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Stack-up doubts: Track thickness + Copper filling percentage

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  • robertferanec
    replied
    Dear Giovanni, yes, it's a typo, should be width.

    Leave a comment:


  • gmezzina23
    replied
    Dear Robert,

    first of all, thank you for your reply.



    Originally posted by robertferanec View Post
    - Hmm .. I only see pdfs, I can't find what spreadsheet you mean, but it looks more like a typo and should be probably width.
    For sake of completeness, please find attached the "incriminated" spreedsheet @step4 in https://welldoneblog.fedevel.com/201...m-pcb-stackup/

    Sincerely,
    Giovanni


    Leave a comment:


  • robertferanec
    replied
    - % of copper is how much surface is covered with copper and how much is without copper. That can for example influence the final thickness of prepreg (during PCB manufacturing prepreg melts and it goes between tracks - so if less surface has copper, thinner the final thickness will be)

    - Hmm .. I only see pdfs, I can't find what spreadsheet you mean, but it looks more like a typo and should be probably width.

    Leave a comment:


  • Stack-up doubts: Track thickness + Copper filling percentage

    Hi guys,

    I was checking the spreadsheet available here https://welldoneblog.fedevel.com/201...your-projects/

    In the Impedance Requirements table, it says "Please, use maximum SE55 track thickness on L1 & L6 < 6mil (0.15mm)".
    What means "track thickness" in this context? Does it mean the thickness of the layer foil or the track width (and it is simply a typo)? (In the suggested stack up, the thickness is set 0.5 oz on L1)

    I was also checking the Stackup n. 6 here (https://welldoneblog.fedevel.com/201...your-projects/)


    What does it mean with "% of copper in layout"? Why 90% is selected?


    Sincerely,
    GM
    If you have had to create your own stackup, then you know it takes some time to come up with something good. In this post I would like to share our the most used stackups. Feel free to use them in your projects. Hope it helps. 1. High Density Stackup Number of Layers: 12 Number…
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