Re: [kicad-users] Re: Changing solder mask dimension?
Hi, I think you are wrong. This changes the mask clearance around vias and pads. Traces are covered by the mask. It is not possible to set the mask clearance in the module editor since it is not a pad property, but a circuit one. I do not know if it is possible with other programs, with Kicad we only can set one mask clearance for the whole circuit. Pedro. If I understand correctly, this only changes the mask clearance around vias and traces. I need to change the clearance around the pads in the module editor. Doug --- In kicad-users@yahoogroups.com, bill Randall [EMAIL PROTECTED] wrote: Hi, I had the same problem - the PCB manufacturer said there was too much overlap of mask over pad. This can be set as follows in PCBNEW: Go to Dimensions (top tool bar) Go to Tracks and Vias Set Mask clearance as required (I used 0.004 and PCB manufacturer is happy with that) Bill UCT Pedro Martin [EMAIL PROTECTED] 11/11/2008 06:22 PM Hi, Dimensions-Tracks and vias - Mask clearance Regards, Pedro. Maybe I missed this in the documentation, but I can't figure out how to change the solder mask opening size. I am laying out a 4 bump chip scale package and the default mask opening is too large. How do I change this dimension? Regards, Doug Deeds Forthright Solutions 817 230 4483
Re: [kicad-users] Re: Changing solder mask dimension?
Hi Doug, Why edit every pin each time you use the IC? The only 2 parametres needed are clearance, i.e. minimum gap between tracks and so, and mask clearance for minimum solder gap. Since these 2 parametres depend on the manufacturer technology, it is reasonable to think they shoul be unique for the whole pcb. The only possible case for specific pad editing is the case that the pad metal area should be bigger than the solder paste area. And this is an unusual case. For BGAs I have used a round one side pad, no problem at all. In this case I set the mask clearance to 0.0991 mm or 0.0039 inch. Regards, Pedro. This seems to be a poor way to do this since any time I use this IC I will have to manually edit each pin. Luckily this particular one only has 4 pins. And since there is no way to visibly detect changes in PCBnew you have to check each pin in a Gerber viewer. Since you have both done this, what is your opinion on how a fix should be implemented? I think the module editor should implement this. I initially was thinking that the editor should just allow you to change the mask clearance. But I am wondering if also allowing another type of pad BGA would make better sense.
[kicad-users] Re: Changing solder mask dimension?
If I understand correctly, this only changes the mask clearance around vias and traces. I need to change the clearance around the pads in the module editor. Doug --- In kicad-users@yahoogroups.com, bill Randall [EMAIL PROTECTED] wrote: Hi, I had the same problem - the PCB manufacturer said there was too much overlap of mask over pad. This can be set as follows in PCBNEW: Go to Dimensions (top tool bar) Go to Tracks and Vias Set Mask clearance as required (I used 0.004 and PCB manufacturer is happy with that) Bill UCT Pedro Martin [EMAIL PROTECTED] 11/11/2008 06:22 PM Hi, Dimensions-Tracks and vias - Mask clearance Regards, Pedro. Maybe I missed this in the documentation, but I can't figure out how to change the solder mask opening size. I am laying out a 4 bump chip scale package and the default mask opening is too large. How do I change this dimension? Regards, Doug Deeds Forthright Solutions 817 230 4483
