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Subject: Re: [Homebrew_PCBs] Re: Photolithography - resolution

From: "Stefan Trethan" <stefan_trethan@...>
Date: 2006-02-23

On Thu, 23 Feb 2006 18:22:52 +0100, Radra <infositeus@...> wrote:

> Lastly, my goal is not to actually fabricate 1 mil lines as I don't
>
> need them. Instead my goal is to learn what can be reasonably
>
> accomplished "at home" and apply that knowledge to fabricate the best
>
> looking PCBs possible. So, setting aside etching considerations for
>
> the moment, my original question still stands, does anyone have
>
> suggestions regarding how I can improve the processes employed prior
>
> to etching?
>
>
> Lyman


One dot of the average 1200DPI printer is about 1 mil, so it is not
surprising it doesn't form a good line one dot wide.
You already know what you can reasonably do - around 5 mil, and that is
about the same TT or potoprocess.

You could have your artwork professionally printed, but the restrictions
due to etching won't allow you to make a much better PCB anyway, so it is
probably not worth the cost.
You might also try one of the high resolution inkjets, maybe they make
better lines.

ST