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How to Etch a PCB with PCB Etching Process Steps

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  • How to Etch a PCB with PCB Etching Process Steps

    PCB board etching is one of the major steps in the chemical processing of subtractive printed circuit board. It is the removal of copper, to achieve the desired circuit patterns. In PCB etching process, all copper is removed except the circuitry that is protected by the tin plating applied during the previous treatment in PCB manufacture. The tin is then stripped and the copper is cleaned and the newly prepared circuit is ready for solder mask.

    Types of PCB Etching Process
    Typically, the PCB etching process can be divided into two types: chemical etch and laser etch.

    Chemical Etch
    Chemical etching is usually done with ammonium per sulphate or ferric chloride
    For PTH (Plate-through Hole), additional steps of electroless deposition are done after the holes are drilled, then copper is electroplated to build up the thickness, the boards are screened, and plated with tin/lead. The tin/lead becomes the resist leaving the bare copper to be etched away.

    Laser Etch
    A new process creating new standards and the demise of the chemical process is plasma etch. In addition to no etch-back, this process also eliminates imaging, or film error using a direct imaging process, which transfers the layer image directly to the material.

  • #2
    Quickturn PCB Assembly Service

    Prototype PCB Assembly may be a method that needs data not simply of PCB elements and assembly however conjointly of computer circuit board style, PCB fabrication and a powerful understanding of the ultimate product. board assembly is simply one piece of the puzzle to delivering the proper product the primary time.


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