Who Created PCB
PCB（ Printed Circuit Board), the Chinese name is printed circuit board. Because it is made by electronic printing, it is also called “printed” circuit board.
The creator of PCB is Austrian Paul Eisler（ Paul eisler)。 In 1936, he first used printed circuit boards in radios. In 1943, Americans mostly applied this technology to military radios. In 1948, the United States officially recognized that the invention used for commercial purposes. Printed circuit boards widely used since the mid-1950s. Printed circuit boards will appear in every electronic device. If there are electronic parts in a certain device, they will embedde on PCBs of different sizes. The main function of PCB is to make various electronic components form the connection of predetermined circuits. PCB has the function of transmission and is the key electronic interconnect of electronic products. In addition, it also known as the “mother of electronic products”.
PCB(printed circuit Board, or printed circuit board for short, is one of the important components of the electronic industry. Almost every kind of electronic equipment, from electronic watches and calculators to computers, communication electronic equipment and military weapon systems. As long as there are electronic components such as integrated circuits, printed boards should be used in order to make the electrical interconnection between various components. The printed circuit board is composed of an insulating base plate, connecting wires and pads for assembling and welding electronic components. It has the dual functions of conductive line and insulating base plate. PCB can replace the complex wiring and realize the electrical connection between the components in the circuit.
PCB not only simplifies the assembly and welding of electronic products, reduces the wiring workload under the traditional mode, and greatly reduces the labor intensity of workers; Moreover, the volume of the whole machine is reduced, the product cost is reduced, and the quality and reliability of electronic equipment are improved. Printed circuit board has good product consistency. It can adopt standardized design, which is conducive to mechanization and automation in the production process. At the same time, the printed circuit board can be used as an independent spare part to facilitate the exchange and maintenance of the whole product. At present, printed circuit board has been widely used in the production of electronic products.
Printed circuit boards were first used as paper-based copper-clad printed boards. Since the emergence of semiconductor transistors in the 1950s, the demand for printed boards has increased sharply. Especially with the rapid development and wide application of integrated circuits, the volume of electronic equipment is becoming smaller and smaller. The density and difficulty of circuit wiring are increasing, which requires the printed board to update continuously.
At present, the variety of printed boards has developed from single panel to double-sided board, multilayer board and flexible board; The structure and quality have also developed to the degree of ultra-high density, miniaturization and high reliability; New design methods, design supplies, plate making materials and plate making processes are emerging. In recent years, the application software of various computer aided design (CAD) printed circuit boards has popularized and popularized in the industry. Among specialized printed circuit board manufacturers, mechanized and automatic production has completely replaced manual operation.
Printed circuit boards widely used downstream. ]Including consumer electronics, automotive electronics, semiconductor packaging, network communication, industry, medicine, aerospace and other fields. From the downstream demand side, driven by the rapid development of new energy vehicles, the demand for automotive electronics has increased significantly. In addition, consumer electronics and semiconductor packaging are also big demand ends. The long-term logic of the game between China and the United States remains unchanged. The independent research and development of domestic science and technology will form a huge dividend, and the demand for PCB is also huge.
From the perspective of the development prospect of China’s PCB industry, the overall prosperity of China’s PCB industry from 2020 to 2024 is high and in the stage of steady growth. The compound annual growth rate is about 5%, and the growth rate will further improve for leading enterprises.
As the most common substrate / substrate material of PCB, FR-4 usually exists in many electronic devices and is also the most common intelligent manufacturing. FR-4 (PCB) made of glass fiber and epoxy resin and combined with laminated copper cladding. Some of its main applications: computer graphics card, motherboard, microprocessor board, FPGA, CPLD, hard disk drive, RF LNA, satellite communication antenna feed, switching mode power supply, Android mobile phone, etc.
With the rapid development of printed circuit board industry, it plays an important role in medical equipment, industrial equipment, lighting, automobile and aerospace industry. What are the specific aspects of PCB board.
1： Application of PCB in medical equipment
Nowadays, the rapid progress of medical science is closely related to the rapid development of electronic industry. Many microbial equipment and other equipment are separate basic PCBs. Such as pH meter, heartbeat sensor, temperature measurement, ECG machine, EEG machine, nuclear magnetic resonance imaging machine, X-ray, CT scanning, blood pressure machine, blood glucose level measurement equipment, incubator and other medical equipment.
2： Application of PCB in industrial equipment
PCB widely used in manufacturing industries. Especially those with high-power mechanical equipment. Which drive by high-power circuits that require high current. Therefore, a thick copper layer presse on the upper layer of the PCB, which is different from the complex electronic PCB. The current of these high-power PCBs is as high as 100 amps. This is especially important in arc welding. Large servo motor driver, lead-acid battery charger, military industry, clothing cotton machine and other applications.
3： Application of PCB in lighting
We see the surrounding LED lights and high-intensity LEDs. These small LEDs can provide high brightness light and installe on the PCB Based on aluminum substrate. Aluminum has the property of absorbing heat and dissipating it in the air. Therefore, these aluminum circuit boards usually used in LED lamp. Such as circuits, medium and high power LED circuits.
4： Application of PCB in automobile and aerospace industry
Our most common reverberation caused by the movement of aircraft and cars uses a kind of reverberation called flex The PCB of PCB is to meet these high force vibrations and make the PCB flexible. Flexible PCB is light, but can withstand high vibration. Because of its light weight, it can reduce the total weight of spacecraft.
Even in a narrow space, flexible PCB can adjuste, which is a great advantage. These flexible PCBs used as connectors and interfaces.And it can assemble even in a compact space, such as behind the panel, under the dashboard, etc.