I use Eurocircuits. They scan PCBs with a special flatbed scanner to look for shorts and opens.
-- Failure does not prove something is impossible, failure simply indicates you are not using the right tools... nico@nctdevpuntnl (punt=.) --------------------------------------------------------------
I missed that very important point. More than once their front end check has picked up silly mistakes I had made. That alone is worth untold money.... OK so I get a delay of a couple of days. Life isn't that short.
I've take some boards on Onlypcb,china manufacture,not bad,may be you could try it.
bly
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YHow did they reconcile the electrical test vs. the shorts?
-- We've mostly used Advanced Circuits for multilayer boards, generally without (paying for) the electrical testing. Mostly we try to avoid pushing the design rules too closely. This hasn't always worked - we've had occasional opens, and most recently a serious inner layer short on one board (not fixable). On one occasion AdvPCB forgot to put the insulating layer between copper layers 2&3 - they remade the boards at their cost in that case.
bly
one
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YI've take some 4Layer boards from
You mean to say that you have found somewhere that doesn't handle Gerbers?? Must be somthing very special
--- Posted via news://freenews.netfront.net/ - Complaints to snipped-for-privacy@netfront.net
Well, we just moved to another supplier! One error of that sort and we just blacklisted them forever.
Well, once I have several hundred $ of parts on a big board, I sure don't want to scrap it. I had to put several amps into the power/ground plane and then observe millivolt differences to try to localize the short. When I got real close, I then shined a bright light on the back of the board and looked through the window around the PTH's until I found one that looked suspicious. I then carved into the board with an X-acto knife until I cut the short. Probably cost me 4 hours to fix one board.
Anyway, most vendors will just credit you the $15 or whatever you paid for the per-board part of the order. BIG DEAL! I want their heads mounted on a pole as a warning to other vendors. I can tell by tiny prick marks in the pads when a board has actually been electrically tested on the flying probe tester. Every board ought to have those marks, or I am being cheated by the fabricator. I think the logic is they test the first 5 boards of the lot, and if they pass, they just mark the whole rest of the lot OK. Anybody who does this ought to be fired on the spot. So, now that I have found a fabricator who really DOES make sure there are no screwups or shortcuts, I am very reluctant to switch.
Gee, I sure HOPE SO! How the heck did that get through electrical test? Did they use the first board as the "golden board" and then check all others against the first? Brilliant plan - unless there is a systematic error in all the boards! Well, I had some similar experiences with Adv. Circuits years ago, where they opened up the power plane clearances on a batch of boards without my authorization. I had already checked the power and ground plane continuity at the specified clearance, so when the opened it up it cut some of the planes. I never knew how these got past electrical test, but they had to remake that batch. For this reason, the tester should be programmed from the board layout, NOT from a "golden board" unless you KNOW that it is truly correct.
Jon
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The 'error' that caught me off guard was when the PCB Fab house found a large blank area to leave metal letters describing their firm and the part number and the llot run info - RIGHT IN THE MIDDLE OF A HIGH VOLTAGE GAP! All without asking. In defense, the board WAS small and there was no other location, but still.
? 2012?1?12???? UTC
+8??11:54:55?Klaus Jensen??? ?maybe
Really? 100 designs?
? 2012?1?13???? UTC
+8??4:05:48?J> y e g? 2012?1?13???? UTC
+8??4:05:48?J> y e gReally? 100 designs?
Yes, indeed. A few are revisions of older versions, but there are a bunch of custom gizmos I have made for people, as well as my standard products. I'm maintaining production of about 20 products right now.
Jon
? 2012?1?12???? UTC
+8??11:54:55?Klaus Jensen??? ?Hello Klaus,
Nice to meet you This is Lisa on the way to say hi I was wondering whether you still seeking pcb or pcba assembly?
Call me, let's talk details. Best Regards Lisa Liu Mobile: +86-13729121746 (whatsapp&wechat) Office: +86-755-86229518-823 Skype: wonderful-pcb02 Email: snipped-for-privacy@wonderfulpcb.com
Look into JLCPCB. (China) We've been using them a lot lately for our general purpose boards.
I hadn't heard of pcbcart before so of course I had to price-shop them: :) QTY-20, 100mm x 100mm, double-side, 1oz copper, etc.. "apples-to-apples" From pcbcart: $85.00 (for crappy prototype boards, 5-days) From pcbcart: $122.40 (for production boards, 8-days)
From JLCPCB: $21.39 (for PRODUCTION boards, not prototype), 8-days (Florid a). And, $14.20 to ship it. So, roughly half the price of prototype boards but you're getting real boards instead.
We've also used Seeed Studio (and other offshore variants), and at the time thought that was a good deal. Then we shopped JLCPCB. Wow! No complaints on the boards, and we've been averaging 5 to 8-day turns from order to in-hand, delivery to Florida.
We still use domestic suppliers for anything high-frequency or impedance co ntrolled, including complex multi-layer with specific stack builds. Otherw ise, I think it's going to be really hard to beat JLCPCB if you can wait a week to get real production boards.
Since we're exhuming an ancient thread, I'll put in a plug for PCBway. They're very inexpensive, and at least as easy to work with as any onshore vendor I've dealt with.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
We use these for prototypes...
Never had any problems.
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pcbway.com is what I like.
I didn't even notice that. :( Oh well, the update nearly 7-years later might prove interesting.
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