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 Regarding Green Masking IN RF Circuit 

Last post Wed, Oct 7 2009 10:27 PM by redwire. 2 replies.
Started by Rakeshd2 18 Sep 2009 12:22 AM. Topic has 2 replies and 1463 views
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  • Fri, Sep 18 2009 12:22 AM

    • Rakeshd2
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    • Joined on Fri, Sep 18 2009
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    • Points 20
    Regarding Green Masking IN RF Circuit Reply

    Dear All

    We are into designing an RF circuit.I want to know if green masking on the both sides of board will do any good.What will be its effect?

    And what about impedance matching?Do we need to take some special care to achieve it?

    Thanks in advance.

     

    Regards

    RaKesh Kumar

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    • Post Points: 20
  • Wed, Oct 7 2009 11:09 AM

    • Cadpro2K
    • Top 50 Contributor
    • Joined on Thu, Jul 17 2008
    • san Diego, CA
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    Re: Regarding Green Masking IN RF Circuit Reply

    Short answer: No.

    Long answer: I'm doing RF design, and soldermask doesn't seem to affect performance, but it will depend on what you're designing. If it's a 'tuning circuit' or antenna, or something specific, soldermask may affect the performance. As for impedance, it won't make a difference.

    Good day.

    • Post Points: 20
  • Wed, Oct 7 2009 10:27 PM

    • redwire
    • Top 10 Contributor
    • Joined on Thu, Jul 17 2008
    • Allen, TX
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    Re: Regarding Green Masking IN RF Circuit Reply

    Cadpro2K:

    As for impedance, it won't make a difference.

     

    Absolutely affects impedance given two identical copper traces, one with mask, one without.

    Also affects propagation velocity but that may not be of concern.

    In general, I recommend mask over copper for protection.  Adjust the width accordingly to meet impedance requirements and you'll be OK.

    • Post Points: 5
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Started by Rakeshd2 at 18 Sep 2009 12:22 AM. Topic has 2 replies.