Homebrew PCBs

Stefan,

That patent IMO is pure BS... It's scary what the patent examiners 
allow to be patented these days. I'd bet dollars to doughnuts that 
this wouldn't hold up in court. AND wouldn't work in anyones shop. I 
thought patents required "reduction to practice" (which is a fancy 
way  of saying thay have to really work!)  It is quite obvious that 
the method described doesn't really work, and this is a 
shotgun/scattershot attempt to pre-empt anby subsequent similar 
method which DOES work... (I'd like to hear from Ed who received the 
patent...) 

The ONE interesting item (IMO) is the idea that using a dc voltage of 
5-300v (applied to the board copper) will allow for direct printing 
to the copper on the board. Maybe that part is worth checking out?

Anyway, to answer your question: I used "Avecia" and others in the 
INK business as patent search terms to try and find useful info. 
There WERE some useful patents going that route, but I didn't save 
them once I realised that registration with a laser printer (for 2 
sided boards) was not really likely... 

Ballendo

P.S. That patent you linked is worth reading just for the BS of it 
all<G> (skip the first few claims pages!) 


--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan 
<stefan_trethan@g...> wrote:
> On Sun, 23 May 2004 22:48:57 +0200, Stefan Trethan 
<stefan_trethan@g...> 
> wrote:
> 
> > Hi, while looking for direct inkjet printing i found:
> >
> > US 6,709,962 patent (i think one can't link to the page).
> >
> > Those patent documents are so damn long and i am way too 
impatient to
> > read them.
> >
> > I only wanted to post it here because we had the discussion a 
while ago.
> >
> > Anyone seen a direct inkjet patent?
> >
> > ST
> >
> >
> 
> 
> The doucument says at some point a conventional printer may be used 
> without much modification.
> I haven't seen the corona voltage issue adressed, but i haven't 
read the 
> whole of it.
> (the writing style makes me really sick...)
> 
> There really should be a inkjet priting pcbs patent but i can't 
find...
> 
> ST