Costs included in PCB assembly?

22 Nov, 2021

By hqt

A printed circuit board assembly is the process of attaching various electronic components to a printed circuit board to develop and complete a fully functional printed circuit board assembly. Basically, there are different types of PCB assemblies used in this process, one is surface mount structure, the other is through hole structure. Both of these methods have different advantages when used. Yes, surface mount technology does not have to occupy a lot of space. Nevertheless, both of these methods have their own strengths and weaknesses in the assembly process. Yes, how much does a PCB assembly cost? Is it?


PCBs are used to connect and support different electronic components using different conductive paths, methods, tracks and traces. These electronic components are effectively etched from copper onto non-conductive substrates. Moreover, once the PCB process is complete, the components are installed to manufacture these assemblies, the lead wires of the components are carefully inserted into the holes and surface mounting structure of the PCB. Finally, both types of component leads of this structure are mechanically secured to the PCB with the help of soft metal molten solder.

What is the importance of PCB assemblies?

These units are essential because they allow you to upgrade your electronics and gadgets without hassle. ..

Prototype PCB assembly refers to the process of attaching various electronic components to a PCB to complete a fully functional printed circuit assembly. Basically, there are two types of structures used in the PCB assembly process, surface mount structures and through-hole structures.

Differences between PCB assembly and PCB manufacturing

You may have heard that some manufacturers claim to be able to “manufacture” printed circuit boards. Other manufacturers claim they can “assemble” circuit boards. Yes, they Are you saving the same thing, or is there a difference between manufacturing a printed circuit board and assembling a printed circuit board?

In fact. There are differences. Printed circuit board assemblies mean that manufacturers assemble PCBs by soldering electronic components to the circuit board itself. Normally, such manufacturers have a design in which they work. There will be.

Manufacturing printed circuit boards is a much broader process than assembling circuit boards. , The manufacturer needs to design the printed circuit board and make a PCB prototype. Then the manufacturer can assemble the PCB.

PCB is a circuit board, PCBA is a circuit board plug-in assembly, added SMT and DIP processes.

PCBA is a finished board, while PCB is a bare board. Made of glass epoxy resin material. Depending on the number of signal laborers, it is divided into 4, 6 and 8 nori, and most commonly Make 4 Nori and 6 PCB.
PCBA may be understood as a finished circuit board, PCBA can only be counted after assembly on the circuit board is complete. ..

PCBA = printed circuit board + assembly.
In other words, the PCB blank board through the SMT, and then passes through the whole process of DIP plug, PCBA abbreviated.
Usually, the electrical connections between components on the insulating substrate The conductive pattern provided is called a printed circuit.
There are no components on top of the PCB, which is often a “printed circuit board (PWB).”

PCB assembly type

1. Surface mount assembly

Strong Points:

•• SMT, no drilling required, less mechanical stress than through-hole assembly.
•• SMT is a faster and lower cost manufacturing process than through-hole assembly. .
SMT, the component is the best assembly method in rich design, you can increase the number of connections per component than the through-hole assembly. ..

Cons: Disadvantages:

•• Repairing PCB prototypes and components assembled with SMT is more difficult than onboard ones assembled by through-hole soldering. ..

•• Normally, SMT components are not as high power or high voltage as through-hole components.

2. Through hole assembly

Strong Points:

• Through-hole soldering provides stronger mechanical coupling than any other technology.
• Through-hole soldering is the best technique for connectors, transformers, electrolytic capacitors, and other circuit board components.
• Through-hole soldering is considered a reliable process in SMIT for many military or aerospace products.

Cons: Disadvantages:

Through-hole soldering requires drilling holes in the bare circuit board, which makes the process more time consuming than SMT.
Through-hole soldering is more expensive than using SMT.
Through Hole mounting may not allow as high a component density as SMT. Through hole mounting often requires manual soldering, which is less reliable than the reflow oven used in surface mount PCBA. Is believed to be.

3. Mixing technology (SMT and through-hole soldering)

Strong Points:

Generally, this method is used for more complex boards that combine some surface mounting and some drilling, and is ideal for your own PCB layout. ..

Cons: Disadvantages:

PTH components cost more than usual and take longer to assemble.

Printed circuit board assembly process

Step 1: Solder paste stencil

The first step in a PCB assembly is to apply solder paste to the board. This process is the same as screen printing a shirt. A thin, stainless steel stencil is placed on top of the PCB, except in place of a mask. This allows the assembler to apply solder paste only to specific areas that will become the PCB. These parts are where the components are placed on the finished PCB. ..

Step 2: Pick and place

After applying the solder paste to the PCB board, the PCBA process moves on to the pick and place machine. The robot device places a surface mount component or SMD on the prepared PCB. SMDs include most non-connector components on PCBs today. These SMDs are soldered to the surface of the board in the next step of the PCBA process. ..

Step 3: Reflow soldering

Once all the solder paste and surface mount components are in place, they need to stay there. This means that the solder paste needs to solidify. Adhesion of the components to the board. PCB assembly, and This is completed through a process called “reflow”. After the picking and placement process is complete, the PCB board is transferred to a conveyor belt. This conveyor belt goes through a large reflow oven. This oven consists of a series of heaters that gradually heat the board to ambient temperature 250 degrees Celsius. Or 480 Fahrenheit. It melts the solder in the solder paste. It's hot enough for.

Step 4: Inspection and quality control

You see, once the surface mount components are soldered after reflow, the function of the assembled board should be tested. Normally, the movement during the reflow process is; poor connection quality or complete lack of connection. Moreover, shorts are also a common side effect of this movement, because misplaced components can connect parts of the circuit that should not be connected.

Step 5: Insert through-hole component

Depending on the type of board under the PCBA. The board can contain various components other than regular SMD. These include plated through-hole components. Or PTH components. Plated through-holes are holes in the PCB that are plated on the board. PCB components use these holes to send signals from one side of the board to the other. In this case, the solder paste would be of no use, because the paste would go straight through the holes without sticking.

Step 6: Final inspection and functional test

After the soldering step of the PCBA process is completed, the final inspection tests the function of the PCB. This inspection is a “functional test”. The test gets the PCB at its pace, the normal situation where the PCB works. And finally, while the tester monitors the electrical characteristics of the PCB, this test passes the power and the simulated signal through the PCB. ..

Affecting PCB assembly costs

Every electronic technician or designer wants to know how to get the best quote for a PCB assembly, what price affects the cost of the PCB assembly and how to manage the price of the PCB assembly. Here are some tips on how to do it. .Estimating a PCB assembly. First, a clear understanding of the attributes for the cost of a PCB assembly (PCBA). The biggest cost factors are: :
1. Assembly type
2. I like
components 3. Total number of components (SMD + DIP)
4. Package size of
components 5. Component package 6) Required process
6. Quantity and batch size (s)
8. Special parts Preparation requirements (ie. Lead length, minimum / maximum height, spacing)
9. Total cost of BOM
10. Bareboard (PCB) layers and materials
11. Coating
12. Potting
13. Assembly compliance
14. Test requirements (RayMing) I prefer to test all PCBA boards before shipping. Please tell me how to test
15. Shipping
16. Delivery (MOKO Technology provides quick turn PCB assembly service)
All 16 hints affect the price of the PCB assembly, so you can choose the best one to save cost, because when procuring parts, you can provide multiple component sources for each component. , You can easily control the cost. Not only from Digikey, some agents support one person's component at a strong price.

How to reduce PCB assembly costs

With the improvement of technology, the cost of all production is increasing. The rate of return is increasing. When looking for a high quality product suitable for the application, the cost can be even higher. But you are clear. Want to reduce your spending on your expenses, without compromising quality. Is that possible?

As technology is constantly changing, electronics companies are constantly facing problems while trying to reduce costs. Electronics are constantly evolving into increasingly complex products, to meet consumer demands. That's why technology companies are evolving to find new processes to develop the products that end users demand. ..

In this blog, you will learn about the most popular electronic product, the PCB assembly. It is considered an important component of almost all types of electronics. Despite such common components, PCB assemblies are very expensive, because the manufacturing process required to build them is very complex and complex and requires a lot of components and effort. If your application contains a large number of PCBs, purchasing such an expensive PCB can be a problem. But you can't compromise on quality to reduce cost. So what are you supposed to do? The goal is to reduce the cost of PCB assembly without sacrificing quality. We need to approach a Chinese PCB assembly maker. One such maker is MOKO Technology.

Here are some tips that PCB assembly makers can use to reduce the cost of PCB layout manufacturing. ..

  • Understanding its size can lead to more efficient paneling of boards. The more boards you have per panel, the lower the cost per board, square with a standard 18 "x 24" manufacturing panel. Or you can use a rectangular board.
  • Standard Fr4 material can be used-% or 1 oz. Copper, and 1/16 inch PCB thickness.
  • They may aim to use .010 1 inch or more holes to keep costs down, as the size of the holes in the board really makes a difference.
  • They may minimize schematic and parts list changes to further reduce costs. Faster turnaround times are more expensive: therefore they give enough time for turnarounds. maybe.
  • Contains all the necessary information about layout guidelines, schematic files, reference layout design, mechanical requirements for submitting files for pricing to minimize costs.

How to reduce europepcb technology PCB assembly cost

MOKO Technology has created a pricing schedule based on various factors that determine the cost of a PCB assembly. Some customers call us to better understand the factors related to assembly pricing. .. , Factors that cause price differences include PCB dimensions, part type and quantity. Soldering method, inspection type, etc.

europepcb Technology can help you reduce costs with such ideas, europepcb Technology offers a variety of services with EMS capabilities in product design, so they are early in the process. Can be involved to proactively process all kinds of decisions to keep costs down. , System architecture. Value engineering, manufacturing, logistics and all sorts of necessary tests done to provide clients with the highest quality PCB assemblies.

europepcb Technology provides lead-free assembly according to your specifications. We own two additional production lines dedicated to lead-free assembly. We are RoHS compliant, state-of-the-art soldering How to apply. Prices may fluctuate due to lead-free assembly. However. Please contact our sales representative for actual costs. .
Depending on the type and size of the components to be selected, also determines the cost of the final PCB assembly. Prices may vary even if you specify leadless parts, BGA, etc., OFN, etc. In addition, costs may vary depending on the package size (eg. 0201, 1206, etc.) with the specified inspection method. Similarly.

Europepcb technology has a variety of inspection methods, including in-circuit and functional tests, available to ensure high-quality PCBs. The following tests are possible: visual inspection for basic quality verification, lead X-ray testing of less devices and blank PCBs. Of course, there is also an AOI test to test the use of solder paste, missing components, and polarity. Our test is completed at no additional charge.


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