The circuit board has a history of over 60 years since its invention. History has shown that without circuit boards and electronic circuits, flight, transportation, atomic energy, computers, aerospace, communication, home appliances... all of these cannot be achieved. The truth is easy to understand. Chips, ICs, and integrated circuits are the grain of the electronic information industry. Semiconductor technology reflects a country's level of industrial modernization and guides the development of the electronic information industry. The electrical interconnection and assembly of semiconductors (integrated circuits, ICs) must rely on circuit boards. As the author of Japan's "Circuit Board Collection", Masao Kobayashi, said, "Without computers and data, electronic devices are like an ordinary box; without semiconductors and circuit boards, electronic components are like ordinary stones." PCB is a promising industry in China, with double-digit growth rates every year. Many foreign orders are invested in China, and opportunities exist. For example, the motherboard in a computer is a circuit board, a graphics card is also a circuit board. In short, a circuit board is just a place to place parts and wires to complete electrical functions. Almost any electrical appliance has a PCB, and its production process generally includes: raw materials, screen printing, SMT machine, SMT reflow soldering, visual inspection, manual insertion, wave soldering, visual inspection, trial assembly and packaging.