What is the 2-layer PCB assembly technique

What is the difference between single-sided and double-sided assembly plates?
These two PCBs are widely used in different types of electronic products. From computers, smartphones, radio controls to other everyday consumer electronics, PCBs are an integral part of the electronics we use in our daily lives. However, single-sided and double-sided PCBs have different uses and are manufactured differently.
Single-sided PCBs are part of many different types of electronic products, while double-sided PCBs are commonly used in more advanced technologies. Depending on the output and cost, the manufacturer selects the PCB type.
 typically have only conductive metals and components mounted on one side of the board. Conductive wiring, usually made of copper, is used to connect via the other side. Double-sided PCBs are a bit complicated. They have components that are mounted on both sides and the wiring spans both sides. It is difficult to produce, but its disadvantages outweigh the shortcomings and labor-intensive processes.
PCB assembly and manufacturing process
Are the stages that form part of the assembly and manufacturing process. Solder paste needs to be applied, and then the components are placed on the circuit board, which is then soldered, inspected and tested. All these steps are carefully designed to ensure the best quality of the final product. Here’s more information about what you need for each step:
Solder paste

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This is the first step in the assembly process. This solder paste needs to be applied to those parts of the solder plate. Typically, these are component pads. Solder paste is a mixture of small particles of solder and flux. This can be deposited to a specific location using a process similar to the printing process.
Then use a solder screen to place it directly on the board and in the correct position. A runner rushes across the screen, spraying a small amount of paste onto the board. Since the screen is generated from a PCB file, its apertures are exactly the same as the component pads on the board.
Pick and place
Next, pick and place. It is known as a machine that helps to put components together with a circuit board. Once the board with solder paste is ready, it passes through the machine. The machine has already loaded the components. It will use the distributor to position the components in their respective areas on the board.
Due to the tension of the solder paste, the elements will remain together. In some assembly processes, small dispensing is also used. However, this is a practice commonly used for wave soldering plates. Practicality shows that the use of glue can make any type of repair work difficult. However, some of the glue will degrade during the welding process.
weld
Now that the slurry has been added and the components are placed on the board, it’s time for them to solder. This is done by passing them through the welding machine. In this part of the process, some circuit boards also pass through the wave soldering machine, but are not widely used in surface-mount assemblies. When using wave soldering, the solder paste is lost. Reflow soldering is more common than wave soldering in modern manufacturing.
examine
After welding the plates, check them. For surface mount components, manual inspection is not possible. In this regard, automated optical inspection is more practical. Machines typically check the circuit board to detect connectors, component placement, and whether the correct components are placed.
Test
After inspection, the board is tested to make sure they are in normal working condition. As a result, they tested it in a number of ways. There are many instruments used to test circuit boards, including analog multimeters, oscilloscopes, digital  (DMMs), frequency meters, pulse generators, etc.
feedback
Finally, to ensure that the entire process remains correct, feedback from the current batch will re-enter the process. This helps keep processes and components up and running to ensure efficient processes.
The process is checked to find errors, and any failures detected in these steps are investigated. The inspection phase is an ideal time to spot problems. As a result, defects can be quickly detected and re-corrected.

Advantages of double-sided SMD boards
Double-sided SMD boards have two main advantages over a single panel:
1。 Since the board has two-sided mounting elements, the component density is high. This means that the board can carry more components, but does not take up space because there are two sides. Therefore, this makes the process of laying the track much easier.
2。 The second advantage is the increased heat dissipation due to the addition of a copper layer. During etching, the copper is removed to form a track, but then reinserted rather than leaving it completely behind.
Common uses for double-sided 
Single-sided PCBs are commonly used in a variety of electronics and applications, including camera systems, printers, radio equipment, calculators, and more.
Similarly, double-sided PCBs are also widely used in a variety of electronic products, including lighting systems, vending machines, amplifiers, automotive dashboards, and more.
conclusion
In conclusion, both single-sided and double-sided are important – but in different applications. They serve different purposes because both boards are built in different ways. Again, their costs are different for the same reason. Depending on the application, cost and other factors, the manufacturer can decide single-sided or double-sided.
If you are not sure which board you need, then contact us we will be happy to go through your requirements, provide the best way to meet your needs and ensure that you get a high quality PCB board