There are many types of circuit boards with different names, which can be named based on materials, layers, inherent characteristics, and other aspects. For example, there are: single panel, double-sided board, multi-layer board, HDI, fast board, FR4 circuit board, ceramic circuit board, alumina ceramic circuit board, aluminum nitride ceramic circuit board, circuit board, PCB board, aluminum substrate, high-frequency board, thick copper board, impedance board, PCB, ultra-thin circuit board, ultra-thin circuit board, Printing (copper etching technology) circuit boards, etc. Circuit boards are miniaturized and intuitive, playing an important role in the mass production of fixed circuits and optimizing the layout of electrical appliances Printed circuit boards (PCBs) are essential accessories in modern electronic equipment. All electronic devices, whether they are large machinery, personal computers, communication base stations, mobile phones, household appliances, or electronic toys
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