Homebrew_PCBs

I was reading some research papers on inkjet printing organic devices.
Like alot of people here, they have problems with the ink spreading
before drying is complete. One thing that is done to minimize
spreading is to heat the substrate(board) to make the ink dry faster.
An example paper is
http://www.eecs.berkeley.edu/~viveks/Papers/H8_3MRS03.pdf, but
the technique is mentioned in serveral papers.
There are some issues with the technique such as causing excessive
evaporation at the printhead, but it seems there are ways to work
around it.
I do not have anything setup to do this kind of experimenation myself,
but it may give someone else some ideas.

--- In Homebrew_PCBs@yahoogroups.com, "javaguy11111"
<javaguy11111@...> wrote:

>
> I was reading some research papers on inkjet printing organic devices.
> Like alot of people here, they have problems with the ink spreading
> before drying is complete. One thing that is done to minimize
> spreading is to heat the substrate(board) to make the ink dry faster.
> An example paper is
> http://www.eecs.berkeley.edu/~viveks/Papers/H8_3MRS03.pdf, but
> the technique is mentioned in serveral papers.
> There are some issues with the technique such as causing excessive
> evaporation at the printhead, but it seems there are ways to work
> around it.
> I do not have anything setup to do this kind of experimenation myself,
> but it may give someone else some ideas.
>

HP 1200C inkjet printers (big old ones with i860
CPUs and megs of memory) had 2 heaters in them.

One big resistance wire coil just below the
print head path and a big flat warm ribbon that
the paper past over before exit.

Also some of the big inkjet plotters have a fan
that blows hot air at the ink just behind the
print heads.

sounds like a lot of modification to an R220
though.