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SHENZHEN KAIZUO ELECTRONIC TECHNOLOGY CO., LTD

 

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We are very satisfied wtih you guys. Quick response, professional engineering team, fast delivery, good quality... all are nice. I am sure we can have much more business in the future.

—— Kevin Kinder

End customers were satisfied with the quality, so did I for the past years. Have recommended you to my other friends that have needs in PCBA.

—— Mariusz Sharp

Thanks for help my small business grows up step by step,for prototypes to small, medium & large orders, you will be my first choice for PCB anytime.

—— Adam Burridge

Good price, fast lead and delivery time, shipping cost is quite good! Our company is satisfied with your good service for the last 4 years!

—— Luboš Herceghová

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Custom PCB Assembly

  • High Precision Custom PCB Assembly suppliers

Custom PCB Assembly Process

 

The Custom PCB Assembly process involves multiple stages, including PCB fabrication, component procurement, and assembly. Each stage plays a key role in ensuring the functionality, reliability, and performance of the final assembled board. It is also important to note that the foundation of PCBA is the PCB; without the PCB, the PCBA cannot be created.

PCB Fabrication: As discussed in the PCB manufacturing process, the manufacturing stage involves creating the physical PCB based on the design files. This includes etching copper traces, drilling holes for through-hole components and vias, and applying solder mask and silkscreen. A well-manufactured PCB is the foundation of the assembly process.

 

Component Procurement: Prior to assembly, all necessary electronic components must be sourced. This involves selecting and sourcing components based on design requirements such as performance specifications, form factor, and cost. Component procurement is a critical step because the quality and availability of components can directly affect the performance and delivery time of the PCBA.

 

For high-frequency applications, material selection becomes critical. Materials such as Rogers or polytetrafluoroethylene (PTFE) laminates are often used to minimize signal loss. In addition, the manufacturing process may include impedance control measures and multi-level inspections to ensure signal integrity.

 

Assembly: The assembly process involves mounting and soldering electronic components onto a PCB. This can be done using through-hole soldering, surface mount technology (SMT), or a combination of both techniques, depending on the design requirements and the type of components being used. The assembly process typically includes the following steps:

 

Stenciling: A stencil is used to apply solder paste to the precise locations on the PCB where the surface mount components will be placed. The solder paste contains tiny solder particles suspended in a flux medium that helps form strong, reliable solder joints during the reflow soldering process.

 

Component placement: Using an automated placement machine, surface mount components are precisely placed onto the PCB, aligning their pads with the corresponding solder paste deposits. For through-hole components, leads are inserted into the drilled holes using either manual or automated insertion machines.

 

Reflow soldering: The PCB with the surface mount components in place is passed through a reflow oven, where it is subjected to a controlled temperature profile. The solder paste melts and forms a strong connection between the component pads and the PCB traces. For through-hole components, wave soldering or selective soldering techniques are used to create the solder joints.

 

Inspection and testing: After the assembly process, the PCBA is inspected for defects such as misaligned components, solder bridges, or missing solder joints. Inspection methods include visual inspection, automated optical inspection (AOI), and X-ray inspection. The PCBA is also tested for functionality and performance using techniques such as in-circuit testing (ICT) and functional testing.

 

By understanding the complexities of the PCBA manufacturing process, engineers and designers can make informed decisions to optimize the performance, cost, and manufacturability of the assembled board. This knowledge can also help identify potential issues and implement best practices to ensure the highest quality and reliability of the final electronic device.

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