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, UMO Technology provides an extensive range of assembly services to cater to even the most challenging and demanding projects.
- SMT Assembly
- Through Hole PCB Assembly
- Mixed Assembly
- Lead Free Assembly
- BGA Assembly
- Fast Turnaround PCB Assembly
- Prototype Assembly
- Small Batch PCB Assembly
- High Volume PCB Assembly
- Mechanical Assembly
Precision Processes:
– SMT Assembly:
– Ultra-fine pitch: 0.25mm CSP placements.
Paste inspection (SPI) for solder volume control.
– Through-Hole (THT):
– Selective soldering for mixed boards (avoiding thermal damage).
Complex Assemblies:
– Press-fit connectors, epoxy-underfilled BGAs.
Quality Assurance Flow:
– DFM review (identifying tombstoning risks, thermal imbalances).
– AOI (detects 99.9% of solder defects).
– X-ray for void analysis (<15% voiding in BGAs).
– Burn-in testing (72hrs at 85°C for automotive).
Industry-Specific Compliance:
– Automotive: AEC-Q100 Grade 2 (-40°C to +105°C).
– Medical: IPC-A-610 Class 3.
Pledge
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
| Item | Capability |
|---|---|
| Max Board Size | 680×500 mm (Smallest: 0.25″x0.25″) |
| Min Component Size | 0.2 – 54 mm (0.084 sq. inch) |
| Wave-Solder | — Max. PCB width: 450 mm. — Min. PCB width: not limited. — Component height: Top 120 mm / Bottom 15 mm |
| Sweat-Solder | — 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. |
| Quantity | MOQ=0 |
| 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 |
| Components | — Passives down to 0201 size — BGA and VFBGA — 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 | — X-RAY — AOI — ICT — 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 |
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 UMO 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.
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Best China PCB Assembly Manufacturer
UMO Technology is a China-based PCB assembly service provider that was established in Shenzhen, China in 2019. As a full service electronic manufacturing services company providing complete assembly solutions, UMO 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: UMO 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 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 UMO Technology.
