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Article #791Re: Why don't they mark SMD caps?
From: Wayne.
Date: Fri, 24 Jul 2009 01:38
Date: Fri, 24 Jul 2009 01:38
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2230 bytes
David L. Jones wrote: > 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. What I hate about these components, I am looking at 3 0805 bits, one is a resistor, the second is a cap, and I have no idea what the third is but they are the same colour.
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X-Google-Thread: a5a6238865,26f718ada9b9cff2 X-Google-Attributes: gida5a6238865,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news2.google.com!news3.google.com!goblin3!goblin.stu.neva.ru!exi-transit.telstra.net!exi-in1.telstra.net!news.telstra.net!newsfeed.iinet.net.au!newsfeed.iinet.net.au!per-qv1-newsstorage1.iinet.net.au!per-qv1-newsstorage1.iinet.net.au!per-qv1-newsreader-01.iinet.net.au!not-for-mail Date: Fri, 24 Jul 2009 11:38:15 +1000 From: "Wayne." <abuse@hotmail.com> User-Agent: Thunderbird 2.0.0.22 (Windows/20090605) MIME-Version: 1.0 Newsgroups: sci.electronics.design,aus.electronics Subject: Re: Why don't they mark SMD caps? References: <Z_S9m.29971$ZN.18539@newsfe23.iad> In-Reply-To: <Z_S9m.29971$ZN.18539@newsfe23.iad> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Lines: 25 Message-ID: <4a69108b$0$9760$5a62ac22@per-qv1-newsreader-01.iinet.net.au> NNTP-Posting-Host: 203.214.89.216 X-Trace: 1248399499 per-qv1-newsreader-01.iinet.net.au 9760 203.214.89.216