PCB industry was first developed in the 20th century and is developing continuously. PCB has made great contributions to the development of electronic industry. For example, it has led to the emergence and development of small electronic components with very high performance, such as resistors

We will discuss printed circuit boards, their uses, and the step-by-step process of making them. In addition, it will help you learn and find the PCB that suits your needs

1。 What is a printed circuit A printed circuit is the basis of many electronic devices. These PCBs are the mounting surfaces of other basic devices, whether they are simple printed circuits or the most complex circuits

For example, resistors, capacitors, semiconductors, transistors, and diodes require PCBs to work

2 Why to use printed circuit board

PCBs are standard because they have many advantages. These panels are usually compact in design and light in weight; Therefore, it is used in many modern electrical equipment. In addition, PCBs are critical for very complex systems. This is because these boards are easy to use and maintain. In addition, these boards are cost-effective because their production costs are much lower

Some common PCB markets include:

Aerospace

The continuous progress of aerospace technology requires the use of compact but complex circuit boards. Due to the lack of connectors, flexible and rigid flexible combinational circuits have excellent durability and viability

The small size of available PCBs makes it easier to use the best medical devices. For example, medical hearing aids mainly use PCB technology

When it is necessary to reduce the complexity of equipment, rigid flexible composite plates are essential. These boards usually do not require more space for flexible cables and connectors

(Printed circuit board of notebook computer)

PCB technology is revolutionary in industrial and commercial markets. The Board of Directors has changed everything from manufacturing to supply chain management. In addition, using these boards, it is easy to use automatic devices to boot the device. This method not only improves the output, but also reduces the labor cost

Most of the military equipment and machinery of the army will be greatly impacted. Like any other market department, military equipment also integrates PCB technology. These devices require mechanical and electrical performance. For example, soft packaging and hard packaging need to be modified. Both package types can withstand continuous shock and vibration without damage

(Electronic printed circuit board) 3. What is a PCB? Printed circuit board materials are glass fiber/plastic substrate, solder resist, copper and naming ink

Plastic substrate/glass fiber

Manufacturers can use flexible or rigid surfaces when manufacturing PCBs. These two surfaces depend entirely on the PCB design required for the project. Importantly, a hard surface requires polyamide fiberglass or FR4. At the same time, high temperature polyamide film and other flexible materials are used on the flexible surface. Some common non-conductive substrates for flexible panels include polyamides, liquid crystal polymers, polyethylene, and polyesters. In addition, these substrates provide a non-conductive surface on which all conductive circuits operate

copper

Copper wire has very high conductivity. The plastic substrate used has thin copper traces on all plastic surfaces. However, for multilayer PCB, the structure is different. The multilayer film has alternating copper layers as conductive materials of insulating materials

Resistance welding

Soldering resistance is a fluid, usually applied to the outer layer of rigid printed circuit boards. Importantly, its job is to cover copper sheets to prevent them from oxidation. In addition, when all components are on the circuit board, the liquid will retain and control the flow of molten solder. When the liquid solder flows out of the surface, it is possible to connect two adjacent circuits to form a short circuit. It is worth noting that the solder resist has a typical green color. However, other colors such as blue, white, red, and transparent can also be used

After applying the solder mask, the next step is to print the barcode, identification information and marks. These tags are nomenclature. Crucially, jargon helps achieve accurate PCB assembly

4. Printed circuit board type

The following are the three most common pcbs with different material properties

What is a printed circuit: rigid pcb

The rigid pcb type consists of a rigid fiberglass substrate. This feature makes PCB cheap and practical. However, it is not flexible. Unlike flexible PCB, rigid PCB has lower production cost. However, their versatility is very poor, so it is difficult to adapt to some equipment design practices

What is a printed circuit: flexible PCB

This PCB has an excellent flexible substrate. Importantly, this feature makes them versatile and can be installed in devices with strange shapes. These boards are adaptable and have no specific shape. In addition, unlike rigid pcbs, flexible pcbs have higher heat resistance

What is a printed circuit: rigid flexible pcb

The rigid flexible pcb reduces the weight and size of the circuit board by compactly including electronic interconnects in the circuit board. In addition, this type of PCB is durable, sturdy and flexible, combining rigid PCB and flexible PCB

Excellent quality of (an empty circuit board) 5. What is a printed circuit: PCB design factors and processes

PCB has many different design types. Understand the design process

PCB working environment

PCB flexibility

PCB assembly and installation

Required PCB configuration and number of technologies

The type of application the PCB will run

(High frequency printed circuit board)

6. What is a printed circuit: how to make a PCB step by step

The following steps will help you develop the correct PCB

First, the copper layer is chemically imaged, and a small path is etched to connect electronic components. Second, the copper layer is laminated with a bonding material that can also be used as insulation. Next, electroplating and drilling are performed on the PCB to electrically connect all copper layers. Then, the path of the outer layer of the circuit board is imaged and the outline of the circuit board is covered with solder resist for electroplating. Then, a naming mark is printed. Finally, after these steps are completed, By processing the circuit board according to the size in the perimeter file, you can install components (microchips on PCBs) on the PCB.