polygon pours

Discussion in 'Homework Help' started by fran1942, Jul 8, 2011.

  1. fran1942

    Thread Starter Member

    Jul 26, 2010
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    Hello, I am just starting out with creating PCB's using software.
    I have come across the term 'polygon pour'. Is that just when you cover the whole PCB with copper which has gaps around each component and tracks ?

    If someone could just give me a brief rundown on exactly what 'polygon pours' are and when you would or would not use them, it would be greatly appreciated.

    Thanks
     
  2. Georacer

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    Nov 25, 2009
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  3. SgtWookie

    Expert

    Jul 17, 2007
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  4. Georacer

    Moderator

    Nov 25, 2009
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    Another nice thing with pours is that they leave you with less copper to etch, speeding up the process.
     
  5. SgtWookie

    Expert

    Jul 17, 2007
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    Along with less copper to etch, one of the big benefits is power and ground planes.
    Straight wires or straight traces of a fixed width have inductance, the smaller/narrower and longer the wire or trace is, the greater the inductance.

    But, an infinite plane has virtually no inductance. A copper pour can act more or less like a partially infinite plane. Of course, it's best if you have complete layers dedicated to power and ground, but that's generally not possible for a hobbyist making boards at home.
     
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