Witness the structured journey from raw materials to finished products. We have established standardized operating procedures covering key stages: SMT placement, DIP insertion, soldering, testing, aging, and packaging. Multiple inspection points (including testing in our Reliability Laboratory) ensure process control, reliable quality, and full traceability.
Incoming Quality Control (IQC)
Inspects quality of all purchased components and PCBs.
Solder Paste Printing
Applies solder paste onto PCB pads.
Solder Paste Inspection (SPI)
Automatically checks solder paste printing quality (volume, area, offset).
Surface Mount Technology
(SMT) Placement
Precisely mounts SMD components onto PCB at high speed.
Reflow Soldering
Melts solder paste to form solder joints for SMD components.
Automated Optical Inspection
(AOI)
Checks placement accuracy, polarity, and solder quality of SMD components.
Automatic Insertion (AI) /
Axial/Radial Insertion
Machine-inserts through-hole components with axial/radial leads.
Manual Insertion /
Components Plug-in
Hand-inserts irregularly shaped, large, or non-auto-insertable components (e.g., connectors, large capacitors, heat sinks).
Wave Soldering
Solders leads of through-hole components.
Cleaning (Flux Residue Removal)
Removes flux residues after wave soldering (critical for high-reliability or conformal-coated products).
Solder Joint / Visual Inspection
Visually inspects wave-soldered joints and overall appearance (bridging, cold joints, missing parts, component damage), typically post-cleaning or wave soldering.
In-Circuit Test (ICT)
Tests component values, connectivity, shorts/opens using a bed-of-nails fixture.
Quality Control Test (QC Test) /
Functional Test
Initial functional test verifying basic board operation (e.g., power, key signals). May require test point access.
Rework Station
Repairs defects found by AOI, visual inspection, ICT, or QC Test.
Burn-in Test / Environmental
Stress Screening (ESS)
Operates boards under power with thermal, humidity, or voltage stress to screen early failures (critical for industrial/automotive)
Final Functional Test (FCT)
Comprehensive functional test simulating real-world conditions to verify all specifications. Requires loads/signal sources.
Rework Station (Again)
Repairs defects found during Burn-in and FCT
Final Visual Inspection (FVI)
Final pre-coating comprehensive visual inspection.
Apply Conformal Coating
Sprays protective coating ONLY on confirmed-good boards after all testing / rework / cleaning. (Position adjusted to post-all-testing!)
Coating Curing & Inspection
Ensures uniform coverage, no bubbles/skips, and proper curing.
Packing
Packs finished boards using ESD-safe materials.
Quality Assurance (QA) Audit /
Sampling Inspection
Randomly samples packed units for final verification (appearance, documentation, occasional retest).
Finished Goods Warehouse
Stores approved products for shipment.