Have you contacted them and ask if they can do what you wanted at the price quoted. Could have just been a new guy made a mistake. They still have your order, they should send it free if they want your business. Mikek
It's not worth getting and stuffing another board from them. It has around $400 of parts on it, and a lot of assembly and engineering time.
We're cutting the trace widths down, to get closer to 50 ohms, but losses will go up.
I think we learned enough from the proto board to go for the real product, which would be fabbed by Cirexx or Gorilla.
The Chinese houses are cheap and fast, but quality is bad. I wouldn't mind finding a quick-turn proto house that charges more but actually reads fab drawings.
We had two other problems on this proto. The Coilcraft conical inductor, and the Hittite distributed amplifier, both have their lids attached with low-temp adhesive, maybe not washable with water or solvent. Both lost their lids but still work.
John Larkin Highland Technology, Inc
picosecond timing precision measurement
I can only find 3 copper layers there? I have had good luck with E- Teknet, but they sure don't do $2 boards, unless you order hundreds. I do 2, 4 and 6-layer boards with them, and have had great results on several hundred orders over more than 10 years.
You get what you pay for. The Chinese make most of the electronics we all use. Clearly they are capable of making quality electronic goods. You just need to select a quality vendor rather than the cheapest you can find.
- Get 1,000 miles of free Supercharging
I have done a lot of jobs by PCBway, and not the slightest complaint. They even spotted that I had solder mask on part of the pads for these ultra-tiny nekkid GaN transistors with solder balls on the silicon carrier, and when I OKed it, they processed it flawlessly on the same day.
The purchasing lady is not qualified for ordering pcbs with nonstandard layer structure. If she was, she could do GHz layout. What layer stack would you choose for a FPGA with 1000 Balls that has lots of JESD-204B 100 Ohm differential inputs? Probably not one where a 50 Ohm line is 120 mils wide.