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PCB What is the use of printed circuit boards?

PCB is a board that connects electronic components,They are part of the electronic products we use in our daily lives in all walks of life. They are made of non-conductive materials and have wires, pads and other functional parts etched from copper sheets, which can be electrically connected to the electronic components in the product. Components such as capacitors and resistors are also soldered on some PCBs.
Nowadays, PCBs are widely used in electronic products, and there are many types of PCBs. They can be single-sided, double-sided or multilayered. They can be rigid, flexible, or contain rigid and flexible components.

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Type of assembly process
There are two main methods used for PCB applications: through-hole mounting and surface mounting.
1. Through hole installation
During the through-hole mounting process, the assembler puts the component leads into the holes drilled into the bare PCB. This technology is the original technology used for PCBs.
Through-hole technology produces stronger connections than surface mount technology, so it can be used in applications requiring high reliability. This is because the leads run through the entire circuit board instead of being fixed with solder as in surface mounting. Through-hole technology is also useful for testing and prototyping that require manual adjustment of components.

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2. Surface mount
During the surface mounting process, the components are directly mounted on the PCB surface using solder. This method was developed in the 1960s and became popular in the 1980s. Today, it is the most commonly used component installation method. Surface mount boards use small components called through-holes instead of through-hole components to connect the various layers of the PCB.
Using surface mounting allows the assembler to fix the components on both sides of the circuit board. Surface-mounted components can also be smaller, allowing more parts to be mounted on one board. This reduces costs and has made electronic devices smaller and smaller over the years. Compared with through-hole mounting, surface mounting can also be completed faster and involves fewer processes, thereby further reducing costs.

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