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DQS Electronic Co., Limited

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Electronic PCB Assembly Power Supply High Quality PCBA

MOQ : 1

Price : Inquiry Us

Payment Terms : T/T

Layer : 8 Layer

Material : FR4

Min. Component Size : 0201

PCB Thickness : 1.0mm

Pin Space : 0.1mm

Testing Method : Flying Probe, ICT, Functional Test,AOI

Application : Smart Home

Certifications : ISO9001, UL, RoHS

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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:

Component Sourcing
Procuring certified parts (resistors, ICs, connectors, etc.) from suppliers, often with traceability for quality control.
Solder Paste Application
A stencil printer applies solder paste (a mix of flux and tiny solder balls) precisely onto pads where components will sit.
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).
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).
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).
Through-Hole Assembly (if needed)
For components like electrolytic capacitors or connectors, manual or wave soldering inserts leads through drilled holes.
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

Item				Normal	Special
SMT Assembly	PCB(for SMT) specification	Length and Width( L* W)	Minimum	L≥3mm, W≥3mm	L＜2mm
		Length and Width( L* W)	Maximum	L≤800mm, W≤460mm	L ＞ 1200mm, W＞500mm
		Thickness( T)	Thinnest	0.2mm	T＜0.1mm
		Thickness( T)	Thickest	4 mm	T＞4.5mm
	SMT components specification	Outline Dimension	Min size	0201(0.6mm*0.3mm)	01005(0.3mm*0.2mm)
			Max size	200 * 125	200 * 125
			component thickness	T≤15mm	6.5mm＜T≤15mm
		QFP,SOP,SOJ (multi pins)	Min pin space	0.4mm	0.3mm≤Pitch＜0.4mm
		CSP/ BGA	Min ball space	0.5mm	0.3mm≤Pitch＜0.5mm
DIP Assembly	PCB specification	Length and Width ( L* W)	Minimum	L≥50mm, W≥30mm	L＜50mm
		Length and Width ( L* W)	Maximum	L≤1200mm, W≤450mm	L≥1200mm, W≥500mm
		Thickness( T)	Thinnest	0.8mm	T＜0.8mm
		Thickness( T)	Thickest	3.5mm	T＞2mm

♦ One-Stop Electronic Manufacturing Including

PCB Prototype	Quick Turn PCB	Single-Sided PCB	Double-Sided PCB	Multilayer PCB	Rigid PCB
Flexible PCB	Rigid-Flex PCB	Rigid-Flex PCB	Aluminum PCB	Metal Core PCB	Thick Copper PCB
HDI PCB	BGA PCB	High TG PCB	PCB Stencil	Impedance Control PCB	PCB Assembly
High-Frequency PCB	Bluetooth Circuit Board	Automotive PCB	USB Circuit Board	Halogen-Free PCB	Antenna PCB

♦ 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

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