Re: gEDA-user: How to fit REFDES on PCB with Hierarchy

[Steven Michalske <smichalske@xxxxxxxxx>]

Silly american here, but I cant tell if that is a 2 euro coin.... or  
not...

would you take a picture with a US quarter :-P  or tell me the  
diameter of the coin you used.

Hardkrash

On Mar 9, 2009, at 2:25 PM, Gabriel Paubert wrote:

> On Mon, Mar 09, 2009 at 08:09:45AM -0400, John Luciani wrote:
>> On Mon, Mar 9, 2009 at 7:39 AM, gene <carzrgr8@xxxxxxxxxxxxx> wrote:
>>
>>> How small can the font be made before it becomes unreadable?
>>
>> How thin a line can your PCB vendor draw? IIRC the specs at
>> PCB Express and Advanced Circuits are line widths of 10mils width
>> and spacing of 10mils. I believe the default character height in
>> PCB is around 50mils. I would be surprised if you could go
>> much smaller than 40mils (with 10/10 rules).
>
> The default in PCB is 45mil, whatever it means. In 2005 I did
> a small board to replace a completely obsolete chip (SP93804)
> in a critical system here. To fit all the text I reduced the
> size of refdes to 27mil in PCB, and they were drawn with 6mil
> lines IIRC. The attached picture gives you an idea of how it
> looks (it's the prototype which I hand assembled and it shows,
> but the 4 layer PCB was obviously subcontracted), not all
> characters are really readable.
>
> 	Gabriel
> <Sampler.JPG>
>
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