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PCB Assembly Service

PCB assembly encompasses the process of mounting electronic components onto a bare board through assembly and soldering techniques, resulting in a fully functional PCBA board. The accurate circuit board assembly is crucial to achieving the desired functionality and involves multiple aspects, including precise component placement and accurate soldering. Even a minor error, such as a misplaced resistor or a small cut in the trace, can lead to assembly malfunctions. To ensure the success of your project, it is essential to partner with a reliable PCB assembly service provider like FS Technology.

As a leading PCBA company based in Shenzhen, China, we specialize in delivering highly professional and comprehensive electronic assembly services to the electronics manufacturing industry. Our expertise and dedication to precision enable us to ensure the accuracy and reliability of your project. We invite you to reach out to us for assistance, and our team will be delighted to provide you with a competitive PCB assembly quotation promptly and without hesitation.

PCB Assembly in China

Obviously, opting for “Made in China” offers a trade-off between quality and price. As a highly promising manufacturer in China, FS Technology provides an extensive range of assembly services to cater to even the most challenging and demanding projects.


We source electronic components from world-renowned IC manufacturers, such as Qualcomm, TSMC, DigiKey, and Mouser, and we ensure that these components are original and authentic for PCB electronics assembly. In the face of the chaotic component market, we have our own management system and contingency plan. If there is a shortage of materials, our engineers will provide cost-effective alternatives for your review. Additionally, we have a large storage space for components to minimize the risk of global component shortages.

PCB Assembly Capabilities

Max Board Size680×500 mm (Smallest: 0.25″x0.25″)
Min Component Size0.2 – 54 mm (0.084 sq. inch)

— Max. PCB width: 450 mm.
— Min. PCB width: not limited.
— Component height: Top 120 mm / Bottom 15 mm

— Metal type: part, whole, inlay, sidestep
— Metal material: Copper, Aluminum
Surface Finish: plating Au, plating silver, plating Sn
— Air bladder rate: less than 20%
Press-fit— Press range: 0-50 KN
— Max. PCB size: 800×600 mm.

Type of Assembly
— SMT PCB Assembly
Double-Sided SMT PCB Assembly
— THT PCB Assembly
— Mixed Technology PCB Assembly
— Component sequencers, Axial lead inserting, DIP sequence inserting system
Solder Type— Water Soluble Solder Paste
— Leaded
— Lead-Free



— Passives down to 0201 size
— Leadless Chip Carrier/CSP
— Fine Pitch to 08 Mil BGA
— Repair and Reball
— Part Removal and Replacement
File Formats— Bill of Materials
Gerber Files
— Pick-N-Place File (XYRS)
Packaging— Cut Tape
— Tube, Reels
— Loose Parts



PCB Assembly Inspection

— Probe Flying
— Burn In
Function Test
— Temperature Cycling

PCB Assembly Line
— 7 SMT and THT lines
— Same-Day Service to 15-day service
— 52 million placements per month
— 0.15 sec/chip, 0.7 sec/QFP

Advanced Equipment
— Japanese SONY high-speed SMT SI-F130WR                                Qty: 23
— Japanese SONY multifunctional SMT SI-F209                               Qty: 7
— Japanese YAMAHA multifunctional SMT YV100XGP                     Qty: 7
— DESEN Automatic silk printing machine DSP-1008                       Qty: 10
— YoungXin lift slab machines BL-250W-ST                                      Qty: 8
— American Heller 18 zones reflow oven                                             Qty: 4
— America PACEB BGA repair station                                                  Qty: 2
— Japanese SONY AOT tester                                                                Qty: 4
— 3D-SPI checkout equipment                                                             Qty: 2
— ChaoJinDa full-aotumatic ultrasonic cleaning machine          Qty: 3
— Japanese X-Ray detector                                                                  Qty: 1
— YongXing Industrial oven                                                                    Qty: 3
— Automatic double wave peak welding line                                    Qty: 2
— Automatic belt post-welding production line                               Qty: 5
— Automatic belt assembly line                                                           Qty: 1
— Automatic belt cleaning packaging line                                       Qty: 2
— Computer test maintenance equipment                                      Qty: 15
— Online AOI detection equipment                                                     Qty: 4

Display of Assembled Circuit Boards

Printed Circuit Assembly Scheme​

The best PCB assembly service manufacturers should possess the capability to offer customized services tailored to the specific requirements of each customer. This is essential because companies of varying sizes, at different stages, and with distinct needs will have unique demands in terms of projects.

Turnkey Scheme

Turnkey refers to a comprehensive service provided by EMS providers that encompasses the entire electronic assembly process, from component procurement to final assembly and testing. In other words, customers provide the PCB design files and specifications, and the EMS company handles the rest.

At FS Technology, we offer a complete range of support and services, from circuit design to product delivery. As a manufacturer with our own manufacturing and assembly workshop, we can meet most customer needs, including prototype to batch, manufacturing to assembly, procurement to testing, and more.

The turnkey PCB assembly service is suitable for customers who wish to outsource the entire assembly process and have a single point of contact for their electronic projects. This enables customers to save time in project management and allocate resources to the final sales process.

Partial Turnkey Scheme

Partial turnkey is a cost-effective solution for PCB circuit board assembly that involves the customer handling some aspects of the assembly process, while the assembly company takes care of the rest. In some cases, customers can provide specific components, such as ICs and main control chips, while the service provider is responsible for purchasing conventional components, such as inductors and capacitors.

Partial turnkey PCB assembly option is suitable for customers who have specialized or unique components they prefer to supply, or who wish to have greater control over the assembly process. It is also cost-effective for customers who want to save on some component procurement costs. However, it is important to note that this option requires the assembly company to have sufficient procurement and management experience, and involves more coordination, otherwise it may impact the overall quality of the project.

Consigned Scheme

The consignment PCB assembly service means that the customer provides the PCB board and all the required electronic components, and the service provider only needs to carry out the final assembly and testing. This option can be the most cost-effective for customers as they can purchase components in larger quantities and benefit from volume pricing.

However, consignment to a client comes with higher risks, reflected in procurement costs and multiple service providers. Firstly, it requires customers to have certain storage management capabilities, risk tolerance for component failures, and extensive component procurement channels. Additionally, most customers do not have PCB manufacturing capabilities, which means that they need to cooperate with PCB manufacturers and PCBA processing plants simultaneously. This can cause information gaps, making communication less convenient than point-to-point communication.

Kitted Scheme

The customer is responsible for procuring all materials, while FS Technology handles the PCB manufacturing and assembly, as well as PCB testing according to customer needs after the production process is completed. Through past service projects, we have found that some of our customers rely on foreign trade service providers in Hong Kong for procurement, although it is an undisputed fact that their services are good. However, this means that our customers have to bear unnecessary costs, because FS Technology can provide all the services that these service providers offer.

Bare Board Assembly

This solution assumes that the customer already has a stable and high-quality PCB manufacturer. The PCB manufacturer is responsible for manufacturing the bare boards and delivering them to FS Technology. We then purchase and assemble electronic components according to the requirements of the customer’s documentation.

Fully Custom PCB Assembly

This type of service can also be referred to as mixed assembly, and it is a fully customizable service option. Customers can combine the different solutions we have mentioned according to their specific needs. This form of service provides maximum flexibility to meet individual customer requirements and achieve successful electronic assembly processes.

High Quality PCB Assembly

If you require factory inspections, we will meet your needs without hesitation. You will observe uniform production lines, qualified technicians, advanced equipment, and more. Below, we have outlined our equipment and production line. If you are interested in our services, please contact us via email, and we will promptly provide you with a quote for cheap PCB assembly.

Our partner

FS Technology has been serving the PCBA industry for 20 years, providing electronic assembly services to the most discerning engineers and designers who choose us as their business partner in China. Almost all of the customers we have served have given us positive reviews, and they come from various channels including our official website, Alibaba, and customer referrals.

Here are some of the top customers we are currently working with:

Assembly workshop

Our PCB manufacturing and assembly workshop is situated in Shenzhen’s largest science and technology park, covering an area of approximately 50,000 square feet. Equipped with state-of-the-art automation equipment, we can accurately and efficiently fulfill any PCBA orders in large quantities. Our standard and advanced modes can be switched to strike the perfect balance between cost and performance.

Our strong service capabilities are endowed by advanced assembly and manufacturing equipment. Currently, we can provide services to industries such as industrial, medical, consumer electronics, military, aerospace, and more.

Perfect Assembly Process

The first step in the PCB assembly process is to apply solder paste to the intended areas to be soldered. This is done by smearing solder paste on the PCB stencil and then using a squeegee to apply it at the designated location on the board.

Solder paste printing

Then is the component placement, which is carried out using a pick-and-place robot. These automated devices require precise programming instructions that include predefined X and Y coordinates for each component. The pick-and-place robot then accurately positions the components on the PCB using a vacuum grip.

The success of the assembly project heavily relies on the accuracy of the design documents. To ensure a smooth assembly process, the engineering team at FS Technology will thoroughly review your design documents prior to commencing the project.

Automatic component installation

FS Technology uses a reflow oven with ten temperature zones to complete SMT soldering to form a strong joint.

Advanced 10 temperature zone reflow soldering

After reflow soldering, the electronic components may become misaligned due to movement in the holding tray, resulting in open connections or short circuits. Professional manufacturers must identify these errors to reduce the failure rate, for example, FS Technology will adopt manual inspection, optical inspection and X-ray inspection at this stage.

Inspectors who are conducting AOI inspection

This involves inserting the pins of the component into the designated PTH holes, which is usually done manually, but FS Technology offers both AI plug-ins and manual plug-ins, depending on the size of the component and the scale of the project.

                                                           artificial plug-inAI automatic plug-in

For through-hole assembly, it is more beneficial to use wave soldering, but it should be noted that it has difficulty in double-sided PCB assembly.

PCB Assembly Using Wave Soldering

At this point, the assembly process has come to an end, we will conduct functional tests, electrical tests, etc. on the assembled circuit boards to ensure the success of the assembly and perform the expected functions.

Bed of Needles Testing in PCB Assembly

After verifying the accuracy of the PCBA board, it needs to be surface cleaned to remove dirt and stains, and after drying is completed, it is packed with an electrostatic bag and sent to the customer.

Cleaning the assembled PCB

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PCB assembly display

Best China PCB Assembly Manufacturer

FS Technology is a China-based PCB assembly service provider that was established in Shenzhen, China in 2004. As a full service electronic manufacturing services company providing complete assembly solutions, FS Tech has expertise in fast turnkey PCBA services. Our mission is to provide cost-effective solutions by maintaining high quality for the clients.

In terms of speed: As of now, we have 7 fully automatic SMT assembly lines for fast turnaround and we are expanding our production line.

In terms of quality: FS Technology has obtained a number of qualification certifications including: ISO9001:2015, ISO14001:2015, ISO45001:2018, ISO13485:2016, IATF16949:2016, and has the ability to complete electronic PCB assembly in aerospace, medical, military and other industries

Comprehensive PCB Assembly Services

Our PCBA services include PCB Fabrication, Component Sourcing, IC Programming, Uploading Firmware, Mechanical Assembly redesigning, and Upgradation. The following is the specific content:

  • A wide range of assembly services: Including SMT, THT, mixed assembly, flexible, rigid, and rigid-flex.
  • 100% Quality Guarantee: FS Technology sources all of its parts from reputable suppliers and manufacturers. We thoroughly test and inspect all circuit board components to ensure that they meet the highest quality standards.
  • Custom Services: We offer customized services that cater to the unique needs of our customers, providing PCBA boards with varying performance parameters to suit different environments. Our team of experts collaborates with you during the process to understand your design requirements and recommend a tailored solution.
  • Fast turnaround: Our top priority is to deliver PCBAs to electronics manufacturers faster, and this can be easily achieved through our fast turnaround service. Project lead times vary from case to case but typically take a few weeks for standard projects. Assembly lead times may be improved if all components are procured quickly.
PCB assembly workshop

Customer reviews

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I've worked with several Chinese companies over the years, and FS Technology is by far the best. They have an incredibly knowledgeable team, use top-notch equipment, and always deliver high-quality products on time. I highly recommend them.
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Their attention to detail, commitment to quality and excellent communication made the project go very smoothly.
#!trpst#trp-gettext data-trpgettextoriginal=403#!trpen#Читай ещё#!trpst#/trp-gettext#!trpen#
We've been working with FS Technology for several years and have never been disappointed. Their customer service is outstanding, and they always go above and beyond to make sure our projects are successful.
#!trpst#trp-gettext data-trpgettextoriginal=403#!trpen#Читай ещё#!trpst#/trp-gettext#!trpen#
I can't say enough good things about FS Technology. They're always professional, responsive, and deliver high-quality products at a fair price.
#!trpst#trp-gettext data-trpgettextoriginal=403#!trpen#Читай ещё#!trpst#/trp-gettext#!trpen#
Their attention to detail, quality control, and customer service are unparalleled. We've worked with several other PCB assembly services manufacturers in the past, but none have come close to the level of service that FS Technology provides.
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FS Technology provided excellent service throughout the entire process. They were very responsive to our requests and delivered high-quality products on time.
Jane Doe
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Working with FS Technology was a pleasure. Their team was professional, knowledgeable, and attentive to our needs. They exceeded our expectations and we look forward to doing business with them again
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PCB Assembly FAQ

PCB is an abbreviation for printed circuit board, and when we refer to it, it usually means bare board.

PCBA board is a rigid body of a PCB with various electronic components and is typically green in color, they consist of a fiberglass substrate, electronic components, conductive traces on copper layers, holes in which the components are fitted, and different layers.

Advanced Reading: What is difference between PCB and PCBA?

We believe that PCB bare board is unable to function effectively until they are assembled into PCBA board to fulfill their intended purpose in electronics. You can tailor the circuit design according to your specific requirements. Once the printed circuit board assembly is complete, the conductive traces on the PCB facilitate the transmission of digital, high-speed, or analog signals between different points, enabling the desired functionality.

Advanced Reading: How Do Circuit Boards Work?

Prior to the advent of pick-and-place robots, the task of component placement was typically performed manually by technicians using tools like tweezers to carefully position each component onto the designated location on the PCB. However, this manual process was time-consuming and labor-intensive, often leading to longer lead times, increased eye strain, and fatigue among technicians.

To address these challenges and enhance the efficiency of PCB assembly and manufacturing, pick-and-place robots were introduced. These automated robotic systems revolutionized the industry by streamlining the component placement process. By utilizing programmed instructions and advanced machine vision systems, pick-and-place robots can accurately and swiftly position components onto the PCB with precision.

A crucial element in the SMT assembly process is the use of commercial reflow ovens. These ovens employ a controlled heating and cooling cycle to securely attach components to the PCB. When selecting a service provider, it is advisable to consider the temperature zones of their equipment.

For hobbyist projects or small-scale assembly, a soldering iron can be utilized for soldering tasks. This handheld tool allows precise application of heat to melt solder and establish electrical connections between components and the PCB.

As long as you have needs, we can provide all testing items, of course, including paid and free. For example, functional testing, flying probe testing, etc. need to be borne by the customer, while for AOI, manual inspection, etc. will be included in the quality control link of FS Technology.

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