Homebrew PCBs

Stefan Trethan wrote:
> Yes i know, you already wrote at some point it's only reliable for short tracks.
> But even that i doubt, since the mechanics of etching shouldn't allow
> a track narrower than it's height without lots of trouble.
> I think you just end up with slightly wider tracks than you think.
>
> Not that it matters, you can still use them to run through IC pads. I
> just would have been curious if there was a way to make seriously
> narrow traces.
>
> ST
>   
If you start out with VERY thin copper (say 1/10 the thickness of 1 oz 
copper) ... lay down a 1.5 mil resist and etch it ... drill holes ... 
activate holes ... then plate the copper up to the thickness of 1 oz 
copper ... would this result in narrow traces? ...  or is the limit in 
the photo/printer part of the process? ... some how the professional 
houses get very narrow traces and the edges look very good under 
magnification!
Jim
> On Sun, Mar 8, 2009 at 1:36 AM, Derward Myrick <wdmyrick@...> wrote:
>
>   
>> Adam this email was in reply to this message below.
>>
>> (NOTE,  All I said was I would run under
>> smd parts to save using a jumper.  This
>> was to Phil and I do it all the time.  I do
>> not claim to make whole boards using
>> 1 Mil traces.  As a mater of fact I always
>> use largest traces I can.  As the packages
>> get smaller you reach a point that you can't
>> go between them.)
>>
>>     
>
>
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