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Article #791

Re: Why don't they mark SMD caps?

#791
From: Wayne.
Date: Fri, 24 Jul 2009 01:38
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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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Date: Fri, 24 Jul 2009 11:38:15 +1000
From: "Wayne." <abuse@hotmail.com>
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