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FR4 Surface Mount SMD PCB SMT Assembly Circuit Board 2.5mm Immersion Gold

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FR4 Surface Mount SMD PCB SMT Assembly Circuit Board 2.5mm Immersion Gold

Certification : ISO, UL, IPC, Reach

Place of Origin : China

MOQ : 1

Price : Contact us

Payment Terms : T/T

Delivery Time : 5-30 days

Layer : 12 Layer

Material : FR4

Board Thickness : 2.5mm

Surface Finish : Immersion Gold

Pin Space : 0.25mm

Application : Industrial Control

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Medical Mother Board and SMT SMD PCB Assembly

♦ What Is SMT Assembly?

SMT Assembly (Surface Mount Technology Assembly) is a modern method of mounting electronic components directly onto the surface of a printed circuit board (PCB). It is the most widely used PCB assembly technique today, replacing traditional through-hole technology (THT) in most applications due to its efficiency, precision, and ability to support miniaturized and high-density designs.

♦ What Is SMD?

An SMD is an electronic component designed specifically for surface mounting (SMT). These components have small metal pads or terminations instead of long leads.

Types of SMD Components:

Component	Example	Package Type
Resistors	0603, 0805, 1206	Chip resistors
Capacitors	MLCC, Tantalum	Small rectangular chips
ICs (Integrated Circuits)	QFP, BGA, SOIC	Fine-pitch, ball grid arrays
Diodes & Transistors	SOD-123, SOT-23	Small 3-pin packages

♦ Common Challenges in SMT/SMD Assembly:

Solder Bridging (unwanted connections between pads)
Tombstoning (one end of a component lifts during soldering)
Misalignment (components shift before reflow)
Voiding in BGA Soldering (air gaps in solder joints)

Solutions:
✔ Proper stencil design (for accurate solder paste application)
✔ Reflow profile optimization (temperature control)
✔ AOI & X-ray inspection (for defect detection)

DQS Electronic Group is one of the leading EMS company in China, we provide PCB design, PCB manufacturing, PCB assembly service and testing. Welcome send us your Gerber file to get free quotation. Our email: sales@dqspcba.com

♦ Technical Parameters

PCB Assembly Capability
Item				Normal	Special
SMT Assembly	PCB(used 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

♦ Application Fields


PCBA Prototype	Industrial Control PCBA	Telecom PCBA	Medical PCBA

Automotive PCBA	Consumer Electronic PCBA	LED PCBA	Security PCBA

♦ Advantages of DQS Team

On-time Delivery:

- Owned PCBA factories 15,000 ㎡
- 13 fully automatic SMT lines
- 4 DIP assembly lines

2. Quality Guaranteed:

- IATF, ISO, IPC, UL standards
- Online SPI, AOI, X-Ray Inspection
- The qualified rate of products reach 99.9%

3. Premium Service:

- 24H reply your inquiry
- Perfect after-sales service system
- From prototype to mass production

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