yes, that is exactly how I do it. Alignment is critical. some
things I've found that help:
I use full 8.5x11 sheets for each side - it makes it easier. Since
my paper costs me a penny a sheet I dont care if I waste a little.
It helps to have a tracing light box and a Scotch (I think) double
sided tape applicator. The paper I use is fairly translucent. I use
an old slide sorter for the light box. Its a pain to use but allows
pretty accurate alignment. A window on a sunny day does pretty well,
too. Temp tape the bottom paper to the glass and tweak the top until
you are there. Holding the two pieces of paper up to a lightbulb can
work but its much harder (for me anyway). I like to have a flat
surface to work on. a light box is pretty easy to build, by the way -
I plan on doing so, someday (hah, FLW).
The tape applicator allows one handed application of the double sided
tape so once you have your alignment, a quick swipe and you've got
your tape in place.
I try to tape as far away from the board image as possible to
minimize the effect of differential paper lengths from the tape to
the board.
vias make great registration points - if I can see light through the
hole, I know I'm pretty close. pay close attention vert and horiz
alignment. The good news is that you can be up 10 mils off and still
have a usable board.
I start ironing in the middle of the board as that is the best chance
of evening out the distortion caused by the differential paper
lengths.
Once I started using the ink jet paper, it took me about 4 tries to
finally get it. I bought a bunch of cheap, thin double sided boards
from goldmine and practiced. dont be afraid to wash off the toner
and start again. acetone strips toner almost instantly.
One final point. Its often the case that if you tweak your design
around a bit, you can get to a single sided board. this is always
more desirable than double. at least from a simplifying production
basis. I'll often change pin assignments on my MCUs to reduce
complexity. pin-swap is a good thing too.
Good luck.
Phil
--- In
Homebrew_PCBs@yahoogroups.com, "joshdewinter"
<joshdewinter@y...> wrote:
> > I'm very pleased with the results for both 1 and 2 sided boards.
>
> Hi. I'm trying to perfect my double-sided boards. How do you make
> your double sided boards? Do you line them up, tape them together,
> insert the board in between and iron them at the same time?
>
> -Josh