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FR4 Circuit Board Manufacturing

    • 2108 posts
    January 19, 2021 12:30 PM EST
    FR4 is a glass epoxy laminate, most commonly used in PCB (printed
    circuit board). It is used in various flexible printed circuit boards
    and other semi-rigid variants. It shows excellent high strength and
    flame retardancy. Easy to integrate applications and allow component
    installation make it the preferred material for most PCBs.To get more
    news about fr4 board, you can visit pcbmake official website.



    Fiberglass board is impregnated with epoxy resin. These sheets are
    used to build the FR4. Eight of these reinforcements are covered with
    copper foil. The entire structure is then placed in a press and then
    bonded to a FR-4 sheet.



    The glass in the FR-4 plate makes it very strong. Unless otherwise
    specified, the epoxy resin used is usually flame retardant. Bromine is
    used to impart flame retardancy to epoxy resins. This makes the whole
    PCB flame retardant. This is critical in most applications associated
    with high temperatures.



    The copper used helps designers and manufacturers to etch patterns
    onto PCB. These etched patterns form the basic circuits that connect the
    various components. It also connects the interconnector to the basic
    circuit. The interconnector is used to connect the layers of a PCB.



    Dicyandiamide, also known as “dice”, is the most commonly used
    material to harden epoxy resins. The maximum allowable temperature is
    300 ℃. If a phenolic material is used to cure epoxy resin, it is called
    “non succinic acid”. Its maximum temperature tolerance is 350 ℃.



    The FR-4 can be used for single or multi-layer PCB of surface mount
    components. From a manufacturing point of view, the FR-4 is easy to use.
    Therefore, it provides designers with great flexibility to take
    advantage of the inherent characteristics of materials, thus bringing
    benefits to applications and processes.