Homebrew PCBs

Henry,

How long would it take you to make a 1 1/4" x 3/4" with two 64 pin QFN IC's and aproximtyly 25-30 descrete 0402 SMS and a 4 layer PCB , then solder them all in place?




--- In Homebrew_PCBs@yahoogroups.com, "Richard" <richard.liberatoscioli@...> wrote:
>
> Hi Henry!
> 
> Look here for the conductive inks:
> 
> http://www.novacentrix.com/
> 
> 
> 
> 
> --- In Homebrew_PCBs@yahoogroups.com, Henry Liu <henryjliu@> wrote:
> >
> > I don't see the advantage of the flipping.
> > 
> > If you can print layers of conductive ink and non conductive ink then you
> > can just make a multilayer pcb and place the components on top.  You can
> > just make your final pads be all connected through the lower layers with the
> > equivalent of blind filled vias.
> > 
> > I don't think the conductive ink ejects well but I'd be very curious to hear
> > your results.
> > 
> > I've found some good UV curable inks but they're not cheap and they're not
> > conductive.
> > On Thu, May 20, 2010 at 2:59 PM, Richard
> > <richard.liberatoscioli@>wrote:
> > 
> > >
> > >
> > >
> > >
> > > Hi James!
> > >
> > > "....difficulty getting all the components lined up at exactly the same
> > > height...."
> > >
> > > You lost me here ... all the SMD's lay in flat down against the flat
> > > surface of the substrate, easily keeping all the SMD's at the same level.
> > >
> > >
> > > --- In Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>,
> > > "richard.liberatoscioli" <richard.liberatoscioli@> wrote:
> > > >
> > > >
> > > >
> > > > --- In Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>,
> > > "James" <jamesrsweet@> wrote:
> > > > >
> > > > > I think you would have difficulty getting all the components lined up
> > > at exactly the same height and making reliable connections. It would be
> > > interesting to try but if I were trying to make something so complex I'd
> > > have a batch of boards made.
> > > > >
> > > >
> > >
> > >  
> > >
> > 
> > 
> > [Non-text portions of this message have been removed]
> >
>