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restrict inner layers

Former Member

hello,

 

is it possible to do a restrict in the inner layers like the

toprestrict/bottom restrict layers 41/42 ?

 

please give some advice or tips

 

kind regards, tjeerd and steven

 

 

 

  • Am 26.04.2011 09:28, schrieb Tjeerd vd Elshout:

    hello,

     

    is it possible to do a restrict in the inner layers like the

    toprestrict/bottom restrict layers 41/42 ?

     

    please give some advice or tips

     

    kind regards, tjeerd and steven

     

    >

     

    Hi,

     

    for the inner layers, there is no specific Restrict layer, as it

    is the case for top and bottom layer.

    With a simple geometry of the restricted area you could draw the

    polygon in a way that the free area is not covered. You could also

    use several simple polygons that may overlap (they have the same name)

    in order to compose the copper area.

    If the geometry of the restrict area is more complicated, you could

    draw the contour of it with WIRE and use very fine line width (eg 0.01mm).

    The polygon respects the minimum distance given in the Design Rule to

    this wire, and if the parameter ORPHANS = off is set, the area inside

    will be kept free of copper.

     

    Another option:

    Draw a polygon that has the same shape as the restricted area and

    set its Rank = 1. All other polygons in this layer must have a higher

    rank (for example 2). Thus all other polygons have to respect the

    "restrict" polygon. Check the name of the polygon and draw a small

    wire with the same name anywhere outside the polygon (it must not be

    reachable for the poylgon). If the polygon has set the property

    Orphans = Off, it can't be calculated and the area remains free.

    Although the contour of the polygon is shown in the layout editor, it

    is no problem at all for data output with the CAM processor. The

    outline wires of the polygon do not appear in the manufacturing data.

     

     

    --

    Mit freundlichen Gruessen / Best regards

    Richard Hammerl

      CadSoft Support -- hotline@cadsoft.de

      FAQ: http://www.cadsoft.de/faq.htm