2. It is crucial to ensure that no air is trapped between the layers of the PCB. The use of Eagle circuit board design software is indispensable in the manufacture of multilayer boards.
3. This process is quite complex; it typically begins with preparing the schematic diagram. Then, you use the editor menu in Eagle software to modify the schematic.
4. You might wonder why most circuit board layers appear uniform. It is important to note that preparing even-numbered layers is generally more cost-effective than preparing odd-numbered layers. This explains the uniformity in the layers.
5. Multilayer circuit board
6. In the production of multilayer circuit boards, both core materials and prepregs are used to create the layers. Prepregs are uncured materials, making them malleable.
7. The prepreg and the core material substitute are then laminated together under high temperature and pressure, causing the prepreg to solidify. After cooling, the layers are bonded together to form a strong and durable multilayer board.
1. Please note that multi-layer circuit boards have a wide range of advantages, including:
Increase flexibility
Higher assembly density
Controlled impedance characteristics
Small size
Capable of EMI shielding
Eliminating the need for interconnected wiring harnesses, thereby reducing overall weight
2. Multi layer pool process
The multi-layer PCB manufacturing process involves using Eagle software to design circuit boards. This is a complex process, starting from completing the schematic diagram. The schematic can be edited through the Eagle software’s editing menu.
3. Multi layer pool
After designing and drawing the schematic, the next step is layout; This can be accomplished by importing the dimensions of the printed circuit board and uploading them to the software.
If you use Eagle software, you will have the opportunity to select the appropriate grid to help each circuit board layer overlap. This can be done through a button that wires each layer separately according to your needs.
Alternatively, you can use Eagle software to automatically create multi-layer pools for circuit boards. However, if this technique is chosen, it is necessary to cross check components, text, layers, and dimensions.
Then, you should use the check rule option to evaluate the final layout.
4. Multi-layer circuit board
Multilayer printed circuit boards have become the core of electronic products worldwide. They are the basic functions of components and wiring; This makes the new circuit board more advanced and complex.
It provides advanced flexible options and multiple choices for end users. The circuit board used for simple electronic products is composed of a single layer, while the complex circuit board used for computer motherboards is composed of multiple layers; That’s why they are called multi-layer circuit boards.
It should be noted that advanced technology enables manufacturers to significantly reduce the size of circuit boards.
A multi-layer circuit board is a circuit board made of at least three layers of copper foil. They look like several single-sided or double-sided circuit boards, glued together by heat and protective insulation. These two layers are usually placed on the surface of the circuit board.
The electrical connection between layers is achieved through blind holes and through holes, etc; This has led to the emergence of complex circuit boards of different sizes in the market.
Multilayer circuit boards were discovered in the changing electronic world. Their continued use and functionality in the modern electronic world have made them more complex and sophisticated.
Initially, there were many issues with the circuit board, including crosstalk, capacitance, and noise. Therefore, manufacturers must impose specific restrictions to control the problem.
Design consideration means carefully designing the circuit board to achieve high performance levels, including double-sided circuit boards. This understanding led to the discovery of multi-layer circuit boards.
It enables multi-layer circuit boards to be packaged in small sizes to meet the growing demand for electronic products.
The number of layers in modern circuit boards ranges from 4 to 12. The number of layers is generally even to reduce warping issues associated with odd layers.
In addition, compared to building circuit boards with different layers, producing circuit boards with even layers is more cost-effective.
In addition, most modern devices, including smartphones and mobile devices, use 12 layer circuit boards. Some manufacturers can even produce circuit boards with about 32 layers.
Please note that although manufacturing multi-layer circuit boards requires a significant amount of labor and cost, they are becoming increasingly important in the modern world.
The reason is that they bring many advantages compared to double-layer or single-layer circuit boards.
5. The advantages of multi-layer PCB
They are small in size, which is the best feature of multi-layer circuit boards. They are smaller than single-layer or double-layer circuit boards, which is beneficial for the current trend.
They are more compact and sturdy, widely used in laptops, smartphones, and tablets. Lightweight (lightweight structure).
Smaller circuit boards reduce weight by not requiring multiple connectors to interconnect double-layer and single-layer circuit boards. This improves the mobility of the applied devices.
High quality. Creating multi-layer circuit boards requires thorough planning and organization, which means the final result will be a higher quality product than double-layer or single-layer circuit boards. In addition, these circuit boards are more reliable.
Improved durability. Multilayer circuit boards are very durable. They can withstand a large amount of weight and withstand the heat and pressure during the bonding process. There are multiple layers of insulation materials and intermediate adhesives between these circuit boards to enhance durability.
Highly flexible. The circuit board assembly personnel using flexible construction technology ultimately obtained flexible multilayer circuit boards with very ideal characteristics, such as being able to be applied to areas that require bending and buckling. However, it is worth noting that the more layers a circuit board uses, the lower its flexibility.
More powerful. A multi-layer circuit board combines multiple layers into a single unit circuit board. Therefore, they provide circuit boards with stronger connectivity and give them some characteristics that enable them to achieve higher speed and capacity even in small sizes.
Single connection point. Multilayer PCBs work in a single unit, so they always have only one connection point. This is not the case when using multiple single-layer or double-layer circuit boards. This is a major advantage for the electronic world as it helps to minimize size and weight to the greatest extent possible.
