开云体育

Paste stencil "window pane" GND pad issue

berwynhoyt #12415 Hi folks, I have components with a central large GND pad in the middle and standard pin pads around the edges. ?The paste stencil for these has one large GND pad sized opening for solder mask. ?Then it has several smaller (no copper layer) pads overlaid on that to create a solder paste stencil "window pane" grid (this is the ? of applying solder paste because if you use a single large paste pad, there is too much solder in the middle. This works find to generate a paste stencil grid for the large GND plane. ?However, Freerouter will no longer open the .dsn file. ?In order to get freerouter to open the .dsn file, I have to change the pads to be copper-layer pads instead of no-copper-layer pads. ?But if I do that then I get DRC errors "Pad near pad" for each of those pads (because they're superimposed on the solder mask pad. Is there a solution for this? Thanks, Berwyn
Wayne C. Gramlich All Messages By This Member #12435 Berwyn: I was hoping somebody would chime in with an answer to your question. Alas, it is not me. The only information I have found for KiCAD support of large thermal pads is in the Files folder of the kicad-users Yahoo group: There might be other "tricks", but I am unaware of them. I am hoping that one of the wonderful KiCAD developers is working on this problem. I suspect that the .mod/.brd file format needs some tweaking for better support of "thermal pads", but that is pure speculation on my part. If anybody else has some better suggestions, please let us know. Regards, -Wayne toggle quoted message Show quoted text --- In kicad-users@..., "berwynhoyt" <berwyn@...> wrote: Hi folks, I have components with a central large GND pad in the middle and standard pin pads around the edges. The paste stencil for these has one large GND pad sized opening for solder mask. Then it has several smaller (no copper layer) pads overlaid on that to create a solder paste stencil "window pane" grid (this is the recommended way <> of applying solder paste because if you use a single large paste pad, there is too much solder in the middle. This works find to generate a paste stencil grid for the large GND plane. However, Freerouter will no longer open the .dsn file. In order to get freerouter to open the .dsn file, I have to change the pads to be copper-layer pads instead of no-copper-layer pads. But if I do that then I get DRC errors "Pad near pad" for each of those pads (because they're superimposed on the solder mask pad. Is there a solution for this? Thanks,Berwyn

Previous Topic Next Topic