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Split plane is reflected in wrong layer in gerber file

vinodkaruvat

Hi,

 

I am designing a 4 layer board - SIgnal1,GND,Vcc and Sig2. In the VCC layer I have 2 planes viz - VBAT and VCC. I have given the split using the line "L" command and drawing a 1mm thick line. The planes seem isolated and look good. Kindly refer the image below. The layer is Internal Plane 2.

 

image

 

The Internal Plane 1 just above it looks like -

 

image

 

The above is the internal Plane 1  which is GND layer. It looks fine.

Now, I generate the Gerber files and check them on view mate -

GPI - internal plane 2 and GP1 - Internal plane 1. So, GP2 layer is as shown below -

 

 

image

 

This looks like the GND vias in my design and it also shows a split GND plane. The VCC layer is as shown below -

 

image

 

So, there is a complete change in the split plane. How is this so ? Also, when I select loaded preset stack-up, in 4 layer it shows all layers as routing or signal layers. No planar layers. Can you help me out ?

 

Vinod

Parents
  • 0

    There is a plane layer type in the board stack. If you open the board stack manager use the Add Layer button and select Add Internal Plane. Alternatively you can use normal signal layers and draw a couple of polygons to represent the plane areas.

  • 0 in reply to e14softwareuk

    Thank you for the response. I tried the internal plane approach. But it shows the same thing. The split plane is appearing in the other layer and not the one I intend to place it on. Also, I dont want to go with the 2nd approach that you suggest for now. Have you encountered such a problem before ?

     

    In Altium, the preloaded stack up for 4 layer is Sig1,Lay1,Lay2,Sig2. It comes correctly so and not Sig1,SIg2,Sig3,Sig4. In the latter we are bending the system to make it a 4 layer. It will work, but if I have denser split planes and nested split planes it will be clumsy.

  • 0 in reply to vinodkaruvat

    I am confused how the split plane is appearing on the wrong layer. If you have adjusted your board stock to include plane layers then I'm not sure what can go wrong. The predefined layer stacks are just there as examples so it is easy to take the two layer board and add in two internal plane layers to get your 4 layer setup.

  • 0 in reply to e14softwareuk

    If you want to send me your PCB file to look at so I can better understand then feel free to zip and send the CSPcbDoc file to software@element14.com.

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