Homebrew PCBs

I created a simple test pattern yesterday, so that I could see what my 
PCB process was capable of. Here is a (not very good) photo of the results:

http://www.leonheller.com/images/Test.jpg

I couldn't find the reversing ring for my 50 mm lens, and had to use the 
rather awkward macro setting on one of my zoom lenses.

The 6/6 and 4/4 mil tracks are actually a lot better than they appear, 
with no breaks and no shorts.

The transparency was printed at 1200 dpi on Jetstar Premium film on my 
HP 5940 inkjet printer. The PCB material was pre-sensitised (positive) 
Mega Electronics FPC 16 laminate. Warm FeCl3 was used for etching.

I use 10/10 and 12/12 mil for most of my boards, and never go below 8/8. 
It looks as though 6/6 should be possible, but 4/4 might be pushing it. :)

Leon
-- 
Leon Heller
G1HSM