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- March 26, 2023
- PCB knowledge
- (0)
- 06 mins
SMT assembly – how is it different from SMD
Wondering what is SMT assembly, or how it works? The process of surface mount technology (SMT) assembly is essential for creating reliable and durable products and it is considered one of the most important parts of today’s modern electronics manufacturing industry.
In this blog, we’re going to cover all aspects of SMT assembly, from understanding the components used in an assembly to introducing helpful tips on optimizing your assembly procedures.
What is SMT assembly?
Surface mount technology (SMT) involves applying electronic components directly to the surface of a printed circuit board (PCB) without requiring large wires or cables. By using refined soldering processes, manufacturers can build smaller, more efficient circuit boards without sacrificing reliability.
SMT assembly has been used in the creation of cutting-edge technologies including autonomous vehicles, unmanned drones, and smart home devices. This technology also offers advanced heat management and reduced power consumption which makes it immensely popular with consumers.
What is an SMT assembly line?
A surface mount assembly line is a manufacturing process used to populate circuit boards with electronic components. It involves first the placement of a variety of small parts, such as capacitors and resistors, onto the board.
After all, the parts have been placed, they are soldered in place to make electrical connections between them and all other elements on the board. This type of assembly allows for tighter tolerances, thinner components, more reliable connections, and more efficient production than traditional through-hole components.
What is an SMT assembly machine?
When it comes to surface mount assembly machines (SMTs), modern electronics production relies heavily on them. It is used to quickly and efficiently attach components such as capacitors, resistors onto the design circuit board, taking away the need for hand soldering or manual assembly. It works by passing each component through a nozzle that deposits solder paste onto it, before moving it into place on the circuit.
What is the difference between SMT & SMD?
An electrical component is mounted directly onto the surface of a printed circuit board in planar mounting called surface-mount technology.
On the other hand, SMDs or simply referred to as components, are miniature electronic components typically constructed using either a single-layer or multilayer semiconductor substrate.
What are the main SMT assembly steps?
The process involves a sequence of steps that begin with placing components on the printed circuit boards, followed by soldering, cleaning, testing, and completing the final package assembly. Once all components have been soldered, they must be cleaned to remove any leftover flux or contaminants.
Then, an electrical test is performed to ensure that all components have made good electrical contact and that no shorts exist in any of the connections.
Finally, post-solder processing such as encasing in plastic or attaching leads is carried out to complete the project’s package assembly.
What are the advantages of Surface Mount(SMT)PCB assembly?
1. Increased Reliability
Surface Mount PCB assembly offers increased reliability compared to traditional through-hole PCB assembly. The components used in SMT are more precise, giving better electrical performance and longer life expectancy.
2. Increased Efficiency
Surface-mount PCB assembly is much more efficient than through-hole assembly. This is because surface mount components can be placed much closer together, which results in shorter electrical paths.
3. Reduced Cost
In addition to being more efficient, surface-mount PCB assembly is also much cheaper than through-hole assembly. This is because surface mount components are typically cheaper than through-hole components and because the assembly process is faster and requires less labour.
4. Increased Flexibility
Surface mount PCB assembly is much more flexible than through-hole assembly. This flexibility comes from the fact that surface mount components can be placed on both sides of the PCB, which allows for a greater density of components.
5. Improved Quality
SMT components have better solder joint reliability due to the precision of the components and their higher lead counts. This results in fewer defective parts, fewer shorts, and improved signal integrity. Additionally, SMT’s high-precision manufacturing method allows for better repeatability and consistency, leading to higher-quality assemblies overall.
How much does an SMT assembly line cost?
The price of an SMT assembly line is heavily influenced by various elements, ranging from solder stencil making and pick-and-place SMT machine programming to reflow soldering, flux cleanup and quality inspection methods, it is important to consider each carefully before committing to a purchase.
Additionally, labour charges and bill of materials (BOM) lines must also be factored into the cost of an automated SMT assembly line, as these will vary depending on the type of components being used. It can certainly be difficult to calculate accurate costs in advance but with careful research into these various elements, businesses can ensure that they get the most cost-effective solution.
Considerations when choosing SMT assembly service
1. Cost
Cost is a paramount factor to consider when scouting for an SMT assembly service provider. From the number of components needed to the layout’s intricacy and time limits, there are various parameters that can affect your bill.
2. Capabilities
When selecting an SMT assembly service, it is essential to ensure that the provider has the ability and capacity to handle any complexity of product design or large orders you may require. Not all suppliers are capable, so be sure that your chosen one can meet all your needs.
3. Quality
Quality should always come first when choosing an SMT assembly service. Make sure that the service provider you choose is certified and follows the necessary industry standards.
4. Turnaround Time
Time is of the essence when selecting an SMT assembly service, depending on which provider you choose your order can be completed in days or take weeks and months.
5. Location
If you are located in a different country than the provider, there may be additional costs associated with shipping and customs clearance. So, it’s way too important to take location into your consideration.
What is SMT assembly?
What is an SMT assembly line?
A surface mount assembly line is a manufacturing process used to populate circuit boards with electronic components. It involves first the placement of a variety of small parts, such as capacitors and resistors, onto the board.
What is the difference between SMT & SMD?
An electrical component is mounted directly onto the surface of a printed circuit board in planar mounting called surface-mount technology.
On the other hand, SMDs or simply referred to as components, are miniature electronic components typically constructed using either a single-layer or multilayer semiconductor substrate.
Conclusion
We hope that this article has been beneficial in helping you learn about SMT assembly, particularly the difference between SMT and SMD. From the different steps of the SMT assembly process to the advantages and costs of setting up a line, we’ve now covered all of these aspects in detail.
To make an informed decision when choosing a service for SMT assembly, it is important to take into account factors such as the complexity of the design and the cost of tooling and materials. Keep these considerations in mind, and you will be sure to find an appropriate partner for your project.
