Two-layer or double-sided PCB is a kind of PCB that has conductive copper layers present on both sides of the board. So, double sided PCB has two sided paths or traces i.e. they have a bottom layer and a top layer. These are very useful in many electronic applications because we can connect the circuits on one side of the board on the other side of the board. We can do this by drilling holes on the board. We use it in many industries for implementing intermediate and complex circuits. They allow for closer routing traces in comparison to single layer PCBs. So, they have a prominent role in the manufacturing of modern electronic products.
Manufacturing of Double Sided PCB
- The manufacturing of double-sided PCBs is quite similar to the single layer PCBs. However, there are some exceptions i.e. certain layers are laminated on both sides of the desired board.
- We use insulating material for making the base of the double-sided PCB. It is also known as the substrate. We mainly use epoxy resins and fiberglass for this purpose. The kind of material you use will determine the extent of flexibility or rigidity of the PCB.
- In the case of double-sided PCB, we laminate copper foil on both sides of the substrate.
- Also, the solder mask is placed on both sides of the board and is placed above the copper foil. So, this provides the necessary protection.
- We use a silkscreen on both sides of the board above the solder mask. So, the prime purpose of this is to add characters and symbols on the PCB. Therefore, it helps ordinary people to understand the functionality of the board.
- The layers which we use for manufacturing double-sided PCB are also present in the manufacturing of single layer PCB. However, in double-sided PCB these layers are present on both sides of the board in comparison to single layer PCB where these layers are placed only on one side of the PCB.
Advantages of Double Sided PCB
- Double-sided PCB offers improved flexibility and ease of use. Therefore, it is an ideal choice for manufacturers of electronic products.
- These boards have increased density as compared to the single layer boards. However, it costs less than the multilayer PCBs.
- Smaller board size in comparison to single layer PCB. This eventually leads to a reduction in overall manufacturing costs. This also helps in designing smart and lightweight electronic devices.
- It allows you to sink and source current. This means that a double-sided PCB allows you to provide current to other slaves or shields. This is because double sided PCB has two layers i.e. bottom and top layer. We may use the bottom layer of two-layer PCB as a ground copper pour.
- Incorporate more components than a single layer PCB. If you are to incorporate a large number of components on a single layer PCB then you will have to increase its size. However, in two-layer PCBs you can achieve this by placing the additional components on the bottom layer.
- Warmth scattering is another favorable benefit of using double sided PCB. The additional copper layer allows for better warmth scattering and hence improves the performance of the board. We can accomplish this in the drawing procedure by expelling enough copper to make the tracks. It will leave the additional copper instead of totally evacuating it.
Applications of Double Sided PCBs
There are numerous applications of double-sided PCBs. We can find them in Computers, TVs, Digital Cameras, Radios, Cell Phones, and other electronic gadgets. They have many industrial applications as well and we will look at some of them.
- Medical devices
Modern medical equipment consumes less power and is denser than it was in the past. Therefore, we need such PCBs which have small size and large surface area because this will help us in incorporating more electronic components. Double sided PCB is ideal for this as it has two layers and we can incorporate electronic components on both of them. This way we get the desired properties of both the lightweight and little sizes. Therefore, we use it in a number of medical devices such as the CAT scanner and X-ray scanner.
- Mechanical Systems
We often use PCBs for control processes in heavy-powered mechanical systems. Single layer PCB has a small density and doesn’t suit the performance requirements in such conditions. Therefore, we need denser PCBs and double-sided PCB is a viable option. They can incorporate components like high-current battery chargers, modern load analyzers, and engine controllers.
We widely use LEDs because of their improved productivity and low power consumption. We often use LEDs where we need them to frequently turn on and off. This means that there are high current and voltage cycles. So, we can’t use ordinary PCBs because they can’t withstand the generated heat. Double sided PCB is suited for this because they have two insulating layers. These PCBs will act as warmth sinks and can withstand elevated temperatures of heat exchange.
- Automotive and aerospace
Both of these industries frequently rely on adaptable PCBs. We use double sided PCB in both the automotive and aviation ventures because they can withstand high-vibrations which are normal to their surface. To simply put, they can withstand forces which are exerted on them from both the top and bottom layer. On top of this, double sided PCB is very lightweight. So, they are ideal for using them in transportation applications.
MOKO Technology is a well-known entity when it comes to the manufacturing of Printed Circuit Boards (PCB). We have years of expertise and we specialize in the manufacturing of double-sided PCBs. We have a well-trained staff, a dedicated R&D team, and a state-of-the-art setup. This allows us to boast mass production capability. We provide premium quality PCBs which will meet your requirements. We can also manufacture custom made PCBs as per your needs. Feel free to reach out to us if you have any questions or if you want a quote. We are hoping to hear from you soon.