Quality Assurance Diagram
At Lin Horn Technology, quality assurance is an integral part of our in-house PCB manufacturing operations. From incoming materials to final shipment, quality control is implemented at every stage of the production process to ensure consistency, reliability, and traceability.
Our quality system is built on standardized operating procedures, defined inspection checkpoints, and disciplined process control. By integrating quality management into daily manufacturing activities, we are able to maintain stable production performance and deliver PCBs that meet customer specifications and industry requirements.
Inner Layer
Key Control Points：Trace & Line Width, Spacing, Impedance Control
- Trace & Impedance Measurement Instrument
- AOI (Automatic Optical Inspection)
- VRS System (Vision Recognition System)
Lamination
Key Control Points：Lamination Thickness Control
- Laser Thickness Instrument
Drilling
Key Control Points：Drilling Accuracy
- Hole AOI
- X-Ray Inspection Machine
Outer Layer
Key Control Points：Trace & Line Width, Spacing, Impedance Control
- Trace & Impedance Measurement Instrument
- AOI & VRS System
Plating (PTH)
Key Control Points：Copper Thickness Control
- CMI Copper Thickness Instrument
- Micro-section Analysis
Solder Mask (PSR)
Key Control Points：Solder Mask Thickness Control
- S/M Thickness Measurement Instrument
Routing (CNC)
Key Control Points：Dimensional Accuracy
- 2.5D Coordinate Measuring Machine
Electrical Test
Key Control Points：Electrical Testing (Open & Short)
- O/S Tester
- Flying Probe Testing Machine
Hole & Bow/Twist Inspection
Key Control Points：Via Quality, PCB Flatness
- Hole & B/W Inspection Equipment
Final Quality Control
Key Control Points：Visual Defect Inspection
- Automatic Visual Inspection Machine
- Video Microscope
- Manual Visual Inspection
Outgoing Quality Control
Key Control Points：Reliability Test & Surface Finish Thickness
- Metallurgical Microscope
- Ionic Contamination Instrument
- X-Ray Fluor-escence Film Thickness Machine
Packing
Key Control Points：Packing method & barcode information
- Barcode Machine