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Article #834Re: Why don't they mark SMD caps?
From: Dennis
Date: Thu, 23 Jul 2009 06:27
Date: Thu, 23 Jul 2009 06:27
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"David L. Jones" <altzone@gmail.com> wrote in message news:Z_S9m.29971$ZN.18539@newsfe23.iad... > An interesting question was posted on another forum: > "can you get (ceramic) SMD caps (1206,0805 etc) with the values printed on > them?". > > My first response was that I've very rarely seen this (like maybe once), > and while it is possible (see > http://www.synrad.com/search_apps/application_briefs/117-2.htm), you > basically can't get labeled ones, they are almost always without markings. > > It got me to thinking, why is it so? > My guess would be that it's due to the surface finish (or lack thereof) on > ceramic capacitors, and/or the delicate nature of their multi-layer > construction means they could be more easily damaged or properties altered > by the process. > As opposed to most SMD resistors that have a coating on them which would > allow for easy and accurate printing using various technologies. > > Any know the real reason(s) why ceramic SMD caps don't have markings? > > Dave. > -- > ================================================ > Check out my Electronics Engineering Video Blog & Podcast: > http://www.alternatezone.com/eevblog/ > > It done purely to give techs the shits when building proto's or fault finding. :)
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X-Google-Thread: a5a6238865,26f718ada9b9cff2 X-Google-Attributes: gida5a6238865,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news2.google.com!news2.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed.iinet.net.au!newsfeed.iinet.net.au!per-qv1-newsstorage1.iinet.net.au!per-qv1-newsstorage1.iinet.net.au!per-qv1-newsreader-01.iinet.net.au!not-for-mail From: "Dennis" <dennis@nowhere.com> Newsgroups: sci.electronics.design,aus.electronics References: <Z_S9m.29971$ZN.18539@newsfe23.iad> Subject: Re: Why don't they mark SMD caps? Date: Thu, 23 Jul 2009 14:27:01 +0800 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-RFC2646: Format=Flowed; Response X-Antivirus: avast! (VPS 090722-0, 22/07/2009), Outbound message X-Antivirus-Status: Clean Lines: 34 Message-ID: <4a6802b7$0$9719$5a62ac22@per-qv1-newsreader-01.iinet.net.au> NNTP-Posting-Host: 203.59.146.189 X-Trace: 1248330423 per-qv1-newsreader-01.iinet.net.au 9719 203.59.146.189