| I noticed that some of our pcb's component legend/designation are unreadable as they are placed under smt pads. Is this correct and according to standard? Although we don't have any problems with them as of now, I would like to know the effects on the process of this type of PCB Design so i could feedback to our Design Engineer. The pcb size is too small and too dense that there's no more space for the component legend. | Is it better to eliminate the legend if this is the case ? | thanks and regards, | dreamsniper
What Earl says is right, but I'm not reading you right. Surely you mean under the SM device? It is physically impossible to have the legend UNDER the pads with normal manufacturing practice - and damned difficult with VERY abnormal. As Earl says, if you have legends on the pads, you are in BIG trouble with soldering.
I'll add one rider to Earl's remarks: if the legend is hidden by the components, then it may still be useful during assembly preparation and when replacing faulty components, although there sure ain't much space under most passive devices, any more than legible values/colour codes on them are a thing of the past!
Brian | |
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