- Sun Apr 01, 2012 5:39 pm
#142214
Hi all, thanks to the SFE Eagle tutorials I'm designing my first "professional" PCB, going pretty well but I'm running into some issues with a fine-pitch QFN accelerometer (MMA8453Q)
The pads are 0.3mm wide, with 0.5mm spacing between centres; ie. there's only a 0.2mm gap between the pads. Problem is, the soldermask spacing on the pads is such that it overlaps, resulting in no soldermask between the pads. I know what I want to do, but all my searching hasn't found a way of changing this setting, or whether it has to be a "global" setting as opposed to being able to change soldermask tolerances for one particular component?
Can I change a setting so that this Part is fixed retrospecively, or do I have to re-make my library? And if so, are all components going to be affected?
Any help would be greatly appreciated
The pads are 0.3mm wide, with 0.5mm spacing between centres; ie. there's only a 0.2mm gap between the pads. Problem is, the soldermask spacing on the pads is such that it overlaps, resulting in no soldermask between the pads. I know what I want to do, but all my searching hasn't found a way of changing this setting, or whether it has to be a "global" setting as opposed to being able to change soldermask tolerances for one particular component?
Can I change a setting so that this Part is fixed retrospecively, or do I have to re-make my library? And if so, are all components going to be affected?
Any help would be greatly appreciated