Homebrew PCBs

Iulian,

You have obviously got this project planned to a higher level than I 
had anticipated. In theory, I can see no reason why a home brew piezo 
DOD can't be achieved. Re glass pipette drawing, we tried this in the 
early days of ink delivery using a CO2 laser to supply a burst of 
thermal to the ink thru the glass which worked fine. The problem was 
the end of the drawn pipette was always too ragged without a lot of 
cost for consistency in drop formation.

I can't see why a single DOD assembly couldn't be used to lay a 
resist layer direct to pcb. Would just take some time for a largish 
board.

I also use turbocnc so a front end to that would be great.

Looking forward to your developments.

roger


--- In Homebrew_PCBs@yahoogroups.com, "Iulian Demetrescu" 
<iulian_dbc@y...> wrote:
> 
> 
> well actually there are several ways to do the orifice
> 
>  one is drilling it with some technology like drill bits of 0.10 mm 
or
> go to a laser marking company who will drill the hole for you
>  another one is the ceramic/crystal approach where there are also
> several companies offering specialized orfices in different sizes
> going from 60 micrometers to 5 mm (this is the mostly used by
> professional devices)
>  the third one is to use metalic tubing from medical or other
> applications.
> 
> 
> iulian