Homebrew PCBs

Hello,

I just joined this group because I am getting back into 
electronics.  I was using my Google Fu to search the web on how a 
hobbist can do smt boards at home.  While searching, I came 
across  some companies that showed small cnc machines like the router 
type that had a small needle in place of the router.  The machine 
deposited various liquids on the boards like solder paster and 
silkscreen paste and epoxy encapsulation resin.

My question is has anyone tried this method with photoreactive 
resin?  They use it to make stamps for scrapbook images amoungst 
others.  Here is a link: http://www.granthams.com
He sells kits.  Their are other sites on the net where you can 
purchase this resin.

I have not built my cnc machine yet, I do have the electronics and 
motors from HobbyCNC built.  I am in between jobs so held off to make 
the money last.  I was thinking about putting this stuff in a syringe 
with a small needle, where the point had been machined flat, and 
using a cnc to deposit a small thin layer on the board.  Then all you 
should have to do is stick it under light.  Etch and then use a 
plastic brillo pad to remove the rubber.

Brian G.

I don't know this stuff, but it seems it has very low (no) adhesion to the base
material and, therefore, will not be useful as a resist.
if you are 'drawing' the board, why use this stuff instead of a simple ink or
paint as resist? the CNC would work as a flatbed plotter...


--- Brian Gracia <bgracia1@...> wrote:

> Hello,
> 
> I just joined this group because I am getting back into 
> electronics.  I was using my Google Fu to search the web on how a 
> hobbist can do smt boards at home.  While searching, I came 
> across  some companies that showed small cnc machines like the router 
> type that had a small needle in place of the router.  The machine 
> deposited various liquids on the boards like solder paster and 
> silkscreen paste and epoxy encapsulation resin.
> 
> My question is has anyone tried this method with photoreactive 
> resin?  They use it to make stamps for scrapbook images amoungst 
> others.  Here is a link: http://www.granthams.com
> He sells kits.  Their are other sites on the net where you can 
> purchase this resin.
> 
> I have not built my cnc machine yet, I do have the electronics and 
> motors from HobbyCNC built.  I am in between jobs so held off to make 
> the money last.  I was thinking about putting this stuff in a syringe 
> with a small needle, where the point had been machined flat, and 
> using a cnc to deposit a small thin layer on the board.  Then all you 
> should have to do is stick it under light.  Etch and then use a 
> plastic brillo pad to remove the rubber.
> 
> Brian G. 


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