Rabu, 14 Agustus 2013

Manufacturing Of PCB Boards Explained

By Andrea Davidson


The world today seems to run on so much technology, that it seems to be ever present. Technological advances throughout the years have made everyone's lives so much easier. Yet despite all of this amazing technology most people have absolutely no idea how such things work. This is because the field of electronics can be quite complex. It is electronic components that are used during the manufacturing of PCB boards.

For most people, whenever electronics are mentioned, their eyes begin to cross. They don't really need to know how things work, they just need to be able to use it when they wish to. Thankfully there are some people who do actually understand these things.

There are so many things, which an individual uses on a daily basis, that rely on electronic components. These components need to be laid out in a set manner for the item to operate as required. Were you to open one of these devices you would see how this gets achieved.

These electronic items are all placed on something called a printed circuit board. More often than not they will be either a pale brown colour or green. On one side you will see shiny metal tracks. These tracks are used to allow electrical power to only go where it is meant to.

There are basically two types of Printed Circuit Board. Depending on the density of components and the tasks they are asked to perform will dictate which type will be used. These two types are known as surface mount or through board.

Either type requires a steady hand and a good eye. The other requirements can be taught, but without the other two elements, populating a printed circuit board becomes very difficult. One thing that has to be successfully taught is the identification of these electronic components and how they will be fitted.

The through board is the most likely type that people will come across. It does have certain advantages. The components are all situated on the other side to the metallic tracks. The component's legs are fed through the board, hence the name. The legs are soldered to the metal tracks which conducts power through the component and also holds them securely in place. The legs are clipped to prevent them sticking trough too far, and possibly becoming a short circuit. The components are of a size that enable easier handling.

The surface mount board has the components mounted actually on the tracks. The components themselves are a lot smaller, and are more difficult to handle. A lot of the assembly work for this type is carried out under strong magnification and bright lighting. The magnification is necessary to prevent possible short circuits.

Once all of these components are secured in their correct positions the board is then given a conformal coating. This will prevent any stray dust bridging across any of the component legs, or the tracks. Hopefully you will now have more of an understanding about some of the things which need to happen during the manufacturing of PCB boards.




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