Don't order from JLCPCB with assembly if you live in america. Sketchy.

[max-bit]

Very long waiting time for order fulfillment. They took over 2 weeks to make the PCB, and the shipping was also very slow!

[SiliconWizard]

Well, I don't know when your ordered this board, so maybe not relevant, but just note that this is the "bad" time at the moment for ordering from China, due to their holiday, which lasts for quite a long time.
Although I've noticed that PCB assembly @JLCPCB has been relatively slow (compared to a few months ago) lately, even before the holiday. Don't know. Possibly they are overwhelmed with orders. Popularity.

[max-bit]

Let them get to work, not holidays and holidays...

[quince]

I know I'm responding to a year-old thread, but this truly explains why so many companies refuse to do business with individuals or in small quantities.

Receiving a review this bad, with this much reach, for a full PCB+assembly order where the buyer is barely coherent in their complaints --- and the only revenue you get (minus shipping) is $109? It's a wonder they don't simply make the minimum order size $1000.

[eTobey]

I just received my order today (just a PCB). This PCB is nearly flawless, and i was concerned, because i ordered it after they had holidays!
The only things i can complain about, is, that they plugged vias (were not tented), that i did not want to be plugged. Yes the delivery took quite long, but that is not really in their hands. But they offer express delivery!

I had some complains in the past (PCB and 3D printing), but i was always a happy customer afterwards!

[Selectech]

I've been getting 100's of blank PCBs. several designs,  from JLC, all with no issues. Most are 4 layer and go to a local assembler.

Last year started using their assembly services and after several hundred assemblies, 6+ different designs, all worked out really well. 100% yield after test. These are cards with > 700 parts per board: 0402, 0603, 0805, QFN20, QFP48, QFP100, QFP120, TSSOPs ...

[Smokey]

... The traces were 160 instead 200, but that could actually be a advantage here. ...

Are you saying they reduced a track on your board by 40 mill??!!!!   

[eTobey]

Are you saying they reduced a track on your board by 40 mill??!!!!

I am investigating this issue. Might be an KICAD issue.

[HwAoRrDk]

The only things i can complain about, is, that they plugged vias (were not tented), that i did not want to be plugged.

Was your board made with HASL? I have found smaller diameter vias (e.g. 0.3mm) tend to get filled with solder if they are left untented. It's just an unavoidable side-effect of the HASL process.

[SiliconWizard]

I don't recommend leaving vias not tented in general. Maybe one use case is if you want to use them as test points and don't have enough room for actual test points.
Note that even when tented, larger vias will usually be left at least partially open as the soldermask can't cover them entirely.
And yes, untented vias and HASL will yield solder inside vias. In which case, that still works as test points if that was the initial intent.

You can ask them for confirmation is this is plugged vias or just a byproduct of HASL. It's possible that they indeed plugged vias on this particular batch to optimize their orders at this period. They probably consider plugged vias an "upgrade" compared to non-tented, so if they did that, they probably didn't consider it worth asking if that was ok.

[Smokey]

I don't recommend leaving vias not tented in general. Maybe one use case is if you want to use them as test points and don't have enough room for actual test points.
Note that even when tented, larger vias will usually be left at least partially open as the soldermask can't cover them entirely.
And yes, untented vias and HASL will yield solder inside vias. In which case, that still works as test points if that was the initial intent.

You can ask them for confirmation is this is plugged vias or just a byproduct of HASL. It's possible that they indeed plugged vias on this particular batch to optimize their orders at this period. They probably consider plugged vias an "upgrade" compared to non-tented, so if they did that, they probably didn't consider it worth asking if that was ok.

The via covering option is on the quote page.  Plugged is the default option. 

[eTobey]

I went for gold.

You can ask them for confirmation is this is plugged vias or just a byproduct of HASL. It's possible that they indeed plugged vias on this particular batch to optimize their orders at this period. They probably consider plugged vias an "upgrade" compared to non-tented, so if they did that, they probably didn't consider it worth asking if that was ok.

Yes they really do, because you could not deselect this.

But maybe i did something wrong. Maybe i had to define it in a layer, what i wanted to be plugged. I could not understand what the support tried to explain here.

[SiliconWizard]

I don't recommend leaving vias not tented in general. Maybe one use case is if you want to use them as test points and don't have enough room for actual test points.
Note that even when tented, larger vias will usually be left at least partially open as the soldermask can't cover them entirely.
And yes, untented vias and HASL will yield solder inside vias. In which case, that still works as test points if that was the initial intent.

You can ask them for confirmation is this is plugged vias or just a byproduct of HASL. It's possible that they indeed plugged vias on this particular batch to optimize their orders at this period. They probably consider plugged vias an "upgrade" compared to non-tented, so if they did that, they probably didn't consider it worth asking if that was ok.

The via covering option is on the quote page.  Plugged is the default option.

eTobey just mentioned that he used gold (which I'm assuming means ENIG here), but didn't before, unless I missed it.
Turns out that JLCPCB makes plugged vias default when using ENIG finish, but obviously not for HASL finishes. So that was the key information to have.

They don't seem to even offer tented vias for the ENIG finish, so there you go. Untented is grayed out. But you can apparently select untented, and with ENIG, it appears to be the same price as plugged. So, I don't know what happened. Maybe some additional option eTobey chose made untented impossible, I didn't try all options possible. Or maybe, as I mentioned, they hadn't enough orders for ENIG with untented, so they just could not economically do it.

And some more testing seems to indicate that the option page (I selected 4 layers, so again didn't try all combinations) may be buggy as hell. After having selected ENIG as a finish and reverting back to HASL, it becomes impossible to select "tented". I don't know. 

[Smokey]

This has nothing to do with anything in this thread, but it's still sort of amazing.
I placed a JLCPCB order for ten 50x50mm 4 layer boards on March 2nd, and they showed up today... March 5th. 
I ordered parts right before I ordered the boards, and Digikey still hasn't even shipped them yet.