Homebrew PCBs

Derward Myrick wrote:
> 
>   I have been busy and just got around to doing it.
>   Go to this site and see it.  Note that there are 4
>   boards shown.  I did more but if I show more boards
>   it is hard to se the traces.  Also the one labeld five mil
>   is the three mill and the one labeled 3 mill is the 5 mill.
>   http://www.denhamsprings.com/pcb_1mil.jpg
> 
>   Derward Myrick  KD5WWI

When PCB manufacture specifies a track/space width capability of X, then 
it should mean one can reliably create a PCB with any arbitrary pattern 
over a very large area, having trace width of X and space of X.

Come back with photos of a 100mm x 100mm PCB with 2000 parallel lines 
(i.e 1mil width/space).

Maybe we should start the 2009 Homebrew_PCB annual competition, on who 
can make finest lines. Here is a a good test pattern. A dual spiral 
covering an area 100 x 100mm.

To qualify:
continuity of trace A  and
continuity of trace B  and
insulation between A and B


  A ---------.
  B -------. |
    .----. | |
    | B  | | |
    | | A' | |
    | '----' |
    '--------'