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> It sounds like what they're saying is that the solder pads are too small for some of the components The converse is also possible. Instead of being a design
by jeffbee 3y ago
> It sounds like what they're saying is that the solder pads are too small for some of the components
The converse is also possible. Instead of being a design flaw with the pads too small for the component, it could be that a larger component was substituted during manufacturing. Even terrible freeware EDA packages have design rules that will flag improper solder pad layouts, so it seems like what might have happened is the physical part does not resemble its model.
- exmadscientist 3y ago> Even terrible freeware EDA packages have design rules that will flag improper solder pad layouts No, they don't. EDA software doesn't really know what size the terminations are. It knows how big the pad itself is, and is very good at keeping those out of trouble, but it doesn't know what size the solderable area is. You might tell it, or give it a 3D model, but make a mistake there and you're right back here. As well, there are so many different kinds of terminations (pop quiz: what kind are these?) that even if it does know what size they are, it doesn't necessarily know what size or shape the pad should be. Also the CM will totally edit this stuff and not tell you. Which they're not supposed to do, and are probably better at if you're a huge customer, but they still do it. EDA sure doesn't know about that.
- deleted 3y ago[deleted]