Precision SMT PCB Assembly –
From Prototype to Mass Production
One-Stop PCBA Solutions for Global Clients | ISO 9001 & UL Certified • Factory Direct Price
Get Instant Quote →What is SMT Assembly?
SMT assembly (Surface Mount Technology) is a type of manufacturing method in which electronic components are mounted directly onto the surface of a printed circuit board (PCB). In contrast to throught-hole technology that requires drilling holes, SMT PCBA makes use of smaller and faster components that are placed on the outsite of the board, enabling high circuit density, superior reliability, and streamlined automated production for complex PCB designs.
As a manufacturer-trading integrated PCBA company, we eliminate middlemen, offering direct factory pricing while ensuring full transparency from components to finished PCBA.
Integrated Manufacturing & Trade
We aren't just a SMT assembly service provider; we see ourselves as your manufacturing partner. We own a cutting-edge PCBA manufacturing factory and offer you:
- Direct factory pricing (without any markups)
- Feel free to conduct on-site audits at the facility
- Total control over Bill of Materials and production quality
- Easy scaling from prototype to large-volume production
Top-tier SMT PCB Assembly Supplier - FS Technology
One-Stop PCB&PCBA
There's no middleman between PCB and PCBA, and you can get the direct factory price.
100% Quality Control
Strict inspection&testing including AI-3D-AOI, X-ray, ICT, FAT, functional test, and various physical tests.
Certification Compliance
Compliant with UL, IPC, and RoHS standards, BSCI certified, and meet ISO 9001, ISO 14001, ISO 45001, ISO 13485, and IATF 16949.
Automated SMT line
Equipped with high-precision automated equipment, including AGV robots, intelligent solder paste cabinets, etc.
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SMT Manufacturing Capabilities
The entire SMT workshop is built to constant temperature and humidity, and dust-free standards. It is equipped with an information management data dashboard, enabling visualization of production status, ESD data, and the real-time operating status of each production line. In 2026, SMT material handling robots (AGVs) and automatic flipping machines were added to enhance production automation capabilities and achieve highly automated SMT production.
| Min. Component Size | 0201, 01005 mass production capable |
|---|---|
| PCB Board Size | 510 * 590 * 20mm (Max) & 0.25"x0.25" (Smallest) |
| Placement Accuracy | ±0.035mm (CPK≥2.0) (High precision) |
| Mountable Components Size | 0.6mm*0.3mm--12*12mm square components |
| Max. Production Capacity / Month | Up to 325 million |
| BGA Reballing & Rework | Professional BGA rework station, supporting 0.3mm fine-pitch BGA |
| High-Speed SMT Lines | Panasonic's 2+1 high-speed combination |
|---|---|
| Reflow Soldering | 10-Zone Nitrogen (N2) Reflow Ovens |
| 3D SPI (Solder Paste) | 3D SPI for 100% paste volume & shape inspection |
| AI-3D-AOI (Automated Optical) | 3D AOI for pre/post-reflow defect detection |
| X-Ray Inspection | Scienscope High-Res X-Ray for BGA, QFN void & short analysis |
| First Article Test | Bluiris First Article Inspector (FAI) system for component model, polarity, LCR parameters, etc. |
| Ion dust Removal Machine | Utilizes ion air to eliminate static electricity on PCBs and remove surface dust, lint, and fine particles. |
| Intelligent Solder Paste Cabinet | Digital and standardized one-stop management of the entire process of solder paste storage, rewarming, mixing, recycling and disposal. |
| Flexible PCB (FPC) | FPC SMT assembly with specialized fixtures and tension control |
|---|---|
| Rigid-Flex PCB | Complex assembly for Rigid-Flex combination boards |
| Selective Soldering | Precision automated selective soldering for mixed-technology boards |
| Conformal Coating | Automated spraying lines for environmental protection (moisture/dust) |
SMT Factory Production Line Equipments
CERTIFICATIONS & COMPLIANCE
IPC-A-610
Class 2/3
ISO 9001
Quality Mgt
ISO 13485
Medical
IATF 16949
Automotive
BSCI
Social Compliance
RoHS / REACH
Eco-Friendly
SMT Assembly Service Process
Step 1: Incoming Quality Control (IQC)
Thorough inspection of all electronic components and bare PCBs before they are allowed into the warehouse to prevent any defective materials from entering the SMT production line.
Step 2: Solder Paste Printing
Automatic solder paste printing machines precisely apply the right amount of paste to the PCB pads through laser-cut stencils.
Step 3: Solder Paste Inspection (SPI)
100% 3D SPI continuously monitors the volume, height, and orientation of the solder paste. This significant step eliminates 70% of the possible soldering faults.
Step 4: High-Speed Placement
Advanced NPM machines pick and place components (down to 01005 size) onto the solder paste with extreme speed and optical precision.
Step 5: Reflow Soldering
Boards runs through a 10-zone Nitrogen reflow oven where a tightly controlled thermal profile is used to melt the paste resulting in excellent, reliable solder joints.
Step 6: Automated Optical Inspection (AOI)
In-line 3D AOI systems use optical scan to check the board for missing components misalignment tombstones, and solder bridge defects.
Step 7: X-Ray Inspection
High-resolution X-Ray machines are used to check hidden solder joints under BGAs, QFNs, and complex ICs to make sure that the connections are void-free.
Step 8: PCBA Cleaning
The boards are cleaned thoroughly using ultrasonic or spray cleaning systems to remove flux residues, thus reaching a high level of reliability over time.
Common Defects In SMT Electronic Assembly
The SMT PCB assembly process requires a high level of accuracy and close control. Nevertheless, different problems that may lead to impacting the board's performance can come up. Besides, in order to find out and fix the potential problems correctly, it may require a professional SMT service provider.
Insufficient Solder
Inadequate application of solder paste lessens the strength of the bonding connection and makes the overall solder joint weaker.
Component Misalignment
Even the tiniest shifting during pick and place, or reflow stages may lead to faulty solder joints and components misalignment.
Solder Balling
The tiniest solder balls are formed and they may cause shorting circuits or lead to the boards being unreliable.
Tombstoning
Small components become erect on their pads because of uneven heating leading to open solder joints.
Open Circuits
Poor soldering results in broken tracks which in turn causes loss of electrical continuity on the PCB.
Short Circuits
Excessive solder bridging between close pads leads to functional failures immediately.
Thermal Stress
Excessive reflow temperatures or incorrect profiles damage sensitive components or PCB layers.
False AOI Calls
Automated checks might report good joints as faulty and need to be double-checked manually.
Advanced Defect Inspection & Rework Solutions
Hinged around premium 3D AOI, X-Ray and FCT equipment, we are able to trace defects immediately. Our certified engineers use BGA rework stations to save and repair complex mounted assemblies. A distinct barcode is assigned to each PCB, which is connected to our traceability system for detailed repair reporting and verification of reliability.
Get Professional SMT Service
info@fs-pcba.com
SMT Quality Assurance
Smart Storage
Temp & Humidity Controlled
100% Traceable
Barcode & MES Tracking
Nitrogen Soldering
Ensure Solder Joint Quality
AOI & X-Ray
100% Defect Inspection
Reliability Lab
Thermal & Aging Tests
Live Yield Data
Real-time Production Stats
Our Success in SMT Assembly
Automotive BMS PCBA Production
IATF 16949 compliant PCBA with 0 DPPM over 300k units. Improved thermal cycling results by 30% through advanced void-free reflow profiling.
Critical Medical CGM Assembly
Class 3 IPC assembly featuring full 3D X-Ray and functional testing. Achieved 48h turnaround during critical demand periods without compromising quality.
Complex Industrial Control Board
High-mix low-volume production with complex BGA components. Achieved 98.5% first-pass yield after implementing our pre-production DFM optimization.
Global Logistics & Partner Support
Worldwide Shipping
Seamless DDP & DAP services globally. We partner with top couriers (DHL/FedEx) for fast delivery. Fully transparent pricing with zero hidden fees.
Local Account Management
Dedicated English-speaking account managers providing 24/7 responsiveness, seamless timezone overlap, and robust after-sales technical support.
Get Quote in 24h — Fast & Reliable
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SMT Assembly FAQs
Absolutely! With over 20 years of experience in the PCBA industry, FS Technology has consistently provided high-quality services and established itself as a trusted name in the Chinese PCBA industry. If you are learning about us for the first time, consider checking out our customer reviews!
Unlike other manufacturers, FS Technology prioritizes service and quality. We do not recommend obtaining PCBA directly through online quotes. Instead, we tailor service projects for our clients after receiving their emails. This approach strengthens our mutual understanding and helps reduce your project costs. If you need an SMT manufacturing quote, simply contact us via email (info@fs-pcba.com) – it’s that simple!
The global manufacturing industry is shifting towards China, and if you need offshore manufacturing, China is a good direction to consider. China SMT assembly services attract customers with a match of quality and price. It is believed that most companies can meet your requirements and consistently adhere to international certification standards!
If your business excels in marketing, then Turnkey PCBA solutions will be your best option. You can focus solely on your strengths, and as for other tasks, FS Technology will take care of everything for you. For projects that prioritize cost, it is recommended to use a semi-turnkey approach!
Automation is the future mainstream trend, aiding in mass production and avoiding human errors. Therefore, FS Technology is increasing its investment in equipment, committed to building a digitally intelligent factory to achieve the automation of SMT circuit board assembly.
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Contact Info
Email Us
info@fs-pcba.com
Call Us
+86-13715307049
Address
Building 4, Fuqiao Industrial Zone, No. 79, Tianfu Road, Fuhai Street, Bao’an District, Shenzhen