How to create a PowerPad package with the holes includes

Fernando Silva wrote:

>This is a picture I like, with the 8 pin regulator REG+ package with the holes

>for thermal dissipation. The other side is a ground plane.

>There is no space without copper around the holes, so the dissipation is good.

>I can not do this and I tried a lot. Can you help me?

assuming you are still on <= 5.x? In that case it's not possible to do

that in the library.

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Lorenz

Lorenz wrote:

Fernando Silva wrote:

>> This is a picture I like, with the 8 pin regulator REG+ package with

>> the holes for thermal dissipation. The other side is a ground plane.

>> There is no space without copper around the holes, so the

>> dissipation is good.

>>

>> I can not do this and I tried a lot. Can you help me?

 

assuming you are still on <= 5.x? In that case it's not possible to do

that in the library.

--

 

Lorenz

Fair comment for v5  You cannot achieve that  final look by just creating

the package in the library.

The 5 air holes could be created in the board  editor using vias (named GND

or whatever the ground on the other side of your board is named.)

In the library, in a user defined layer, place some markers to act as guides

for placing  the vias once your package is positioned on the board. Note the

holes/vias  will not move with the package, which is a shortcoming of the

technique but easy enough to manage.

HTH

Warren

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Thank you for the answers.

I am using Eagle 6.1.

I used vias but I would like to have a package...

One test I did was quite good but I got a DRC message like "Layer abuse". I don't remember what I was doing.

I just tried to understand how Eagle works with a little test:

In the package I created a circle in layer 44 Drills. I can see it on the board editor. I confirmed the CAM use layers 44 and 45 for generating the .TXT file (device EXCELLON). But the resulting TXT file has no hole (acording GERBV). I need an hole with metalic walls (like vias and pads).

Can someone explain me how the layers work inside the package and how can I simulate holes, vias an pads drawing figures and choosing layers?

Thank you