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Well, you may not have to worry, but if you have large unpoured areas on a design with a professional PCB manufacturer (of the traditional, high-touch kind), th
by aylons 2y ago
Well, you may not have to worry, but if you have large unpoured areas on a design with a professional PCB manufacturer (of the traditional, high-touch kind), they will ask if you want to pour some copper there. Reason being that it makes the process faster, more consistent and reduce possible side-etching on lanes. It may not a make a difference in most cases, but you may just save some time and effort by doing this.
- iancmceachern 2y agoThe reason is that the copper is already there, it gets etched away. So it actually costs more to not have copper than to have it.
- shermantanktop 2y agoAt industrial scale, surely they recover that copper from the etching fluid?
- andrewflnr 2y agoEven if they do, the recovery itself would surely have costs. It can't be easy.
- iancmceachern 2y agoIndeed, the enchant is very nasty stuff, it's not easy or clean to do so.
- aylons 2y agoYes, but this costs pales in the cost of redoing in case of problems with side-etching and the overall tightened manufacturing constraints. And yes, they get to recover the copper, at the very least to make treatment easier for discarding (copper is a very bad pollutant). But not only there's a cost, this is dealt with by waste treatment companies that will at most use the copper value to recoup some of the cost of the treatment.