You don't necessarily need to know all two or three things about PCB!

Printed circuit boards (PCBS) are ubiquitous in our lives. pcb stackup calculator But how much do you really know about PCBS. Why is the printed circuit board green, who invented it, and what are the white lines on the board? What do you know about printed circuit boards?! Here are 10 things you may not know about PCBS!

Printed circuit boards (PCBS) are ubiquitous in our lives. But how much do you know about PCBS? 1 oz vs 2 oz This article lists 10 things about PCBS that you may not know!

Why is the PCB green?

Why are most PCBS green? That's the basic question. In fact, the circuit board itself is brown, and the green we see is the solder resistance film. The solder mask is not necessarily green, but green is the most common. As for why the green solder mask is used, there is no way to verify it, but there are several rumors. Some people say that this is the requirement of the military application in the past, and it is still used today; Some people say that this is the most popular color of resin and curing agent at that time, laminate is also green, and all PCB layouts are green; Others say it's because the human eye reacts more to green. In summary, 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 PCB was to connect many components more easily, and its history can be traced back to the 1890s. However, the real inventor of the PCB was Austrian inventor Paul Eisler. In Austria, Paul learned about the use of printing technology, and he wanted to see if it was possible to mount all the components on an insulating board through the printing process, rather than manually connecting these components with wires. In 1936, he developed his own printed circuit board to make radios. However, PCB was not popular at first, until the 1950s, the use of PCB began to increase.

How is PCB designed now?

To make a PCB, you must first carry out the layout design of the PCB, which is usually done through computer-aided design (CAD). CAD is used to draw schematics and design the layout of PCBS, which can detect possible errors in advance before the PCB is manufactured. After testing and checking that all components on the PCB are wired and positioned correctly, the PCB is manufactured according to the layout.