Here Are Ten Interesting Facts about PCBs
There is no doubt that the printed circuit board (PCB) is a landmark tool in human technology. why? That’s because it’s hidden in every electronic device today. Like other great inventions in history, PCB has gradually matured with the advancement of the wheel of history. It has a history of 130 years of development. It is the most beautiful scenery in the wheel of the industrial revolution.
PCB has become a means of optimizing the production process of electronic devices. Those electronic devices that used to be hand-made have to be replaced by PCB, because more functions will be integrated on the circuit board.
Color
Even for some people who don’t know what a PCB is, they generally know what a PCB looks like. They at least look like they have a traditional style, and that is its green color. This green is actually the color that the solder mask glass paint transmits light. Although the name of the solder mask is solder mask, its main function is to protect the covered circuit from moisture and dust.
As for why the solder mask layer is green, the main reason is that green is the military protection standard. The PCB in the military equipment was the first to use the solder mask layer to protect the reliability of the circuit in the field, and green is the natural protective color in the military. Some people think that the color of the epoxy resin used in the original solder mask paint itself is green, so it has been used to this day.
Now the color of the solder mask layer is various, including black, red, yellow and so on.
Who Invented PCB First
If you ask who invented printing, the honor is Bi Sheng during the Northern Song Dynasty in China. But the earliest printed circuit boards need to be traced back to the concept of using ink to conduct electricity (printing brass wires on the base plate) in 1920 by the Austrian engineer Charles Ducas. He used electroplating technology to directly generate wires on the surface of the insulator to make a prototype of the PCB.
Originally the metal wires on circuit boards were brass, an alloy of copper and zinc. This disruptive invention eliminates the complex wiring process of electronic circuits and ensures the reliability of circuit performance. This process did not begin to enter the practical application stage until the end of World War II.
Printed Circuit Board Patents and Charles Ducas
Mark
There are also plenty of white markings on the green circuit board. For many years, people wondered why these white printed marks were called “screen layers”. They are mainly used to identify the information of the components on the circuit board, as well as other related content of the circuit board.
This information was first printed on the circuit board by screen printing, so it was called the screen layer, and now it is done using a special inkjet printer. This information can help circuit engineers to check for faults in the board.
Components
The function of the circuit board is mainly accomplished by effectively connecting the components according to the schematic diagram. Each component has its own unique function. Even two devices that are closely adjacent on a circuit board can be very different. The types of devices basically include resistors, diodes, transistors, capacitors, relays, batteries, transformers, and many others (such as fuses, inductors, potentiometers, etc.).
Everywhere
It is no exaggeration to say that PCBs are everywhere. From computers to digital clocks, from microwave ovens to televisions and stereo systems. As long as it is electronic items and equipment, there is a more than 99% chance that it contains a PCB. So we might take it for granted that no electronic device could function without a PCB.
NASA
Some groundbreaking technologies have been used in many projects of the National Aeronautics and Space Administration (NASA). Among them, in the 1960s, NASA used PCBs on the Apollo 11 rocket. This is because PCB-based electronics The device is light in weight and consumes little power. That was humanity’s greatest moment, sending astronauts to the moon for the first time. One of them is the credit of the PCB.
Surface Mount Soldering Technology (SMT)
Surface mount soldering technology has modernized PCBs. Compared with the previous jack mounting method, this surface mount soldering technology first uses special glue to paste the device on the PCB, and then electrically connects the device to the circuit board through special reflow soldering.
Rapid Prototyping PCB
In the process of local experiments on the circuit, the test can be carried out with the help of breadboards, perforated boards, and other general-purpose circuit boards. With the increase of surface packaging components, there are also new rapid PCB prototyping technologies, such as thermal transfer PCB, 3D printing multi-layer circuit boards, etc.
Flexible PCB
PCBs are not all straight and hard, and many soft PCBs work in many compact electronic devices, and they often form application circuits in many movable joints, or form multi-layer three-dimensional circuits.
the Largest PCB in the World
The world’s largest PCB comes from a flexible multi-layer circuit board used in an unmanned solar aircraft by Johnson Electronics in the UK. It is about 28 meters long. The circuit board made of soft polyimide as the base has better heat dissipation and higher conductivity density. Such a long circuit board is made by etching in sections through a special production process.
About Wonderful
Shenzhen Wonderful Technology Co., Ltd. is China’s top model and small batch circuit board manufacturer.
The company targets precision circuit board samples and small batches as the main target market. Since its establishment, it has adhered to the development concept of good quality and important reputation.
Invest huge sums of money to introduce advanced equipment, strictly regulate the operating standards and QC standards for incoming and outgoing materials, to ensure that the shipped products reach Seiko quality.
The self-developed ERP management system can realize the whole process of paperless operations such as online ordering, online payment, online production progress query, online logistics tracking, and online statistical report production, which greatly improves work efficiency.
It ensures that each order can be shipped quickly. After more than ten years of development, the company’s products and services have been well received by the market.
As well as the opening of an electronic component mall, integrated circuits, semiconductors, resistors, capacitors and other products are sold.
The company’s scale is developing rapidly, and the sample and small batch shipment capacity reaches 500 models/day.
The products are widely used in communications, medical equipment, industrial control products, aviation, military products, testing instruments,Automotive, computers and other peripheral products.
We will continue to pay attention to customers, with efficient delivery speed and perfect after-sales service, to become the most trusted brand supplier in the PCB industry.
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