In people's lives, most people may not have heard of multi-layer circuit boards or PCB proofing, and even think that these have nothing to do with themselves and cannot be touched, but in fact, circuit boards are widely used in our lives. Like TVs, computers, mobile phones, keyboards, display screens, remote controls, fans, air conditioners, etc., as long as we can see the items that can be powered on, they are basically inseparable from circuit boards. It can be seen that PCBs have gradually become people today. a very important thing in life.

　　So what materials are PCBs made of? A simple PCB consists of a piece of fiberglass material clad with copper foil, or copper foil attached to both sides of the board. For multi-layer boards (boards with more than two layers of copper -) in order to build a solid board between the individual copper layers, a piece of prepreg material is often placed between these cores. A prepreg material is similar to the core material, but the material has an adhesive attached so that it adheres to the top and bottom of the inner layer.

　　Regarding the welding layer of the multilayer circuit board, when our engineers design the multilayer circuit board, including the engineers of the multilayer circuit board production factory, they often encounter some problems about the solder mask of the multilayer circuit board when processing the documents. So what role does solder mask play on PCB boards? Solder mask is a material used to coat multilayer circuit boards. The purpose of coating is to: prevent multilayer circuit boards from being damaged by the surrounding environment; electrically insulate multilayer circuit boards; prevent soldering from occurring. Bridge; protect components mounted on multi-layer circuit boards; prevent circuit boards from being affected by heat from components mounted on PCB boards.

　　Because different types of multilayer circuit boards have different sizes and thicknesses after coating, some standards do not consider solder mask an adequate insulator.

　　When it comes to soldering, the pads also need to be understood. The large and small pads that appear on the multi-layer circuit board are of different shapes. They are mainly divided into two types: surface mount pads and through-hole soldering. plate. Surface mount pads are square or rectangular copper areas on a PCB that are used to mount components. The size and shape of the surface mount device depends on the component that is mounted or soldered to the pad. Most component manufacturers recommend pad sizes based on their components.

　　For the entire design of the PCB, it is determined by the specific application and the task determined by the designer. The design process can be simply defined as designing the specifications of the multilayer circuit board, or it can be defined as including the requirements of the environment, enclosure, connection and installation and implementation into the process of designing the multilayer circuit board. First of all, the functions and drawings, whether the multilayer circuit board has a size limit, if not, the size of the multi-layer circuit board can be determined by the components on the circuit and the area they occupy. This also provides engineers with a way of working. Engineers can create circuits and feed them into schematic-only programs. Of course, it is best for engineers to make necessary modifications according to the process capability, manufacturing quality and speed of the multi-layer circuit board manufacturer during design, and then pass the data to the manufacturer.

　　When the multi-layer circuit board manufacturer gets the gerber file provided by the customer, it selects the required material and the specified material, and processes the multi-layer circuit board to produce a board that matches the designer's drawings.

　　Sometimes it is necessary to mount components on a multi-layer circuit board in an automatic way. At this time, the circuit board and components will be sent to the integrator. At the integrator, the components are mounted on the circuit board. Take it back to the engineer to test and develop it.

　　The product of PCB multilayer circuit board has now quietly penetrated into our lives, bringing us a lot of convenience. Most people cannot do without it. Therefore, for the development and innovation of PCB multilayer circuit boards Functionality is critical.

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