>I found
><http://www.lpkfusa.com/RapidPCB/ThroughHolePlating/proconduct.htm>
>very interesting. They have a paste that is essentially squeegeed
>into the holes, vacuumed out to clear the center of the hole, then
>baked in an oven to cure. They have a kit,l but the active paste is
>available for $240 for 20 of the 2.5 gm packages. Not cheap, but not
>too bad, especially if you can reuse open packets.
>
>Mark
>
>
>At 02:46 PM 1/20/2009, you wrote:
>
> >The problem seems there isn't any. Manufactures and resellers make a lot
> >of money from this. You will only find the 'users manual'. The most
> >'newbie' thing out there is Markus Zingg page that is not found
> >googling. (available on links here, thanks!)
> >My starting point was those manuals and MSDS from megauk, and some other
> >manufactures easyly find googling. Then I read what pcb's manufactures
> >say about they process in about 250 boardhouse webpages. Then google
> >about those process. Found almost nothing, except patents and so. The
> >link i give in the last post about pcb hole plating activation history
> >is the most valuable thing i found.
> >
> >So
> >http://www.megauk.com/datasheets/5050_Data_Sheet_ABC_Panel_Plating_
> Instructions_(ver.11.08).pdf
> >http://www.thinktink.com/stack/volumes/volvi/copplate.htm
> >http://electrochem.cwru.edu/ed/encycl/art-e01-electroplat.htm
> >http://nr.stpi.org.tw/ejournal/proceedingA/v23n3/365-368.pdf
> >
> >These are the things that more worth the time reading.
> >
> >The baths are desmear-activation-platting, and have rinse and cleaners
> >baths between them. But for few homemade board activation and plating is
> >enough.
> >Activation is the most tricky part but is can be done in chemical bath
> >of many compositions i already told a mechanical way that can work...
> >and found another way.
> >Sodium metal is made from electrolysis of salty water. If you could make
> >an electrolysis between the two copper layers in a sodium bath of NaOH,
> >NaCO3 etc (NaCl shouldn't work) maybe it can leave the sodium inside the
> >hole. You need an high impedance power supply for this, limiting current
> >should be used. When the board short circuits it should be plated inside
> >the holes. (My guess)
> >
> >Simao
> >
> >Juan EA7FNJ wrote:
> > >
> > > Hi guys!
> > >
> > > Well, my problem is the chemistry: I would like to find a good guide
> > > about electroplating, but I don't find anything.
> > >
> > > Do you know about a good guide?
> > >
> > > 73
> > >
> > > --- In Homebrew_PCBs@yahoogroups.com, Simao Cardoso <simaocardoso@...>
> > > wrote:
> > > >
> > > >
> > > > I have just remembered other thing, once i read from some
> already dated
> > > > IPC documents, a way to activate the holes, beautiful for it
> > > simplicity.
> > > > Not much info just named and short explained, and that was still in
> > > > development.
> > > >
> > > > It consists in activate while drilling. The drill bit, make
> de hole and
> > > > then entered in a metallic bath, when exit the hole will place the
> > > > metallic components in the hole wall, while still rotating.
> > > >
> > > > Because all the dust made while drilling it should be better to drill
> > > > and clean first and then redrill with a tin or silver or other type
> > > > solution, in a soft cloth or so under the board.
> > > >
> > > > It can be an old, forgotten and bad results experiment, i
> just remember
> > > > to name it here.
> > > >
> > > > Simao
> > > >
> > > > Markus Zingg wrote:
> > > > >
> > > > > Juan,
> > > > >
> > > > > How to use it greatly depends on the chemistry used. The
> > > chemistry even
> > > > > defines howmany tanks you need, wether they are heated, the
> > > processing
> > > > > parameters etc. etc. My best advice to you is to first organize a
> > > > > chemistry, cause it's supplier will be able to tell you the
> > > processing
> > > > > requierements. Then build your station along them.
> > > > >
> > > > > HTH
> > > > >
> > > > > Markus
> > > > >
> > > > > Juan EA7FNJ schrieb:
> > > > > >
> > > > > > Hi guys!
> > > > > >
> > > > > > Ok, great machine! but, I can see how to make one but,
> where is the
> > > > > > manual 'how to use it'?
> > > > > >
> > > > > > xD
> > > > > >
> > > > > > --- In Homebrew_PCBs@yahoogroups.com
> > > > > > <mailto:Homebrew_PCBs%40yahoogroups.com>, "Steve" <alienrelics@>
> > > > wrote:
> > > > > > >
> > > > > > > Have you checked the Links under "Plated Through Holes" yet?
> > > Not many
> > > > > > > links there, but it is something. Markus Zingg's page on
> > > through hole
> > > > > > > plating has been down for a while, but I just found
> where someone
> > > > > > > mirrored it and put that link in place of the missing site.
> > > > > > >
> > > > > > > http://tech.groups.yahoo.com/group/Homebrew_PCBs/links
> > > > > > <http://tech.groups.yahoo.com/group/Homebrew_PCBs/links>
> > > > > > >
> > > > > > > If you find any other links on through-hole plating, please
> > > place
> > > > them
> > > > > > > there.
> > > > > > >
> > > > > > > Steve Greenfield
> > > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> >
> >
> >------------------------------------
> >
> >Be sure to visit the group home and check for new Links, Files, and Photos:
> >http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
>
>------------------------------------
>
>Be sure to visit the group home and check for new Links, Files, and Photos:
>http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>