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PADS: hatch vs pour

Discussion in 'CAD' started by John Larkin, Sep 19, 2003.

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  1. John Larkin

    John Larkin Guest

    Can anybody explain to me the difference between a copper hatch and a
    copper pour in PADS? The documentation seems to use different words to
    say the same thing about each one, and they look pretty much the same.

    Thanks,

    John
     
  2. William Lenz

    William Lenz Guest

    John Larkin
    Copper pour is that which exists before "copper pour" becomes "copper hatch"
    :eek:).
    You select a copper pour area then pour it, the result is copper hatch. When
    you save and close a board that has copper hatch then open it agian you'll
    see the hatch outlines. You'll have to use the Hatch command to fill them in
    agian. So the user can select where they want copper pour, Pads then
    generates the copper hatch. Copper hatch can then be edited or deleted. To
    go back to the original copper pour after you've see the hatch results (if
    you don't like it and want to change it) type "po" return.

    (note use the keepouts and the net rules "copper" section to set up your
    clearances and such)

    Hope this explained it :eek:)

    bill
     
  3. Mark

    Mark Guest

    Hatches usually are open in the middle, like the empty spaces between
    lines on graph paper. Pours are usually solid areas (no open spaces).
    Pours usually use the same algorithms as hatches; the line widths and
    spacings are altered to leave areas either open or overlapping. For
    example, 12 mil wide tracks on 10 mil centers would overlap to produce
    a "solid" pour area. 10 mil tracks on 30 mil centers would produce a
    hatch pattern.

    Mark
     
  4. and there are reasons for this.. it has been noted that some PCB
    manufacturers tend to gas.. gas under solid copper bubbles.. gas under a
    hatch 'farts'. Some materials are worse than others in this respect but FR4
    isn't one of them.. unless the PCB manufacturer has a problem.. in which
    case its usually seen by outgasing around pads & dry joints.

    Simon
     
  5. John Larkin

    John Larkin Guest

    On Thu, 18 Sep 2003 21:17:50 -0700, John Larkin

    Thanks for the comments. But it still seems to me that, if you play
    with the grid and line widths, you can make a pour hatch, or a hatch
    pour.

    Oh well... we'll just use pours and pretend that "hatch" doesn't
    exist.

    John
     
  6. so... let me guess... you've never heard of short cuts ???????

    Simon
     
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