Question

You are starting a new job at a plant that makes computer boards. You  are responsible for putting the components on the board and also to do soldering.   What should you be oriented on? What do you feel is key to your success at this new job? Why?

Answer 1

Nowadays Printed circuit Boards are widely used for making computer borads. So will go throgh the entire process how to manufacter computer boards.

The actual process of how a PCB is made can be complicated, and involves the use of a manufacturer, also called a fab house by some. These fab houses will take all of the completed design files that an engineer hands off to create a PCB in its physical form. While the entire process is deserving of its own blog post, we’ll keep things simple with a brief outline of how a PCB comes to be:

1. Step 1 – Creating a fiberglass foundation. A manufacturer will first make the inner fiberglass layer (core) that all of the other layers of copper, solder mask, etc.. will be applied to.
2. Step 2 – Adding copper layers. With the fiberglass foundation in place, a manufacturer will then add copper foil on both sides of the fiberglass.
3. Step 3 – Adding copper patterns. Next, a laminated sheet of the PCB design is laid on top of the copper, which shows where all of the copper traces need to be.
4. Step 4 – Defining copper patterns. The laminated sheet and copper are then exposed under a UV lamp and covered with a photoresist film, which etches the traces into the copper foil.
5. Step 5 – Bathing the board. Now that the copper traces are in place, a PCB will then be given a chemical bath that removes all of the unwanted copper, leaving only the copper traces that an engineer designed.
6. Step 6 – Protecting with solder mask. A protective layer of solder mask is applied, giving a PCB its traditional green color while protecting it from short circuits.
7. Step 7 – Adding silkscreen. To finish up, white silkscreen is added which will help to know exactly where components need to go on a PCB. At this stage, the PCB is considered complete as a “bare board,” meaning it has no parts attached yet.
8. Step 8 – Adding components. The bare board is then taken through an assembly process where various components like resistors, integrated circuits, capacitors, etc. are attached. Once complete, this is the PCB in its final form that you’ll see in all of your electronics at home.

Soldermask. This stuff is what gives a PCB its traditional green color and is applied over the copper layers. You might also find PCBs in red or blue; it’s the designer’s choice! Solder Mask holds an outstanding job of keeping all of the copper traces insulated from each other so no accidents can occur like short circuits.

Thanks