Tips in Creating a Printed Circuit Board Assembly Diagram Gretchen Hill

Lots of people who are looking to purchase printed circuit boards want to create their own designs. However, it is important to remember that in order to obtain the best quality, one must have sufficient knowledge of how to assemble printed circuit boards. Whether you want to fabricate them on your own or you simply need to know how this process is done, this guideline that we have prepared for you can certainly be of great help.
Printed Circuit BoardThe printed circuit board assembly diagram is like a plan that you are required to make before you can begin placing silicone by hand. They are highly important since they serve as pictographic guides. These diagrams will help you remember the exact components that go on specific pads and locations by the time you are assembling them. It is a good thing especially for beginners to know that there are CAD tools that can help them create these diagrams with ease.

Switching on the correct layers that are required to generate your printed circuit board assembly diagram is the first step you have to take. Simply look for the layer setting on the CAD program you chose to use.

Generally, a single-sided board is the most ideal design you can start with, especially if you are just creating your first prototype assembly. It is important to turn off the unnecessary layers on your options.

You only need to turn on a couple of them such as the value indicator for the components, the dimension which defines the orientation of your PCB by providing an outer geometry, and the top silkscreen layer where you can usually find the part orientation indicators.

The pads must also be active –

The surface mount components will be given context and orientation through it. It is also important to have the layer that indicates the center location of the components you have. You would also want to turn on the assembly or engineering notes if you have an option for that on the program you choose to use.


The layers have different names on different programs so if you happen to read a certain guideline that tackles a specific CAD program, you should be cautious when using a different one. The part value labels must be adjusted after these steps. They should not be overlooked as in most cases, they will still have the wrong size based on the scale of your printed circuit boards or will still face the wrong direction.

The next thing to do is to detach the value label from the part –

This will allow you to resize, move and do whatever you want on them separately. When you have already done this, you can then resize the part values according to what best fits the scale of the printed circuit boards. In various programs, there will be certain layers that you should turn off while doing this in order to avoid modifying them accidentally. The silkscreen layer is one of them.

It would be best to use a CAD program that is user-friendly

There are a few programs that will help you organize the labels after resizing them. In some CAD programs, you will be able to move the part labels one by one. Some of them have indicators that will help you determine as to which component a certain label belongs to so you can easily put them back to place. You have the option to rotate the labels if you want to.

Remember to consider the scale of your PCBs –

You can judge whether you’ve done things right simply by looking at your diagram. You can ask a professional in case you want to be certain about it. It is ideal to print it out and simply grab an analog copy of it. The next step, if you want to proceed is the printed circuit board assembly. After that, you can then place each of your components. These are entirely different from just designing your PCBs and we recommend that you leave this work to the professionals.

Keep in mind that not all of the CAD programs are reliable for this matter. Additionally, though these factors and guideline are quite enough in order to create a printed circuit board assembly diagram, there is still a lot to learn to ensure the quality and functionality of the product especially when dealing with a more complex system. If you need a manufacturer that can assure you of producing high quality PCB assembly, simply contact us today.

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Tips in Creating a Printed Circuit Board Assembly Diagram