The history of pcb circuit boards

  Pcb circuit board (circuit board)-pcb circuit board (circuit board) raw material, copper clad laminate is the substrate material for making printed circuit boards. It is used to support various components, and can achieve electrical connection or electrical insulation between them. A pcb circuit board (circuit board) is a printed circuit board (Printed circuit board, pcb circuit board (circuit board)), which is simply a thin board with integrated circuits and other electronic components. It will appear in almost every electronic device Among them, according to a recent report by Time magazine, China and India are among the most polluted countries in the world. In order to protect the environment, the Chinese government has been strictly formulating and implementing relevant pollution remediation rules, which have spread to the pcb circuit board (circuit board) industry.

   Many cities and towns are no longer allowing the expansion and construction of new pcb circuit board (circuit board) factories. For example, a small amount of high-precision handcrafts are used in Xinghua, Jiangsu, such as Hongguang Electronic Circuit Board Factory in Xinghua, Jiangsu, and batches are used outside the customs. Mainly equipment production. Jiangsu has specifically designated four cities and towns as production bases for “polluting industries”, and it is forbidden to build new factories outside the designated areas. If there are electronic parts in a certain device, they are all mounted on pcb circuit boards (circuit boards) of different sizes. In addition to fixing various small parts, the main function of the pcb circuit board (circuit board) is to provide the electrical connection of the upper parts.

 As electronic equipment becomes more and more complex, more and more parts are needed, and the circuits and parts on the pcb circuit board (circuit board) are becoming more and more dense. The bare board (no parts on it) is also often referred to as “Printed Wiring Board (PWB)”. The base plate of the board itself is made of materials that are insulated and heat-insulated, and not easy to bend. The small circuit material that can be seen on the surface is copper foil. The copper foil was originally covered on the entire board, but part of it was etched away during the manufacturing process, and the remaining part became a network of fine lines. These lines are called conductor patterns or wiring, and are used to provide circuit connections for parts on pcb circuit boards (circuit boards).　

  Usually the color of pcb circuit board (circuit board) is green or brown, which is the color of solder mask. It is an insulating protective layer that can protect the copper wire and prevent parts from being welded to the wrong place. A silk screen is also printed on the solder mask. Usually words and symbols (mostly white) are printed on this to mark the position of each part on the board.　　In order to fix the parts on the pcb circuit board (circuit board), we solder their pins directly on the wiring. On the most basic pcb circuit board (circuit board) (single panel), the parts are concentrated on one side, and the wires are concentrated on the other side. In this way, we need to make holes in the board so that the pins can pass through the board to the other side, so the pins of the parts are welded to the other side. Because of this, the front and back sides of the pcb circuit board (circuit board) are called Component Side and Solder Side respectively.　　

  If there are some parts on the pcb circuit board (circuit board) that need to be removed or reinstalled after the production is completed, then the socket (Socket) will be used when the part is installed. Since the socket is directly welded to the board, the parts can be disassembled and assembled at will.　　

    If you want to connect two pcb circuit boards (circuit boards) to each other, generally we will use the edge connector commonly known as “golden finger”. There are many exposed copper pads on the golden finger, which are actually part of the wiring of the pcb circuit board (circuit board). Generally, when connecting, we insert the golden finger on one of the pcb circuit boards (circuit boards) into the appropriate slots on the other pcb circuit boards (circuit boards) (generally called the expansion slot Slot). In computers, display cards, sound cards or other similar interface cards are connected to the motherboard by golden fingers.　

 The printed circuit board etches the complex circuit copper wires between parts and parts on a board after careful and neat planning, and provides the main support for the installation and interconnection of electronic components. It is indispensable for all electronic products. The basic parts.　　

      The printed circuit board is a flat plate made of non-conductive materials. The flat plate is usually designed with pre-drilled holes to install chips and other electronic components. The hole of the component helps to electronically connect the pre-defined metal paths printed on the board. After the pins of the electronic component pass through the pcb circuit board (circuit board), then the conductive metal welding rod is attached to it. The circuit is formed on the pcb circuit board (circuit board).　　

      According to its application field, pcb circuit boards (circuit boards) can be divided into single-sided boards, double-sided boards, multi-layer boards with more than four-layer boards, and soft boards. Generally speaking, the more complex the functions of electronic products, the longer the loop distance, and the more the number of contact pins, the more layers the pcb circuit board (circuit board) requires, such as high-end consumer electronics, information and communication products, etc.; The soft board is mainly used in products that need to be bent: such as notebook computers, cameras, automobile instruments, etc.