Precision-Built SMT PCB Assembly Services
Our SMT PCB assembly services offer surface mount technology PCBs built with high accuracy, automated pick and place systems and controlled reflow soldering.
As a trusted PCB assembly China partner, we deliver consistent quality for prototype and volume production across advanced electronics.
- ISO and IPC compliant SMT assembly service for complex circuit boards
- High speed surface mount PCB assembly with precise component placement
- Fast turnaround for PCB prototype assembly and full electronics manufacturing
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ISO9001 ISO13485
ISO14001
IATF
16949
IPC-A-610H International
Certification
Fully Automated
AOI Inspection
What Is SMT PCB Assembly?
Our SMT PCB assembly services leverage automated surface mount technology (SMT) to produce highly reliable circuit boards with precise component placement and robust solder joints.
Using advanced pick and place machines, optimized stencil design, controlled solder paste deposition and tightly monitored reflow profiles, we support SMD PCB assembly for prototypes and high volume electronics.
Every circuit board is built to IPC standards with surface mount components placed directly onto the PCB surface for maximum reliability.
Our SMT PCB Assembly Capabilities
We evaluate circuit layouts, component placement, stencil design, solder paste volume and manufacturability to ensure stable SMT assembly and long term reliability throughout the assembly process.
We coordinate printed circuit board fabrication and SMT PCB assembly, including panelization, solder paste printing, stencil alignment and surface mount technology setup for consistent production.
High-speed pick-and-place machines with vision alignment and optimized nozzle selection ensure precise placement of components down to 0201, as well as complex ICs, BGAs, and fine-pitch devices.
We support SMD (surface mount devices) assembly, through-hole assembly and mixed SMT and through-hole builds for complex electronics requiring both surface mount and plated hole technologies.
We source electronic components from verified suppliers, including resistors, capacitors, ICs, connectors and specialized parts required for printed circuit assembly services.
Our process includes precise solder paste deposition via custom stencils, followed by controlled multi-zone reflow soldering. We also perform selective soldering for through-hole components in mixed-technology builds.
We use automated optical inspection, X-ray inspection for BGAs, AOI systems and flying probe or functional testing to validate process control and assembly quality.
All SMT assembly services follow IPC standards, ensuring consistency and quality for every PCBA build.
We support PCB prototype assembly for engineering validation and full scale PCBA production, maintaining consistency from initial builds to high volume electronics manufacturing.
Why Choose WellPCB for SMT PCB Assembly Services?
SMT PCB Assembly Built to Your Specs
IPC Class 3 SMT Assembly
Fast SMT Prototype Assembly
Complete Traceability of Every SMT PCB
Decades of PCB Experience
Fast Global Delivery
Technical Specifications for SMT PCB Assembly
| Parameter | Specification Range | Why It Matters |
|---|---|---|
| Component Sizes | 0201, 0402, fine-pitch ICs, QFN, QFP, BGA, micro-BGA | Supports high-density SMD assembly and advanced integrated circuit packages |
| Solder Paste Type | Lead-free or SnPb alloys, optimized solder particles | Ensures stable printing, wetting, and reliable joints during reflow |
| Stencil Thickness | 0.10 mm to 0.20 mm | Controls solder paste volume for accurate surface mount component placement |
| Reflow Profile | Multi-zone convection reflow oven with controlled temperature curve | Prevents solder bridging, uneven heating, and component damage |
| Pick and Place Accuracy | ±0.03 to 0.05 mm depending on nozzle type | Allows precise placement directly onto the PCB surface for complex electronics |
| Placement Speed | Up to 40,000 components per hour | Enables faster production and consistent PCB SMT assembly throughput |
| Inspection Methods | AOI, X-ray inspection, optical inspection, flying probe | Validates solder joints, BGA alignment, and full assembly process control |
| Board Thickness | 0.6 mm to 2.4 mm | Accommodates various printed circuit board fabrication requirements |
| Supported PCB Types | Single-sided, double-sided, and mixed SMT and through-hole | Maximizes design flexibility for all electronic components |
| Soldering Methods | Reflow soldering, selective solder for through-hole | Ensures correct bonding of component leads to pads for long-term reliability |
| IPC Standards | IPC-A-610, IPC-7351 | Maintains consistency, quality, and professional workmanship |
| Testing Options | Functional testing, flying probe, continuity checks | Confirms electrical and electronic performance before shipment |
Types of SMT PCB Assemblies We Build
We support a wide range of SMT PCB assembly builds, from simple single-sided layouts to complex multi-layer circuit boards with fine-pitch components, BGAs and mixed technology requirements.
Single-Sided SMT Board Assembly
Ideal for cost-efficient electronics and low-complexity circuit designs where surface mount components are placed on one side of the PCB.
Double-Sided SMT Assembly
Supports higher component density with SMD placement on both sides of the board, enabling compact layouts and improved routing for advanced circuits.
High-Density SMD Assembly
Designed for 0201 parts, micro-BGAs, QFNs, fine-pitch ICs and other miniaturized components used in high-performance electronic devices.
Mixed SMT and Through-Hole Assembly
Combines surface mount components with through-hole technology for boards requiring mechanical strength, larger connectors or specialized component types.
Prototype SMT PCB Assembly
Fast-turn PCBs that allow engineers to validate circuit performance, optimize component placement and accelerate product development before mass production.
How to Order SMT PCB Assembly Services
Submit Your PCB Design
Upload your Gerber files or use our easy online PCB design tool to create your board layout. Make sure your files are complete and correctly formatted to ensure smooth processing and production accuracy.
Select Your PCB Specifications
Customize your order by choosing the technical specifications—number of layers, board dimensions, thickness, copper weight, solder mask color, surface finish, and more. Our intuitive interface helps you configure everything based on your project’s needs.
Get an Instant Quote
Once your design and specs are in place, you'll receive a transparent, instant quote. Pricing updates in real time as you modify options, so you can adjust your selections to match your budget before placing the order.
Confirm Order & Make Payment
Review your entire order for accuracy, including file previews and selected specs. After confirmation, proceed to secure checkout and choose your preferred payment method. You’ll receive an email confirmation with order details.
Production & Delivery
Your PCB moves into production immediately. We’ll keep you updated throughout the manufacturing process. Once completed, your boards are carefully packed and shipped to your door, with tracking information provided for your convenience.
WellPCB is trusted by millions of
businesses and innovators.
Why Choose WellPCB?
WellPCB stands out among USA PCB manufacturers by delivering superior quality, advanced solutions, and unmatched reliability. With years of experience serving global markets, WellPCB has earned a reputation as one of the top PCB manufacturers in USA.
WellPCB specializes in multilayer PCBs for advanced electronic applications. You can order these boards with $100 off using our special offer, providing high complexity at competitive rates for demanding projects.
Hommer Zhao
Founder and Chief Editor – Hommer Zhao
Welcome! I’m Hommer Zhao, the founder and Chief Editor of WellPCB. With years of experience in the PCB industry, I’m committed to making sure our content is both accurate and helpful. We’re proud to serve a growing community of over 4,000 customers worldwide, and our goal is to provide you with the best resources and support. Your satisfaction is our top priority, and we’re here to help you every step of the way!
Jesse Holland
Technical Manager – Jesse Holland
Hi, I’m Jesse Holland, an Engineer and Technical Manager at WellPCB. With years of experience in PCB design and engineering, I’m here to ensure that every project we work on meets the highest technical standards. I lead our team, focusing on precision and innovation, collaborating closely with clients to provide tailored solutions and expert guidance. Whether you’re facing a complex design challenge or need advice on technical aspects, I’m here to ensure your project is a success from start to finish.
Nathan Jensen
Purchasing Manager – Nathan Jensen
Hi, I’m Nathan Jenson, the Purchasing Manager at WellPCB. I’m responsible for sourcing the best materials and components to ensure our products meet the highest quality standards. With my extensive experience in procurement, I work closely with suppliers to secure reliable and cost-effective solutions while maintaining strong relationships to support our operations. I aim to ensure every project runs smoothly by providing the resources needed to deliver on time and to your satisfaction.
Emma
Sales Manager – Emma
Hey, I am Emma, sales manager at WellPCB. I studied electronic science and technology at university and have served customers for PCB and PCB Assembly service for several years.

I enjoy communicating with customers and our technicians to solve problems, and customers always say, "It's great to have you onboard".

It is my pleasure and honour to be helpful. Contact me now, and you'll know.
Bella and Cassiel
Sales Representatives – Bella and Cassiel
We’re Bella and Cassiel, your dedicated sales representatives at WellPCB. With our extensive knowledge of the PCB industry, we’re here to provide exceptional service and support. We take the time to understand your unique needs and are always ready to offer tailored solutions and advice. Whether you need product recommendations, assistance with your orders, or simply have a question, we’re here to ensure your experience is smooth and seamless at every step.
Mandy and Wendy
Sales Representatives – Mandy and Wendy
We’re Mandy and Wendy, your friendly sales representatives at WellPCB. Passionate about helping our customers, we bring a wealth of experience in the PCB industry to provide you with the best solutions and service. We take pride in building strong relationships with our clients, understanding their specific needs, and offering personalised support to ensure their satisfaction. Whether you’re looking for advice, product information, or assistance with any part of your order, we’re here to make your experience as smooth and efficient as possible.
Our Team
Our skilled engineers and technicians bring expertise and precision to every PCB assembly project. Committed to quality, efficiency, and innovation, our team ensures every order meets the highest UL, IPC, ROHS & REACH standards, delivering reliable solutions tailored to your needs.
- Founder and Chief Editor – Hommer Zhao
- Technical Manager – Jesse Holland
- Purchasing Manager – Nathan Jensen
- Sales Manager – Emma
- Sales Representatives – Bella and Cassiel
- Sales Representatives – Mandy and Wendy
Industrial Control PCB Assembly Case Studies
PCB Assembly
The picture shows an HDMI-to-DVI cable with USB power. It can be used to connect HDMI-enabled devices (such as laptops and TV boxes) to DVI-equipped monitors and other home appliances.
Advantages:
- •Strong Compatibility: Allows connection between devices with different interface standards, expanding their use cases.
- •Stable Transmission: Provides stable video signal transmission, minimizing interference and loss during signal transmission.
- •Convenient Power Supply: No need to find a separate power source, making it more convenient to use.
PCB Assembly
The picture shows an HDMI-to-DVI cable with USB power. It can be used to connect HDMI-enabled devices (such as laptops and TV boxes) to DVI-equipped monitors and other home appliances.
Advantages:
- •Strong Compatibility: Allows connection between devices with different interface standards, expanding their use cases.
- •Stable Transmission: Provides stable video signal transmission, minimizing interference and loss during signal transmission.
- •Convenient Power Supply: No need to find a separate power source, making it more convenient to use.
PCB Assembly
The picture shows an HDMI-to-DVI cable with USB power. It can be used to connect HDMI-enabled devices (such as laptops and TV boxes) to DVI-equipped monitors and other home appliances.
Advantages:
- •Strong Compatibility: Allows connection between devices with different interface standards, expanding their use cases.
- •Stable Transmission: Provides stable video signal transmission, minimizing interference and loss during signal transmission.
- •Convenient Power Supply: No need to find a separate power source, making it more convenient to use.
SMT PCB Assembly Services Client Feedback
As an R&D manager, I have had an outstanding experience working with WELL-PCB. For many years, our company has entrusted them with the production, assembly, and programming of the boards developed in our R&D unit, and they have consistently exceeded our expectations.
Hamid Reza Moshayedi
R&D Manager
Their work is very impressively perfect. Today, when they check our company PCB board after assemble. They found a fake short point which many engineers has never found in the past years. But that is just designed so. The PCB board quality is excellent. Their service is also excellent.
MikeZ
My friend introduced WellPCB to me, the first try, a little look forward to. I ordered a 47*72 10ps PCB, and I can’t wait to receive my PCB. So I used expedited service and received my PCB in three days. I tested and soldered the PCB, Quality is really good, silkscreen, plating also great.
Warren Cliton
SMT PCB Assembly Services FAQs
What’s the difference between SMD components and through-hole components?
SMD components are mounted directly onto the surface of the PCB using SMT, while through-hole components use drilled holes and leads for mechanical strength or high-power applications.
How do you ensure accurate component placement during SMT assembly?
We use high-precision pick-and-place machines with calibrated nozzles, component libraries and vision alignment systems to ensure correct orientation, footprint matching and placement accuracy.
Can you assemble boards that require both SMT and selective soldering?
Yes. For mixed-technology assemblies, SMT components are placed and reflowed first, followed by selective solder for through-hole parts, which are often added after the reflow process due to their size, sensitivity, or mechanical requirements.
What file formats do you accept for SMT PCB assembly?
We support Gerber files, centroid or pick-and-place files, BOMs and additional PCB design data required for accurate stencil creation and component placement programming.
Built-to-Spec SMT PCB Assembly Services
Get $100 Off Your First Order!
Whether you need fast prototypes or full production volumes, WellPCB delivers high precision SMT PCB assembly with reliable process control, documented quality and consistent performance for complex electronics.
