Congratulation on a good result!
Out of curiosity you might want to print the resolution target to see how
the printer behaves with angular lines. See:
http://www.vinland.com/USAF-1951.htmlBertho
From Leon Heller Sent: Sunday, February 12, 2012 09:39
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.jpgI 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
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