What is PCB? _?

The success of any creation often depends on its foundation, whether it is the strength of character, the depth of architectural foundation or the scope of roots. Similarly, the success of any electronic equipment depends on its foundation. The motherboard of any electronic equipment can be used as a playground and host, receiving various forms of electrical signals and performing certain functions for the equipment. Whether it is the communication signal between the North Bridge and the computer processor or the simple switching signal in the routine school project, the effectiveness of the design depends on the function provided by the substrate itself.

Printed circuit boards can not only connect electronic components with etched copper wires, but also provide mechanical strength. Printed circuit boards, or rather, printed circuit boards can be found in almost all commercial products as building blocks of packaging media.

A PCB is a composite of organic and/or inorganic dielectric materials, which has multilayer wiring interconnections and also accommodates components such as inductors and capacitors. Without standard printed boards, each printed board is unique, which is often the function of the product itself. Almost every link of PCB design has industrial standards, which are controlled by IPC, such as IPC-2221General Standard for PCB Design.

PCB evolved from the electrical connection system developed by 19 in 1950s. The first batch of printed circuit patents were issued in 1903. Albert Hansen explained that laminated foil conductors are laminated on insulating plates. 19 13, Arthur Berry applied for the patent of "printing-etching" method, and Max Shep applied for the patent of spraying metal on the board through a mask. As early as 1904, Thomas Edison experimented with electroplating conductors on linen paper with chemicals, but the method of electroplating circuit patterns was finally patented by Charles Duquez in 1927. As early as 1925, Charles Ducas applied for a patent, and he invented a technology of manufacturing circuits directly using templates and conductive ink.

World War II witnessed the invention of circuit boards that can withstand shooting. However, Paul isler invented the first PCB in 1943. He invented a method of etching conductive circuits on copper foil, which was bonded to a non-conductive substrate reinforced by glass. This method remained dormant until the late 1950s, when transistors were introduced into commercial applications. Wires on electronic components led to the development of "through-hole" technology, in which holes were drilled on the PCB, and the components were connected to the circuit board at these spot welds. 196 1, American company Hazeltyne applied for a patent. However, this process is a bit expensive and wasteful, because all the extra threads are cut and not used much. Nowadays, with the increasing demand for smaller and higher density circuits, "surface mount" technology is gaining momentum.