Electronic PCB Assembly Power Supply High Quality PCBA

Electronic PCB Assembly, or Printed Circuit Board Assembly (PCBA), is the complete process of mounting and soldering electronic components onto a bare PCB to create a functional electronic circuit. It transforms the fabricated board (with copper traces and pads) into a working module ready for integration into devices.

1. Component Sourcing - Procuring certified parts (resistors, ICs, connectors, etc.) from suppliers, often with traceability for quality control.
2. Solder Paste Application - A stencil printer applies solder paste (a mix of flux and tiny solder balls) precisely onto pads where components will sit.
3. Pick-and-Place - High-speed robotic machines place components onto the paste-covered pads, using optical alignment for micron-level accuracy (e.g., 0201 resistors, BGA chips).
4. Reflow Soldering - The board passes through a controlled oven with temperature zones (preheat, thermal soak, reflow, cooling) to melt the paste, forming permanent joints. Lead-free solder (e.g., SAC305) requires higher temperatures (240-250°C).
5. Inspection & Testing
   • AOI (Automated Optical Inspection): Cameras detect misaligned parts, solder bridges, or missing components.
   • X-ray: Checks hidden joints (e.g., BGAs).
   • ICT (In-Circuit Test): Probes test electrical continuity, resistance, and component values.
   • Functional Test: Validates the board under real-world conditions (e.g., firmware loading, signal integrity).
6. Through-Hole Assembly (if needed) - For components like electrolytic capacitors or connectors, manual or wave soldering inserts leads through drilled holes.
7. Conformal Coating & Final Assembly - Protective coatings (e.g., acrylic, silicone) shield against moisture/dust. Boards may then be integrated into enclosures with cables, heat sinks, etc.

SMT

• 13 automatic high-speed SMT line
• 5 million points / day
• FPC/Double sided mounted
• Automatic conformal coating

DIP

• 4 DIP line
• Post-soldering 700,000 points/day
• Professional DIP plug-in team

SMT Technology

• Min package: 01005
• Min pin: 0.3mm
• Min BGA pitch: 0.3 mm

PCBA OEM

• Full turnkey PCB assembly
• Partial turnkey PCB assembly