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DQS Electronic Co., Limited

  • China,Shenzhen
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China Electronics SMT PCB SMD Assembly Components 12 Layer OEM
China Electronics SMT PCB SMD Assembly Components 12 Layer OEM

  1. China Electronics SMT PCB SMD Assembly Components 12 Layer OEM

Electronics SMT PCB SMD Assembly Components 12 Layer OEM

  1. MOQ: 1
  2. Price: Contact us
  3. Get Latest Price
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 Electronic Products
Certification ISO, UL, IPC, Reach
Place of Origin China

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  1. Product Details
  2. Company Details

Product Specification

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 Electronic Products
Certification ISO, UL, IPC, Reach Place of Origin China
High Light 12 Layer pcb smd assemblyOEM pcb smd assemblyOEM smt pcb assembly


12 Layer Industrial Control SMT PCB Assembly



♦ What Is Electronics PCB Components Assembly?


​​Electronics PCB Components Assembly​​ (also called ​​PCBA – Printed Circuit Board Assembly​​) is the process of mounting and soldering electronic components onto a bare PCB to create a functional circuit board. This process transforms a blank PCB into a working electronic device, such as a smartphone, computer, or IoT gadget.




Key Stages of PCB Components Assembly​:​

​​

1. Component Selection & Procurement​​

    • ​​Passive Components​​ (resistors, capacitors, inductors)
    • ​​Active Components​​ (ICs, transistors, diodes)
    • ​​Electromechanical Parts​​ (connectors, switches, relays)

​​2. PCB Assembly Methods​​

There are two primary assembly techniques:

​​A. Surface-Mount Technology (SMT) Assembly​​

    • Components are placed directly onto PCB pads.
    • ​​Process Steps:​​
      1. ​​Solder Paste Application​​ (using a stencil)
      2. ​​Pick-and-Place Machine​​ (automated component placement)
      3. ​​Reflow Soldering​​ (melts solder paste in an oven)
    • ​​Best for:​​ High-density, compact designs (e.g., smartphones, laptops).

​​B. Through-Hole Technology (THT) Assembly​​

    • Components have leads inserted into drilled holes.
    • ​​Process Steps:​​
      1. ​​Manual/Automated Insertion​​ of components
      2. ​​Wave Soldering​​ (solder flows over the board)
    • ​​Best for:​​ High-power, durable applications (e.g., industrial equipment, automotive).

​​C. Mixed Assembly (SMT + THT)​​

    • Combines both methods for complex designs.

       ​​3. PCB Assembly Process Flow​​

Step Description
​1. Solder Paste Printing​ A stencil applies solder paste to PCB pads.
​2. Component Placement​ Pick-and-place machines position SMD components.
​3. Reflow Soldering​ Heats PCB to melt solder and form connections.
​4. Through-Hole Insertion​ THT components are manually/machine-inserted.
​5. Wave Soldering (THT)​ Solder bonds THT components to the board.
​6. Inspection & Testing​ AOI (Automated Optical Inspection), X-ray (for BGAs), functional testing.
​7. Conformal Coating (Optional)​ Protects PCB from moisture, dust, and corrosion.




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

Maximum

L≤800mmW≤460mm

L > 1200mmW>500mm

Thickness( T)

Thinnest

0.2mm

T<0.1mm

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

Maximum

L≤1200mm, W≤450mm

L≥1200mmW≥500mm

Thickness( T)

Thinnest

0.8mm

T<0.8mm

Thickest

3.5mm

                      T>2mm





♦ Application Fields



Intelligent Industrial Control Equipment Prototype PCB Assembly 3
PCBA Prototype Industrial Control PCBA Telecom PCBA Medical PCBA
Intelligent Industrial Control Equipment Prototype PCB Assembly 4 Intelligent Industrial Control Equipment Prototype PCB Assembly 5 Intelligent Industrial Control Equipment Prototype PCB Assembly 6 Intelligent Industrial Control Equipment Prototype PCB Assembly 7
Automotive PCBA Consumer Electronic PCBA LED PCBA  Security PCBA





♦ Advantages of DQS Team

  1. 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


Company Details

Bronze Gleitlager

,

Bronze Sleeve Bushings

 and 

Graphite Plugged Bushings

 from Quality China Factory
  • Business Type:

    Manufacturer

  • Employee Number:

    >800

  • Ecer Certification:

    Verified Supplier

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 produ... 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 produ...

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Get in touch with us

  • Reach Us
  • DQS Electronic Co., Limited
  • Yasen Industrial Park, Baolong Street, Longgang District, Shenzhen
  • https://www.pcbs-board.com/

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