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Article #801

Re: Why don't they mark SMD caps?

#801
From: Archimedes' Lever
Date: Fri, 24 Jul 2009 04:38
30 lines
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On Fri, 24 Jul 2009 13:06:12 +1000, "David L. Jones" <altzone@gmail.com>
wrote:

>Archimedes' Lever wrote:
>> On Thu, 23 Jul 2009 10:58:49 -0400, "Michael A. Terrell"
>> <mike.terrell@earthlink.net> wrote:
>>
>>>   Most of what we used were marked with a two character code.  The
>>> cheaper suppliers were unmarked.
>>
>>  Wrong again.  Markings fell out of vogue as part size decreased to
>> the point where it was labor intensive to even examine the marking.
>
>Why do resistors of the same size still commonly have the markings then?
>It's not about the size, we are talking 1206/0805 and other large sizes 
>here.
>Markings on these size caps are not common (some would say rare), and it's 
>*always* been that way.
>The question is why?...
>
>Dave.

  It maybe has "always been that way" with el cheapo brands, but I used
to do pre-reflow inspection (post pick and place), and have loaded the
cassettes into the picker placer, and have loaded the reels into the
cassettes and have programmed the PCB into it... yada yada yada...

  I have seen a lot of caps that were marked, so you are either using
cheap parts and always have, or your "always has" only amounts to a year
or two, since they now seldom do it.
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From: Archimedes' Lever <OneBigLever@InfiniteSeries.Org>
Newsgroups: sci.electronics.design,aus.electronics
Subject: Re: Why don't they mark SMD caps?
Organization: Archimedes'Palimpsest
Reply-To: My Assistant:  Zhang Heng
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Date: Thu, 23 Jul 2009 21:38:25 -0700