August 19, 2018
Printed Circuit Boards: What are They and How are They Used?
Printed circuit boards are the basis for many types of electronic and computer components and devices. PCBs for short printed circuit boards typically consist of 1 to 2 dozen conductive layers. Each layer is separated by a substrate, or an insulation layer, and then laminated to form a printed circuit board. Conductive layers are usually made of copper. Perforated holes are included in the plates, which are called “tracks”. These “paths” are galvanized or riveted to make the electrical connection.
Manufacture of printed circuit boards
To make printed circuit boards, they start with a substrate and then place a layer of copper on it. Then they “record” the layer to eliminate the copper that is not needed, leaving the adequate amount of copper area necessary for the application. Thereafter, the appropriate number of tracks or holes in the layers is drilled with a tungsten carbide drill or laser, depending on the size of the required pathways. All areas of the board where the components are placed will be bathed. Then, any text is printed on the board with a screen printing process. The plates are ready for the test. After testing the plate, the plate is ready for the components to attach the desired application, this process is called “fill”.
History of printed circuit boards
The inventor of the printed circuit boards was an Austrian engineer named Paul Eisler. He made the first printed circuit as part of a radio in 1936. Graduated from the University of Vienna in 1930, Eisler developed the radio while living in Hempstead, England. During the Second World War, Eisler was hospitalized in England for being an illegal alien. When he was released in 1941, he sought investors for his invention of printed circuit boards. The lithography firm Camberwell was interested and offered Eisler a contract, which he did not read before signing. The contract granted the rights of his idea to the company. Thereafter, he was able to obtain a patent for a printed circuit for many other applications in 1943. His invention was finally noticed by the US Army. That integrated the technology in bomb detonators to contain the German advances in the field. When the war ended, the government of the United States allowed access to technology for commercial use.
Uses and applications
When printed circuit boards were launched, they were used primarily in military and industrial applications, but today they are used as the basis for millions of components, hardware and devices, including computers, cell phones, radios, televisions and related devices which are mostly made in China, likewise the printed circuit boards are mostly made by PCB China manufacturers. If you have a device that is electronic anyway, you are likely to find a printed circuit board, large or small, inside. If you open almost any electronic device, computer or device, and find that family plate (sometimes red or blue) familiar with copper-colored lines and dots, you are using a printed circuit board.