SMT
Advanced automation and exceptional precision solutions capable of significantly boosting production efficiency and minimizing human error.
-
Ready-to-use SMT parts – 01005 to large connectors
-
Authorized, genuine components
-
Fast Turnaround 1–5 day assembly
-
Fine-pitch (0.4mm) & BGA assembly with X-Ray inspection
-
Closed-loop solder paste inspection (SPI) & reflow profiling
-
Fast changeover – ideal for prototypes & small batches (no MOQ)
Industry-Leading Assembly Precision
Our SMT services combine state-of-the-art automation with expert engineering to deliver high-precision, rapid-turnaround PCB assembly for contemporary electronics.
99.3%
On-Time Delivery Rate
State-of-the-art SMT lines for swift and adaptable prototype manufacturing.
Advanced equipment ensuring unmatched technical performance and integrity.
Meticulously organized, clean, and secure environment for final assembly.
Extensive on-site component library to significantly accelerate build cycles.
Dedicated stations for precision BGA, Infrared (IR), and through-hole rework.
High-resolution AOI and 20x microscopy for rigorous quality inspection.
Overview of the SMT Process Steps
Experience the pinnacle of manufacturing efficiency with our streamlined SMT process, designed to accelerate your innovation from prototype to production.
| Step | Process Name | Description |
| 01 | Solder Paste Application | Stencil printing deposits precise amounts of solder paste onto designated PCB contact pads. |
| 02 | Component Placement | Automated pick-and-place machines retrieve surface-mount devices (SMDs) and accurately position them onto the solder paste-coated pads. |
| 03 | Reflow Soldering | Boards pass through a controlled thermal oven, melting the solder paste to form permanent electrical and mechanical connections. |
| 04 | Automated Optical Inspection (AOI) | Vision systems verify component presence, placement accuracy, polarity, and basic solder joint quality post-reflow. |
| 05 | Through-Hole Component Insertion | Remaining non-SMD parts (connectors, large capacitors) are manually or automatically inserted into plated through-holes. |
| 06 | Wave Soldering (For Mixed Technology) | Boards with through-hole components pass over a molten solder wave, forming connections on the underside. |
| 07 | Conformal Coating (If Required) | Protective chemical layer applied to shield assembled boards from environmental factors (moisture, dust, chemicals). |
| 08 | Secondary Reflow (For Double-Sided Assembly) | Process repeats (steps 1-4) for components on the board's opposite side, using higher-temperature solder or adhesive. |
| 09 | Advanced Inspection & Testing | X-ray Inspection (AXI): Examines hidden connections (BGAs, QFNs) for voids, bridging, or alignment defects. In-Circuit Testing (ICT): Electrical verification of component functionality and circuit performance. Functional Testing (FCT): Validates the fully assembled board against operational specifications. |
| 10 | Cleaning & Final Assembly | Flux residues removed (if needed); boards undergo final integration (housing, connectors) in a controlled environment. |
| 11 | Rework & Repair | Dedicated stations (BGA rework, SMT IR) correct identified defects for component replacement or solder joint remediation. |
Your Trusted Prototype PCB Assembly Partner
Whether you're validating a new design or preparing for production, our PCBA service helps you move forward with confidence.
Why Choose Our SMT Services?
Uncompromising Quality Assurance
Superior reliability through high-grade materials and a rigorous six-stage inspection process that proactively eliminates defects.
Optimized Cost Efficiency
Direct factory oversight and strategic supplier networks ensure premium manufacturing quality at industry-leading competitive prices.
High-Capacity Rapid Fulfillment
Eight high-speed SMT lines delivering 30 million points daily, leveraging advanced automation for lightning-fast project completion.
Comprehensive Full Turnkey Solutions
From electronic engineering and PCB fabrication to box-build and testing, we provide seamless, end-to-end manufacturing for diverse industries.
Versatile Cross-Industry Expertise
Proven success in telecommunications, medical, automotive, and industrial control, providing specialized solutions tailored to complex sector requirements.
Rapid 24-Hour Quote Response
Simply upload your Gerber and BOM files to receive a comprehensive, cost-effective quotation within 24 hours from the YSX team.
Your One-Stop PCB & PCBA Partner
Partnering with YSX Electronics means superior PCB and PCBA products, faster time-to-market, cost-efficient solutions, and a service experience that simply works.
PCBA Industry
Employees
Monthly Production
Frequently Asked Questions
Get Expert Answers. Get Your Project Moving Faster
What is the smallest component size you can handle?
Our high-precision SMT lines can accurately place components as small as 01005 and 0201, including fine-pitch BGA and QFN packages.
Do you perform AOI and X-Ray inspection for all boards?
Yes, we use Automated Optical Inspection (AOI) for all runs, and X-Ray inspection is mandatory for boards with BGA or complex bottom-terminated components.
How do you ensure Solder Paste quality?
We utilize fully automatic Solder Paste Inspection (SPI) machines to monitor volume, area, and height, ensuring flawless connectivity before reflow.
Can you handle double-sided SMT assembly?
Absolutely. We support complex double-sided SMT layouts, utilizing specialized fixtures and optimized reflow profiles to maintain component integrity on both sides.
What is your typical lead time for SMT prototypes
For quick-turn prototypes, we can complete SMT assembly within 24 to 48 hours after all components and PCB boards are received.
Need any Help!
More Circuit Boards & Assembly Manufacturing Services