// High-Precision SMT PCB AssemblyAdvanced Surface Mount Technology for Reliable Prototypes and Production
At KKPCB, we operate state-of-the-art SMT assembly lines designed for precision, reliability, and speed. Our advanced production systems ensure consistent quality and faster turnaround for both prototype and production runs.
We handle single- and double-sided SMT assemblies for a wide range of component types, including:
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Ball Grid Array (BGA)
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Ultra-Fine Ball Grid Array (uBGA)
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Quad Flat Pack No-Lead (QFN)
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Quad Flat Package (QFP)
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Small Outline Integrated Circuit (SOIC)
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Plastic Leaded Chip Carrier (PLCC)
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Package-on-Package (PoP)
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Small Pitch Components down to 0.2 mm
To guarantee the highest level of accuracy and reliability in high-density SMT PCB assemblies, we apply multiple testing and inspection processes, including:
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Automated Optical Inspection (AOI)
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X-ray Testing
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In-Circuit Testing (ICT)
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Functional Testing
Through rigorous process control and advanced inspection technologies, KKPCB ensures zero-defect performance and production-ready PCB assemblies for demanding industries such as automotive, telecommunications, medical, and industrial automation.
// High-Precision SMT PCB AssemblyAdvanced Surface Mount Technology for Reliable Prototypes and Production
KKPCB provides professional SMT PCB assembly services powered by advanced automated production lines equipped with high-speed pick-and-place machines, precision reflow soldering, AOI, X-ray, and ICT inspection systems. We specialize in high-density and fine-pitch component assembly including BGA, QFN, CSP, PoP, and ultra-small 01005 packages, ensuring unmatched accuracy and consistency in every build. Through comprehensive DFM analysis and process optimization, we achieve excellent yield and reliability even for complex SMT designs. With flexible production capabilities covering prototypes, small, and medium-volume runs, KKPCB serves clients across industrial control, automotive, telecommunications, medical, and IoT industries. By integrating strict process control, full material traceability, and ISO/IATF-certified management, we guarantee zero-defect quality, rapid turnaround, and long-term reliability—helping customers accelerate time-to-market with confidence and precision.
communication module SMT patch
Gaming graphics card SMT assembly
Communication module SMT Assembly
Industrial control SMT PCB Assembly
mmWave Hybrid PCB Assembly
mmWave sensing device PCB Assembly
Military Applications RF PCB Assembly
RRU3908 base station PCB Assembly
Core motherboard SMT PCB Assembly
// PCB SMT ServicesOne-Stop Solution for High-Precision SMT PCB Assembly
KKPCB offers comprehensive, turnkey SMT PCB assembly services, providing precise and reliable mounting for fine-pitch and high-density components. From prototypes to small- and medium-volume production, we deliver consistent quality, rapid turnaround, and production-ready boards.
SMT PCB Stencil
We rely on advanced machines for SMT PCB stencils and component placement during board assembly. We prioritize the use of materials that can withstand harsh working conditions without any errors. By opting for high-quality stencils, we can reduce errors, ensure optimal performance, and meet soldering requirements. Our team of experts can offer valuable advice on the most suitable stencil for your PCBs, considering factors such as compactness and efficient positioning of components. We are committed to delivering top-quality results and providing the best possible service to our clients.
SMT Soldering
With our special techniques and equipment, we perform SMT soldering during the PCB assembly. We ensure all the components placed during the soldering processes are not damaged and even the final soldered quality is higher. Many times, equipment failures happened due to low-quality soldering. We do high quality soldering to optimize the PCB assembly process, improve the overall equipment reliability, and adhere to the highest quality standards. We hold experience in all the SMD soldering techniques like hand soldering, hot air soldering, and hot plate soldering.
Reflow soldering
We further provide reflow soldering options for your board as you move towards the completion of the assembly process. Get a proper reflow profile for building acceptable solder joints without causing any damage to the parts or assembly. For the reflow soldering process, we pick the suitable machines, acceptable reflow profile, PCB component footprint design, well-designed stencils, high quality PCB, components & solder paste, and repeatable placement of surface mount components. We even get the profiled assembly for a lead-free solder by not causing any damage to the components at maximum temperature.
Fine pitch assembly processing
Get professional and sophisticated high-density PCB assemblies with a significantly high number of components that are extremely close together as we push the tolerance limits. Even for the finest and miniature components, where you need smaller pads, we pick the right machines and place the components accurately. We also go for X-ray inspection if you choose to go with leadless and grid-array-based components. Our design and board vendor team work closely for designing fine pitch circuit boards and processing.
Advanced SMT PCB manufacturing
We take great pride in our advanced SMT PCB Manufacturing and assembly lines, which are highly capable of producing complex assemblies. Our expertise includes products with high thermal demand, high-mix ratio, and miniaturized assemblies. Our process is optimized using X-ray machine, AOI machine, and SMT pick and place equipment.
BGA reballing and rework
We pride ourselves on our ability to offer top-notch BGA rework and reballing services. We understand the importance of maintaining the performance and effectiveness of SMT circuit boards, which is why we take a comprehensive and solution-driven approach to every repair assignment. Our team is capable of providing a wide range of services, including reballing, pad and track repair, BGA site modification, repair, and replacement. We are committed to overcoming any performance challenges that may arise and ensuring that all defects are kept in check. With our meticulous and diligent BGA rework, any irregularities can be resolved efficiently and effectively.
01SMT PCB assembly capabilities
| Juki JX-100 SMT Pick & Place Machine | |
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| Technical Specifications | 6 heads with laser alignment, 14,400 components per hour, small chip 8 mm or smaller Placement points per program: 2000 |
| Supported Component Sizes | Height: min 0.3 mm, max 6 mm Size: min 0.75 x 0.5 mm, max 33.5 mm² Lead pitch: 15 mil |
| Supported PCB Sizes | Min: X 50 mm x Y 30 mm Max: X 330 mm x Y 250 mm Thickness: min 0.4 mm, max 4 mm |
| Zevatech FS-750 SMT Pick & Place Machine | |
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| Technical Specifications | 3 heads with laser alignment, 8,000 components per hour, small chip 8 mm or smaller Placement points per program: 2000 |
| Supported Component Sizes | Height: min 0.3 mm, max 6 mm Size: min 1.0 x 0.5 mm, max 23.5 mm² Lead pitch: 15 mil |
| Supported PCB Sizes | Min: X 50 mm x Y 30 mm Max: X 330 mm x Y 250 mm Thickness: min 0.4 mm, max 4 mm |
| Zevatech PM-570 SMT Pick & Place Machine | |
|---|---|
| Technical Specifications | 1 head with laser alignment, 3,870 components per hour, maximum rating Placement points per program: 2000 |
| Supported Component Sizes | Height: max 6 mm Size: min 1.0 x 0.5 mm, max 33.5 mm² Lead pitch: 15 mil |
| Supported PCB Sizes | Min: X 30 mm x Y 30 mm Max: X 406 mm x Y 330 mm Thickness: min 0.6 mm, max 2.5 mm |
02SMT PCB assembly services for various industries
As Surface Mount Technology (SMT) continues to advance, its adoption has rapidly grown across a wide range of industries. Today, SMT PCB assembly services are increasingly critical for applications requiring precision, reliability, and high-density component placement.
Industries we serve include:
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Aerospace & Defense
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Consumer Electronics
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Medical & Healthcare
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Transport & Automotive Electronics
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Telecommunication & Mobile Communications
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LED & Lighting Components
At KKPCB, we provide comprehensive SMT PCB assembly solutions covering all assembly types and PCB sizes—from traditional through-hole assembly to standard SMT and ultra-fine pitch BGA assembly. Our services are flexible, supporting prototype, small, medium, and large-volume production, and accommodating single- or double-sided SMT assembly for all component types. Wave soldering and advanced assembly techniques are performed using cutting-edge equipment in fully ESD-controlled areas, ensuring maximum reliability and quality.
Our SMT assembly capabilities include:
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Complete SMT assembly lines with automated pick-and-place and reflow soldering systems
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Single and double-sided PCB assembly
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Low to high-volume production
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Strict ESD-controlled manufacturing environment
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Full inspection and quality control, including AOI, X-ray, and functional testing
We specialize in high-density, ultra-compact component placement, capable of handling:
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Smallest packages: 01005, 0201, 0402
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Fine-pitch components down to 0.25 mm
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Leadless components, BGA, µBGA, LGA, Package-on-Package (PoP), and other advanced packages
With KKPCB’s SMT assembly services, customers across diverse industries can rely on precision, reliability, rapid turnaround, and scalable production, accelerating their product development while maintaining uncompromising quality.
03SMT Assembly Advantages
Surface-mount technology (SMT) assembly has several advantages over traditional through-hole technology. Here are some of the main advantages of SMT assembly:
1. Space-saving
SMT components are much smaller than through-hole components, which allows for much denser circuitry and smaller PCBs.
2. Faster assembly
SMT components can be placed on a PCB much more quickly than through-hole components, as they can be placed and soldered using automated equipment.
3. Lower cost
SMT assembly is generally less expensive than through-hole assembly, as it requires less manual labor and can be automated more easily.
4. Higher reliability
SMT components are less prone to mechanical stress and vibration, as they are mounted directly on the surface of the PCB.
5. Smaller footprint
As SMT components are much smaller than through-hole components, they take up less space on a PCB, which allows for more compact designs.
6. Weight advantages
SMT components are lighter in weight than through-hole components, which can be an important consideration for applications where weight is a concern, such as in aerospace or portable electronic devices.
04SMT Assembly Testing Capabilities
We make it mandatory for ourselves to perform visual inspections to ensure that there are no missing or misaligned components or issues with solder bridging. In addition to manual inspections, we also use SMT inspection machine to guarantee thoroughness. If we detect any fault during this rigorous inspection process, we immediately send the board back for rework. Once the rework is completed, we again test the boards to verify if everything is working correctly. We take pride in our strict quality control measures and make sure that each board meets our high standards before delivering it to our customers.
We make sure no mistake has been made and that all parts are in the right place by using an AOI machine. As the 3D technology rolled out, we also started going for it instead of 2D inspection and avoided any false calls. With 3D inspection, we go for accurate measurements for a more stable inspection process.
Different Testing Services during SMT Assembly
Automated Optical Inspection
For pre- and post-solder to identify the component presence, placement, and solder quality.
After the component placement, we perform an automated optical inspection to make sure that all the components are mounted in the right place. We use AOI equipment for verifying the components’ placement, orientation, and polarity.
We also perform a post-reflow AOI to make sure no mistakes are made and then we perform an X-ray inspection for the process verification.
X-ray Testing
We go for this test to check on leadless components through an x-ray image of them and the solder joints to make sure that everything is working as expected.
In-circuit Testing
Through this, we look for any joint failures and we perform this through bed-of-nails tests.
Functional Testing
We perform this to ascertain PCBs will work productively and as per the requirements after the SMT assembly. With testing, we ensure the quality of delivered range of SMT PCB assemblies.
// KKPCB Rapid SMT Assembly ServiceWhy Work with Us for SMT Assembly?
Stringent Quality Control
Our SMT assembly process strictly follows high standards and complies with ISO9001, IPC, and UL. We apply several testing and inspection methods to guarantee the high quality of each PCBA, including AOI, x-ray testing, functional testing, etc.
Fast Turnaround Time
Leveraging our state-of-the-art equipment, we deliver PCBAs within your deadlines. Our SMT assembly lines offer high productivity and very high flexibility that allows us to effectively engage in all of our customer requests.
Competitive Prices
In-house manufacturing enables us to control the quality and costs as well. In addition, we have reliable suppliers who offer qualified materials at lower prices. Therefore, we can offer customers more competitive prices while maintaining quality.
Excellent Customer Service
We not only provide PCB assembly services, but more importantly, we are your reliable partner who can provide full lifecycle services. Our professional support team offers 24/7 online service to ensure that all your questions are satisfactorily resolved.24-hour rapid response to provide you with one-on-one nanny consultant pre-sales, sales, after-sales tracking service, for you to answer any difficult questions.
Minimal Knock-on Effects
By improving the production efficiencies, we strive to reduce the knock-on effects that can have serious negative repercussions on business especially when you go for large batch sizes where the impact would be massive.we pride ourselves on the flawless and precise operations of our surface mount assemblies. Our team is committed to continuously improving the efficiency of our circuit board manufacturing processes.
Error Reduction
By utilizing automated surface-mount technology (SMT) to assemble components, we accelerate production rate and minimize the likelihood of any errors during manufacturing.We are skilled in building SMT assemblies those are small in size but run super smoothly while integrating numerous components. We thus have become experts in facilitating lightweight and portable electronics.
// Frequently Asked Questions (FAQ)SMT PCB Assembly (FAQ)
What is SMT PCB Assembly?
SMT (Surface-Mount Technology) PCB assembly involves placing electronic components directly onto the surface of a PCB rather than through holes. Components are positioned by automated machines and soldered using a reflow oven. This method enables higher component density, improved performance, and automation, making it suitable for compact and efficient designs in various industries. SMT is widely used for its speed, accuracy, and ability to support complex electronic assemblies.
What are the benefits of SMT PCB Assembly?
SMT process reduces manufacturing costs and also makes efficient use of the PCB space. Through effective utilization of SMT, we are able to build highly intricate electronic circuits onto miniature and smaller assemblies by relying on automation. Essentially, you can have the following with SMT –
- Smaller PCB Size
- Higher component density
- Fewer drilling holes
- Lower cost
- Faster production time
- Reliability as solder joint formation is more reliable
- Stable and high performing even in shaky conditions
What are the various SMT PCB Assembly types?
SMT assembly types include –
- Ball Grid Array (BGA)
- Ultra-fine Ball Grid Array
- Small Outline Integrated Circuit
- Plastic Leaded Chip Carrier (PLCC)
- Small Chip Packages (SOP)
- Quad Flat Package (QFP)
- Quad Flat Pack No-Lead (QFN)
- Package on Package (POP)
Where are SMT PCB assemblies the most used?
In consumer electronics devices like tablets, mobile phones, there is a need for compact assembly of components onto the printed circuit boards. Here, SMT can be effectively used to make the best and optimum use of the available space. This process also builds lightweight products as there is no need for extra wiring and soldering.
Why should l choose KKPCB for SMT PCB assembly service?
Choosing KKPCB for SMT PCB assembly offers advantages such as extensive expertise, advanced technology, and rigorous quality control. We provide customized solutions, fast turnaround times, and strong customer support, ensuring high-quality and reliable results for your electronic assembly projects.
What are the differences between SMT and Through-hole technology?
SMT (Surface-Mount Technology) and through-hole technology differ primarily in mounting methods and assembly processes. SMT involves placing components directly on the PCB surface and is favored for its high component density, compact design, and efficiency in high-volume production. Through-hole technology, on the other hand, requires components to pass through holes in the PCB and is valued for its strong mechanical connections and suitability for simpler designs or prototypes. SMT generally offers faster assembly and greater design flexibility, while through-hole technology provides robust mechanical support and is better for applications with significant physical stress.
Do you have experience with low-volume assemblies?
Do you follow the manual or automated SMT technologies?
The current trend is automation. So, we follow the same cue. The majority of the SMT parts on your circuit boards will be assembled with automated pick-and-place equipment.
What are the steps involved in the SMT PCB assembly process?
What are the SMT components that do not fit into the process?
Even though we rely on automated assembly processes, some components cannot be placed.
- Components that are lightweight
- Those that have too much heat sensitivity
- Lack of robust solder joints
- Damaged components
What are the things you need to get before you begin the SMT PCB assembly process?
To start the SMT process, we need the components and raw boards to prepare them for production. These things would be validated by your Contract Manufacturer (CM)’s inspection teams to make no mistakes.
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Explore the latest in PCB manufacturing innovations, practical design strategies, and expert insights into assembly processes—along with key updates from the global electronics industry. The KKPCB Blog is your trusted resource for knowledge, expertise, and innovative solutions in the world of printed circuit boards.
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KKPCB is a leading electronic solutions provider specializing in PCB design, fabrication, assembly, and testing for Flex, Rigid-Flex, RF/Microwave, HDI, rigid multilayer, and ATE test boards. We offer comprehensive end-to-end services, including prototyping, component sourcing, SMT/THT assembly, functional testing, enclosure assembly, and final product packaging. With our one-stop, in-house capabilities, KKPCB delivers OEM and ODM solutions with fast turnaround, high quality, and cost-effective results, serving clients worldwide.