Electronic PCB Assembly Power Supply High Quality PCBA

Electronic PCB Assembly Power Supply High Quality PCBA

♦ What is Electronic PCB Assembly?

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.

Key Stages of PCB Assembly:

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.

♦ DQS's PCB Assembly Capability

♦ One-Stop Electronic Manufacturing Including

♦ Core Competencies of DQS PCB Assembly

SMT		DIP
13 automatic high-speed SMT line 5 million points / day FPC/Double sided mounted Automatic conformal coating		4 DIP line Post-soldering700,000 points/day Professional DIP plug-in team
	SMT Technology		PCBA OEM
	Min package: 01005 Min pin: 0.3mm Min BGA pitch: 0.3 mm		Full turnkey PCB assembly Partial turnkey PCB assembly

DQS Electronic is located in Shenzhen, focusing on PCB Layout Design, PCB Fabrication, Electronic Components Sourcing, SMT, PCB Assembly and Testing. We are a one-stop EMS electronic manufacturing company committed to providing global customers with rapid prototyping and mass production.

Our products include single, double, multi, high frequency, aluminum base, copper base, FR-4 and other high precision circuit boards.

We have over 10 years of experience in serving many domestic and foreign brand customers in a wide range of fields such as Medical, Automotive, Industrial Automation, Artificial Intelligence, Smart Home, Security, Power and Communications, etc..