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'[Bulk] Re: [EE] Fast, Cheap, and Good PCB manufact'
2009\03\12@161107 by Isaac Marino Bavaresco

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Vitaliy escreveu:
{Quote hidden}

I always request electrical test for boards with 4 layers and up.

For boards up to two layers I agree that it is wasting money. I never
got a bad single or two layer board from the manufacturers.

Regards,

Isaac

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2009\03\12@164235 by Vitaliy

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Isaac Marino Bavaresco wrote:
> I always request electrical test for boards with 4 layers and up.

When we move beyond 2-layer PCBs, we will definitely start paying for
electrical tests.


>For boards up to two layers I agree that it is wasting money. I never
got a bad single or two layer board from the manufacturers.

We had our share of defective PCBs, however like I said the effort required
to troubleshoot and fix the problems was minimal.

Vitaliy

2009\03\12@170932 by olin piclist

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Isaac Marino Bavaresco wrote:
> I always request electrical test for boards with 4 layers and up.
>
> For boards up to two layers I agree that it is wasting money. I never
> got a bad single or two layer board from the manufacturers.

Then you've been lucky.  I've had bad vias that looked good visually,
hairline breaks in traces, and once even a errant finger of copper shorting
two unrelated traces.  Life is too short to waste time on that stuff.  $20
is worth not having the aggrevation, let alone the cost of diagnosing the
problem, fixing the board, and possibly replacing components that got
damaged in the process.


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.

2009\03\12@173415 by Bob Ammerman

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----- Original Message -----
From: "Olin Lathrop" <spam_OUTolin_piclistTakeThisOuTspamembedinc.com>
To: "Microcontroller discussion list - Public." <.....piclistKILLspamspam@spam@mit.edu>
Sent: Thursday, March 12, 2009 5:10 PM
Subject: Re: [Bulk] Re: [EE] Fast, Cheap, and Good PCB manufacturer


{Quote hidden}

I would say he is very lucky. I've only ordered boards a few times myself
and had a shorted trace (a big blob of extra copper) on a relatively simple
2 layer board. I hadn't specified testing, but luckily caught it with a
careful visual inspection before loading the board.

-- Bob Ammerman
RAm Systems

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