Homebrew PCBs

> Adam Seychell wrote:
>
> I'm wondering what other people are doing
> out there for PCB that use SMD.
> <SNIP>
> I use photomasks from a inkjet printer.
> <SNIP>
> I can just get away with 0.008"(0.20mm)
> lines/spacings. 18um foil instead 36um
> makes etching fine traces a lot better.

I do pretty much the same as you do
except I use a large colour laser printer
instead of the inkjet.

Routinely get 8/8 thou across a large
board (150x300mm).  Will do 6/6 but will
try limit PCB size to 50x75mm so I can
fit 4 boards on small blank to make sure
I get one of the 4 that does not look too
thin.  That is mainly due to uneven etch
I think.

We don't all have spray etchers set up
in the back yard yet :D

I do find the cupperic chloride is not as
good for fine resolution as the old
ferric chloride used to be.  That might
be my haphazzard monitoring of the acid/
oxygen/density though.