What do you know about PCB...
Printed circuit boards (PCBS) are ubiquitous in our lives. But how much do you really know about PCBS? 1oz vs 2oz Here are 10 things you may not know about PCBS!
1. Why is the pcb green?
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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 welding mask. Solder masks are not necessarily green, but green is the most common. As for why the green welding mask was used, it is impossible to prove, but there are several rumors. Some say this is a requirement of previous military applications and is still used today; Others say it was the most popular resin and hardener color at the time, and the laminate was green for all PCB layouts. Others say it's because the human eye is more sensitive to green. how to test a circuit board with a multimeter 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 want.
2. Who invented 2? A PCB?
The original idea for the printed circuit board was to make it easier to connect many components, dating back to the 1890s. But the real inventor of the PCB was Austrian inventor Paul Eisler. In Austria, Paul learned to use printing techniques and wanted to see if he could use a printing process to connect all the components to an insulating board instead of manually connecting their wires. In 1936, he developed his own PCB to make radios. But PCBS didn't become popular until the 1950s.
3. How about that? Now designing PCB?
To make a PCB, you must first design the layout of the PCB, which is usually done through computer-aided design (CAD). CAD is used to draw the schematic and design the layout of the PCB, and we can detect possible errors in advance before manufacturing the PCB. After testing and checking that the wiring and position of all these components on the PCB are correct, the PCB is manufactured according to the layout.
4. What is SMT?
In printed circuit board production, you sometimes hear the word SMT. Surface Mount Technology acronym sMT uses automated technology to attach components to printed circuit boards, which is the most common technique used in printed circuit board manufacturing. In PCB manufacturing, the through hole method is initially adopted. Due to many errors, SMT gradually replaced the through hole method.
5. There are no power lines on Route 5.5. A PCB?
Beginners may not know that PCBS are actually connected without wires. This is interesting because most electrical devices and technologies require wires to connect it. PCB uses copper wire instead of wire directly through the device and connects all components. If a wire connection is used, it may take up too much space, and fortunately it is now possible to make extremely complex PCB boards that do not require wire connections, thus saving a lot of space.
6. What is the white printing line on the pcb?
We often see a white print on the PCB, have you ever wondered what they are? These white printing lines are actually used to mark components and print important PCB information on the board, called "screen printing". It can be screen-printed on the board or printed on the PCB with an inkjet printer.
