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Article #773Re: Why don't they mark SMD caps?
From: Bob Larter
Date: Sat, 25 Jul 2009 14:43
Date: Sat, 25 Jul 2009 14:43
40 lines
2692 bytes
2692 bytes
Dennis wrote:
> "David L. Jones" <altzone@gmail.com> wrote in message
> news:Z_S9m.29971$ZN.18539@newsfe23.iad...
>> An interesting question was posted on another forum:
>> "can you get (ceramic) SMD caps (1206,0805 etc) with the values printed on
>> them?".
>>
>> My first response was that I've very rarely seen this (like maybe once),
>> and while it is possible (see
>> http://www.synrad.com/search_apps/application_briefs/117-2.htm), you
>> basically can't get labeled ones, they are almost always without markings.
>>
>> It got me to thinking, why is it so?
>> My guess would be that it's due to the surface finish (or lack thereof) on
>> ceramic capacitors, and/or the delicate nature of their multi-layer
>> construction means they could be more easily damaged or properties altered
>> by the process.
>> As opposed to most SMD resistors that have a coating on them which would
>> allow for easy and accurate printing using various technologies.
>>
>> Any know the real reason(s) why ceramic SMD caps don't have markings?
>>
>> Dave.
>> --
>> ================================================
>> Check out my Electronics Engineering Video Blog & Podcast:
>> http://www.alternatezone.com/eevblog/
>>
>>
>
> It done purely to give techs the shits when building proto's or fault
> finding. :)
LOL. Ain't that the truth.
--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
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X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news2.google.com!news1.google.com!news.glorb.com!news2.glorb.com!blackhelicopter.databasix.com!not-for-mail From: Bob Larter <bobbylarter@gmail.com> Newsgroups: sci.electronics.design,aus.electronics Subject: Re: Why don't they mark SMD caps? Date: Sun, 26 Jul 2009 00:43:09 +1000 Organization: DataBasix - Continuing to kick USENet ass. Lines: 40 Message-ID: <h4f5hj$l22$1@blackhelicopter.databasix.com> References: <Z_S9m.29971$ZN.18539@newsfe23.iad> <4a6802b7$0$9719$5a62ac22@per-qv1-newsreader-01.iinet.net.au> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blackhelicopter.databasix.com 1248532852 21570 blackhelicopter.databasix.com (25 Jul 2009 14:40:52 GMT) X-Complaints-To: abuse@databasix.com NNTP-Posting-Date: Sat, 25 Jul 2009 14:40:52 +0000 (UTC) User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.22) Gecko/20090605 Thunderbird/2.0.0.22 Mnenhy/0.7.6.666 In-Reply-To: <4a6802b7$0$9719$5a62ac22@per-qv1-newsreader-01.iinet.net.au>