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My terrible experience with Multi-CB (a German PCB manufacturer)

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rfnm:
I don’t have time to spend ranting, as if I had a free second this should go on finding a suitable PCB vendor after this experience. However, I feel an obligation to share what happened to me and how I was treated, as a sort of customer beware.

To make a long story as short as possible, I’m developing a new product (see username), and decided to trust multi-cb for the manufacturing of the boards, given the good prices and an overall positive previous experience.

My choice however lead to the first product bringup being delayed by about three weeks over the promised delivery date, and after the boards came online, me discovering I had soldered unique components on a board with a power plane internally shorted to ground. Overall, I wasted about a month, all because I trusted my pcb manufacturer.

The longer version of the story begins this February, when I agree on a stackup with multi-cb to design my board around it.

Here is a timeline of events:

24/01/23: They approve the board stackup I will be using. I ask for more details (copper roughness, Er, etc.), to plug into a field solver so that no changes will be necessary during the pre-production phase, but they confirm that they will want to adjust the traces themselves, even after asking multiple times.
17/04/23: I send over two boards for quotation, one of which they saw previously. They only give me quotes for the older board and I assume they need a little more time to quote the second one.
18/04/23: I send an email asking for the status of the unquoted board. No answer (ignore count: 1x).
19/04/23: I send an email answering some engineering question, and I also enquire as per the status of the other board. I get ignored (2x).
24/04/23: I call them, enquiring about those delays. The person answering the call I believe is a support agent, as they have access to the emails. I give them my email address to try and find the RFQs that got ignored, but they seem to be amused by being unable to find anything among the many emails that we exchanged. Unable to get a compassionate human being on the phone, I send another email about the same topic and I finally get an answer! A quotation shortly follows and I place the order as soon as possible.

26/04/23: At this point everything has been delayed by a week, which is a lot of time in time-critical projects. I point this out, and I get an email saying "The order was received today at 07.55 and today is the first working day I will make sure of that", which reassures me a bit.

Expected shipping date is now 12/05/23. I'm disappointed by the delays caused by them ignoring my RFQs, but at this point I'm also ok with sharing some of the blame (I could have pushed them harder but was on a business trip with little time to spare). However, what follows is truly infuriating.

05/05/23: 10 days into production and 7 days from the promised shipment date, their engineers are asking questions. I'm surprised, but I figured that they might have already started manufacturing some layers as the questions are limited in scope. I answer the questions within a 15-minutes window.
08/05/23: I get even more questions, this time they are asking me to re-confirm the stackup as they had unilaterally increased the prepreg thickness of the middle layer without consulting me. I'm still believing that thanks to some tight integration between design and manufacturing, they can pull off the delivery date, but I decide to enquire about it.
09/05/23: They answer that they will start production today.

I'm absolutely destroyed by that answer. What do you mean, "START" production today? Your email from 26/04/23 says, and I quote "today is the first working day I will make sure of that".

How can you START production on the 9/05/23 if the email from two weeks prior said "today is the first working day"?

I ask them to call me to explain the situation. They ignore me (3x).

11/05/23: They send over an automated email notifying me of the delay, with a new shipping date estimated at 22/05/23. I reply by asking for a phone call, and they ignore me (4x).
22/05/23: This is their revised shipping date (+10 days from when originally scheduled). I get nothing. No shipping notification, no delay confirmation, and no phone call.

I ask yet again, for the third time, for them to call me to explain the situation. They keep ignoring my request (5x).

25/05/23: I finally receive the boards. I’m happy with the apparent quality of the work under a microscope, so I send an email thanking them for it.

At this point I’ve missed the originally scheduled assembly date with my contractor, so I had to reschedule and add even more delays.

12/06/23: Boards back from the assembly house, bringup time!
22/06/23: I discover the shorted power plane (I had focused on a different area of the board until then), so I send multi-cb an email expressing my disbelief. They ignore me (6x).
23/06/23: I spend the morning scrapping away at the pcb layer by layer until I find the shorted one, and discover that they had connected a ground via passing through the power plane to it. My design files don’t have this connection. I send them another email, which they also ignore (6x).
26/06/23: I point out that they have been ignoring my emails, and I get a first email back the following day, saying that they are investigating.
29/06/23: They offer to return the boards for a refund (the boards I had assembled following their 100% electrical test). I ask if they are joking.
30/6/23: They confirm that the error is on their side, and they issue me a credit note for 50% of the order value.

In conclusion, I wasted around a month on this, first with the manufacturer saying they will “send the boards for manufacturing today” (but actually taking two weeks to process files on a stackup we had agreed on), and then around a week to learn the obscure art of scrapping PCB layers to find shorts to give to the local CNC shop to drill out.

The cherry on top for of course being that even after all this multi-cb wasn’t bothered enough to offer me a full refund, which must be their policy.

They don’t care about you, and I believe I brought you proof.

ebastler:
Sorry to read about the manufacturing problems. What drove you to select Multi-CB in the first place? They seem to operate somewhere halfway between the high-volume/highly automated/limited flexibility places like JLCPCB, and the old-style "offline" PCB houses which cater to commercial customers. Do they have unique (claimed) strengths?

Regarding your product -- assuming it is https://rfnm.io/, that looks pretty cool. But since it also looks like it won't be cheap, I am a bit vexed by the fact that you don't tell your potential customers who's behind it. Is there a company (based where?) or is this a hobby project? Any prior projects in the field? Thanks!

cedivad:
Hey Ebastler, you are correct, there is a veil of anonymity behind the RFNM project (not by choice, it's not exactly being hidden who's behind it, but the only thing online at the moment is a landing page!).

RFNM Srl, based in Italy, will be the company selling preorders for the product next month, and I'm behind that company (Davide Cavion). I've just registered this account to say hello! I've worked on some other projects in the past, you can check out an interview with myself here [https://www.youtube.com/watch?v=KxqS-Uy76QI].

Undoubtedly, cost and Multi-CB being what was assumed as a trusted player based out of Europe were the driving factors. Unfortunately regardless of how inexpensive you want your product to be, saving $10 in PCB manufacturing cost or $5k in prototypes is simply not worth it. It's hard lesson, learned the hard way.

Multi-CB being a "highly automated facility" that doesn't care about their customers and will happily ignore them honestly wasn't a factor taken into consideration, because it came to surface completely unexpectedly.

Sure, they have some good prices on their standardized process, but we did pay I think 2-3x what their standard PCB with similar specs would have costed, the reasoning being that they are a high tech player in Europe, and they do have the manufacturing capabilities to produce quality PCBs... Which are pointless, if they place shorts on power planes and spend the rest of the time ignoring you.

sd:
I stopped ordering PCBs from Europe after several issues:
-shorted PCBs from Eurocircuits
-placed several orders for some advanced PCBs at a big fab in Italy. They gave me a lead time, let's say 3 weeks. In some cases I asked it they can manufacure them faster, and got 2 weeks lead time, of course I paid a few k extra for this service. The PCBs never arrived in 2 weeks, not even 3 weeks. When the final PCBs arrived I think I checked the UL code and the PCBs were actually manufactured by a different company in Asia. They just e-mailed them my gerbers, imported the PCBs, removed them the box, placed them in a box with their logo and shipped it to me via courier.

I can recommend pcbstartech.com (not from Europe). Their capabilities are really nice, they always send a 20 page report, even the cut PCB samples, potted in epoxy and sanded for via inspection and whatever. And if I pay extra and they say 1 week manufacturing time, the PCBs are actually shipped in 1 week.

Jlcpcb also has some quite good specs these days, but you can't make your own exotic stackup.

nctnico:
About shorted PCBs: make sure to select electrical testing otherwise you are on your own. AFAIK Eurocircuits uses some kind of AOI system with the same effect.

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