PCB Blog - What is the function of the main PCB board?

A main pcb board is a flat plate that provides mechanical support for electronic components.It uses conductive pads to receive terminals for components and flat surfaces and cables to connect terminals for components.

The function of the main PCB board

1.The boards have two main functions. The first method is to install electronic components at specific locations on the outer layer. Secondly,it provides electrical connections between component terminals. At the same time,the main PCB serves as a platform, and electronic components are carefully installed within it.

2.The main PCB board is the building block for most electronic devices. In addition, the PCB can be single-sided, double-sided, or multi-layer. It is a flat insulating material characterized by copper foil laminated on the substrate. Moreover, this board connects electronic circuits. The board uses electroplated copper conductors. These conductors pass through holes called vias.

3. In addition, the main PCB board can have multiple layers of copper. The complexity of a single board depends on the number of layers and the degree of interconnection between layers. Multi-layer main PCB board provides better Signal integrity and more routing options. However,the manufacturing cost of PCB is very high. Moreover, this is time-consuming.

Double-layer PCBs are very easy to manufacture. This is because both sides are made of copper.However,the multi-layer board incorporates an additional internal copper layer. Compared to a two-layer board, a four-layer circuit board has more routing options.

Materials Used for Main PCB board

The commonly used materials for manufacturing the PCB substrate include substrate, copper, and solder mask.

1) Substrate

The board can use flexible or rigid substrates. This depends on the PCB application. In addition, the rigid master pcb uses polyimide or FR4. However, the flexible main pcb uses high-temperature polyimide film.

2) Copper layer

The copper layer is a coating or foil applied to one or both sides of a PCB. The purpose of the copper layer is to provide electrical signals between components on the circuit board.

3) Solder mask

Resistance welding is another main material used for the main PCB board. This material can protect PCBs. Therefore, its function is PCB skin. Solder resistance film is a protective material made of polymers.

4) Silkscreen

This material is also known as the nomenclature. It is usually laminated on the component side of the main PCB board. In addition, the silk screen layer helps to represent logos, settings, and symbol switches.

The manufacturing process of the main PCB board

1) Developing images of circuits through photographic tools or direct imaging.

2) Remove excess copper from the inner layer. This helps reveal mats and traces.

3) Develop PCB stacking by laminating PCB materials through pressure and heating.In this step,the prepreg is necessary as it helps with the bonding process.

4) Drill holes and install holes through holes and pin holes.These holes help to enhance the placement of components through PTH technology.

5) Apply a solder mask. Solder shielding uses ultraviolet radiation.In addition,apply a solder mask to the entire surface of the board to weld the metal pad.

6) Add surface finish to the board. There are various surface finish options for your PCB Ensure you use the appropriate surface finish for your board.

7) Check and test the circuit board for defects or errors. This stage is crucial as it ensures the functionality.

Main pcb assembly is the installation of electronic components, connectors and other assemblies onto the main circuit board according to the rules of the design drawings in order to build a complete electronic circuit. The main circuit board (Main PCB) is the heart of an electronic device and is responsible for connecting and supporting all electronic components to ensure that they can communicate with each other and function properly.

The process of assembling a main circuit board (PCB) is a complex and important step that involves several critical links.These steps ensure that the circuit board is fully functional and highly reliable. The following are the key steps in the assembly of a main pcb:

1.Design File Preparation

Prior to formal assembly, the board design documentation first needs to be obtained and reviewed.This phase,known as the Design for Manufacturability (DFM) check,is designed to analyze the functionality and manufacturability of the design and identify any potential problems or design errors.

2.Material Preparation

Prepare the required materials and components, including PCB substrates,electronic components,soldering materials (e.g., solder, solder paste) and fluxes.The quality of these materials directly affects the quality of the subsequent assembly.

3.Solder Paste Printing

The solder paste is evenly applied to the soldered areas of the board.This step is usually done using a solder paste printer to ensure that the proper amount of solder paste is applied to each solder joint.

4.Component Placement

Electronic components are accurately placed onto the pre-printed solder paste by automated equipment such as a mounter. This process increases the speed and accuracy of assembly.

5.Reflow Soldering

After component placement is completed, the PCB enters the reflow soldering stage. This process places the board into a reflow oven where the solder paste is heated and melted to firmly solder the components to the substrate.

6.Inspection and Testing

After reflow soldering is completed, the board needs to be inspected in detail and functionally tested to ensure the quality of the solder joints and the correctness of the connections. This process can be performed by visual inspection, automated optical inspection or X-ray inspection.

7.Through-hole component insertion

For boards that require insertion of through-hole components, these components are inserted into the PCB either manually or using wave soldering. This step ensures that the signals from the components can be passed from one side of the board to the other.

8.Final Inspection

After all soldering and insertion work has been completed, the board is subjected to a final thorough inspection, including functional and electrical characterization tests, to ensure that all components are functioning properly.

9.Cleaning

The soldering process leaves a flux residue, so the board must be thoroughly cleaned before delivery to the customer. This can be accomplished by washing in deionized water and drying with compressed air.

The main PCB board is the core component of electronic devices.Without this PCB plate, electronic devices cannot function.Therefore,it is very important in the production of electronic products.