i thought i start this as a "exposure" for people wanting to see what fabs can or cannot do. or even if you mill it yourself, maybe you could share some pics
i only have tried seeed fusion. and this is my latest receipt from an order on lunar new years week. due to their backlog, they processed it on 3rd march, and completed its delivery to me on 14th. backlog delay approx 14 days, production and delivery 11 days (including weekend days).
this PCB is the cheapie tier USD9.90 for 10pieces. 0.6mm FR4. no other additional addon options. 1968x1968 mils (5x5cm)
the result is rough and somewhat crude as was previous batch, so i can somewhat say, it is what it is, cheap prototyping.
the silkscreen for this is 6mil thick 32mil high. pretty much its limits. some parts you can already see its quirky
the vias are 19.7mil holes. the drilling is rough, can see the burrs. maybe the bit is worn. and the mask randomly fills some of the vias. (at some point i may proceed to test the current capacity of these vias, maybe they are not as good as nobody can "see" its thickness)
the paneling is rough, again maybe the bit is worn. or there is no post process to smoothen PCB edges
1 good thing for sure, so far there is no masking errors in all my batches (so far about 90 pieces total)
they do sometimes use odd leftover PCB to fulfill orders, especially where corners are nicked. and they seem to be able aim this at blank spaces !
as with all batches, all pads are scuffed, maybe there is a post washing process where there is some scouring involved.
(note for admin : tried to upload 850kb pic file, failed 2x
![Confused :-//](https://www.eevblog.com/forum/Smileys/default/confused0024.gif)
... this 1 worked, maybe there is 2 broken threads floating in the server, both thread submission failed)