Homebrew PCBs

On Thu, 23 Feb 2006 11:20:33 +0100, Leon Heller  
<leon.heller@...> wrote:

> I think that the really fine-line stuff is made by copper deposition, not
>
> etching.
>
>
> Leon


Maybe.

Much finer etching wouldn't be a huge problem, it's done with ICs (they  
can steer the etching direction), but it's just not possible with homebrew  
etchers most of us use, AND it is also not needed at all. I wouldn't have  
a use for anything under 6mil anyway.
But i say the main limit is underetching, which process or printer or  
collimation or... is all nice and well, but even if you can get down a  
perfect 1mil track of resist you can't etch it, so all the rest doesn't  
really matter.

ST