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  • Advantages of Laser Microscopes for Measuring the Roughness of Copper Foil used in 5G PCBs
    Nicknamed the mother of electronic products, printed circuit boards (PCBs) are critical to modern electronic devices in just about every industry. A key step in manufacturing PCBs is bonding copper foil to a dielectric resin substrate. Before bonding, the copper surface is intentionally roughened
  • PCB Fabrication Basics: How Traces Are Made
    Copper foil does not etch right angles to a board surface. Initially, only the exposed copper surfaces react and are washed away by the etchant, largely dissolving material perpendicular to the board surface. Then, as the etchant progresses from the etch resist layer to the substrate layer

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