Homebrew PCBs

You guys might like to see this:

http://www.freepatentsonline.com/5849066.html

Quite close to the inkjet technique described in this forum.
There is also a nice mention at the bottom about the composition of the Epson Glossy Paper.

[Non-text portions of this message have been removed]

very very interesting...
seems to be possible to just mix the mentioned fluids and
works on both Epson and HP (thermal) printers.
somebody has access to these chemicals???


http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5849066.PN.&OS=PN/5849066&RS=PN/5849066

or just search for number 5849066 at http://patft.uspto.gov

--- "GiuseppeG." <ggpp23@...> wrote:

> You guys might like to see this:
> 
> http://www.freepatentsonline.com/5849066.html
> 
> Quite close to the inkjet technique described in this
> forum.
> There is also a nice mention at the bottom about the
> composition of the Epson Glossy Paper.
> 



 
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Get new email alerts with the free Yahoo! Toolbar.
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If I remember right a clean PC board spin coated with a gelling agent 
and ammonium or potassium bichromate and then painted with methanol or 
methyl alcohol in an ink jet should make a water insoluble track that 
can be developed to more resistant coating after the the unhardened 
stuff is removed.

The date of discover was a lab spill in 1958 or 1959.

Gordon  W5RED

GiuseppeG. wrote:

>
> You guys might like to see this:
>
> http://www.freepatentsonline.com/5849066.html 
> <http://www.freepatentsonline.com/5849066.html>
>
> Quite close to the inkjet technique described in this forum.
> There is also a nice mention at the bottom about the composition of 
> the Epson Glossy Paper.
>
> [Non-text portions of this message have been removed]
>
> 
>
> <http://groups.yahoo.com/group/Homebrew_PCBs/message/18792;_ylc=X3oDMTM2OWNxc3BzBF9TAzk3MzU5NzE0BGdycElkAzQ1MDUzNjEEZ3Jwc3BJZAMxNzA1MDgzMjkxBG1zZ0lkAzE4NzkyBHNlYwNmdHIEc2xrA3Z0cGMEc3RpbWUDMTE4MTUzMzU2MgR0cGNJZAMxODc5Mg--> 
> <http://groups.yahoo.com/group/Homebrew_PCBs/post;_ylc=X3oDMTJxbXY1NmxpBF9TAzk3MzU5NzE0BGdycElkAzQ1MDUzNjEEZ3Jwc3BJZAMxNzA1MDgzMjkxBG1zZ0lkAzE4NzkyBHNlYwNmdHIEc2xrA3JwbHkEc3RpbWUDMTE4MTUzMzU2Mg--?act=reply&messageNum=18792>

I would try starch and potassium bichromate on the board. Chromate are 
hexivalent. If you need to make it stick a little geletain. Keep it out 
of green light and shorter wave lengths. And use the not so nasty stuff 
in the pinter.

Bichromates were used for years as the photo active agent for making 
circuit broads. Potassium Bichromate in geletan exposed to UV will 
harden and the rest can be washed off and then etched. You are looking 
for something to take the place of light. It only needs to catalyze the 
binding of the hexivalent Chromium to the binder on the broad.

Gordon


Herbert E. Plett wrote:

>
> very very interesting...
> seems to be possible to just mix the mentioned fluids and
> works on both Epson and HP (thermal) printers.
> somebody has access to these chemicals???
>
> http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5849066.PN.&OS=PN/5849066&RS=PN/5849066 
> <http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5849066.PN.&OS=PN/5849066&RS=PN/5849066>
>
> or just search for number 5849066 at http://patft.uspto.gov 
> <http://patft.uspto.gov>
>
> --- "GiuseppeG." <ggpp23@... <mailto:ggpp23%40gmail.com>> wrote:
>
> > You guys might like to see this:
> >
> > http://www.freepatentsonline.com/5849066.html 
> <http://www.freepatentsonline.com/5849066.html>
> >
> > Quite close to the inkjet technique described in this
> > forum.
> > There is also a nice mention at the bottom about the
> > composition of the Epson Glossy Paper.
> >
>
> __________________________________________________________
> It's here! Your new message!
> Get new email alerts with the free Yahoo! Toolbar.
> http://tools.search.yahoo.com/toolbar/features/mail/ 
> <http://tools.search.yahoo.com/toolbar/features/mail/>
>
>