PCBA Circuit Boards Manufacturer Fabrication WiFi Consumer Electronics
♦ What Is PCB Assembly Service?
PCB Assembly Service refers to the process of assembling electronic components onto a printed circuit board (PCB) to create a functional electronic device. It involves several stages, from sourcing components to soldering and testing the final product.
♦ Key Steps in PCB Assembly:
PCB Fabrication:
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- The bare PCB is manufactured with copper traces, pads, and layers based on the design file (Gerber file).
Component Sourcing (Procurement):
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- Components (resistors, ICs, capacitors, etc.) are sourced based on the Bill of Materials (BOM).
- Can include surface-mount (SMD) and through-hole (THT) components.
Solder Paste Application:
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- For SMD components, solder paste is applied to PCB pads using a stencil.
Pick-and-Place Machine:
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- Automated machines place SMD components onto the PCB with high precision.
Reflow Soldering:
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- The PCB passes through a reflow oven, melting the solder paste to form secure electrical connections.
Through-Hole Component Insertion (if needed):
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- THT components are inserted manually or via automated insertion machines.
Wave Soldering (for THT):
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- The PCB passes over a wave of molten solder to attach THT components.
Inspection & Testing:
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- AOI (Automated Optical Inspection) checks for defects.
- Functional Testing ensures the assembled PCB works as intended.
Final Cleaning & Packaging:
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- Flux residues are cleaned, and the PCB is prepared for shipment.
♦ Types of PCB Assembly Services:
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- Turnkey PCB Assembly: Full service (PCB fabrication + component sourcing + assembly).
- Partial (Consignment) Assembly: Customer provides components; the assembler handles soldering.
- Prototype Assembly: Low-volume assembly for testing designs.
- High-Volume Production: Mass production for commercial devices.
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: info@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≤800mm, W≤460mm | L ＞ 1200mm, W＞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≥1200mm, W≥500mm |
| Thickness( T) | Thinnest | 0.8mm | T＜0.8mm |
| Thickest | 3.5mm | T＞2mm |
♦ Application Fields
♦ Advantages of DQS Team
- On-time Delivery:
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- Owned PCBA factories 15,000 ㎡
- 13 fully automatic SMT lines
- 4 DIP assembly lines
2. Quality Guaranteed:
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- IATF, ISO, IPC, UL standards
- Online SPI, AOI, X-Ray Inspection
- The qualified rate of products reach 99.9%
3. Premium Service:
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- 24H reply your inquiry
- Perfect after-sales service system
- From prototype to mass production
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