- Why is PCB green?
Why are most PCBs green? This is the most basic question. In fact, the circuit board itself is brown, and the green we see is the solder mask. The solder mask is not necessarily green, but green is the most common. As for why the green solder mask should be used, it is no longer possible to verify, but there are several rumors in the market. Some people say that this is a requirement for military applications in the past and is still in use today; some people say that this was the most popular resin and curing agent color at the time, and the laminate is also green, and all PCB layouts use them; others say this is because the human eye is right. The green response is bigger. In short, green has been used for a long time, and will continue to be used, although some companies allow users to choose other colors they need.
- Who invented PCB?
The original intention of inventing the PCB is to connect many components more conveniently, and its history can be traced back to the 1890s. However, the real inventor of PCB is Austrian inventor Paul Eisler. In Austria, Paul learned about the use of printing technology, and he wanted to try whether it was possible to install all the components on an insulating board using a printing process instead of manually connecting these components with wires. In 1936, in order to make a radio, he developed his own PCB. However, the PCB was not popularized at the beginning, and it was not used until the 1950s.
- How is the PCB designed now?
To manufacture a PCB, the layout design of the PCB must first be carried out, which is usually done through CAD (Computer Aided Design). CAD is used to draw the schematic diagram and design the layout of the PCB. Possible errors can be detected in advance before the PCB is manufactured. After testing and checking that the traces and positions of all components on the PCB are correct, manufacture the PCB according to the layout.