements in efficiency, yield, and quality at a lower overall cost. If you are planning to upgrade your SMT production line, starting with Liqian's complete solution is the most efficient way to build the foundation of your smart factory.