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Joseph Hebert
02/26/09 07:42
Read: 720 times
Okemah, Ok
United States


 
#162891 - plating
Responding to: Chris Bertrand's previous message
Hi Chris and Jackson,

I do not plate the holes. Instead I use a conductive epoxy from LPKF. It's applied on a vacuum table (I built my own instead of paying the price LPKF wanted for theirs) that draws the epoxy through the holes, coating the inside and forming the barrels.

I considered setting up to do plating, but as before I decided against keeping and disposing of the hazardous materials required. The trade-off is that my boards are only prototypes. They are not suitable for commercial or retail production. My vias and thru-holes hold up just fine to normal use, but they do not survive very many rework cycles. In other words, if I have to change out a thru-hole chip, there's a good chance I'm going to pull a barrel out with it.

If anyone is doing their own prototypes, you can get around plating by just soldering a small (28 ga/wire wrap gauge) uninsulated wire through the via. Even on thru-hole chips, the flat leads in round holes allow plenty of room for such a small wire.

Joe

List of 25 messages in thread
TopicAuthorDate
PCB prototype        Joseph Hebert      02/25/09 11:23      
   How does the LPKF machine do as a drill?      Richard Erlacher      02/25/09 16:09      
      tool life      Joseph Hebert      02/25/09 20:33      
         Well, I just guessed ...      Richard Erlacher      02/26/09 10:15      
            Expensive Drill      Joseph Hebert      02/26/09 10:30      
               Indeed! But useless for anything else.      Richard Erlacher      02/26/09 16:10      
                  Expensive? Yes. Useless? ...      Joseph Hebert      02/27/09 09:49      
                     True enough!      Richard Erlacher      02/27/09 10:00      
                        Dull Tools      Joseph Hebert      02/27/09 14:07      
                           dull tools      Richard Erlacher      02/27/09 14:29      
                              10 mil end mills      Joseph Hebert      02/27/09 14:53      
                                 Wet ?      Steve M. Taylor      03/01/09 15:34      
                                    Air cooled only      Joseph Hebert      03/01/09 15:57      
   Plating??      Chris Bertrand      02/25/09 20:54      
      plating      Joseph Hebert      02/26/09 07:42      
         I figured as such      Chris Bertrand      02/26/09 07:48      
   very good quality      JecksonS Ben      02/26/09 00:19      
   Impressive but..      Oliver Sedlacek      02/26/09 01:32      
      Prototyping prices      Joseph Hebert      02/26/09 08:07      
         Very interesting approach      Dave Brooks      02/28/09 13:43      
            PCBExpress      Joseph Hebert      02/28/09 21:41      
               Sunstone Circuits      Michael Karas      02/28/09 23:56      
                  Sunstone      Joseph Hebert      03/01/09 16:16      
                  P.S. Welcome back      Joseph Hebert      03/02/09 09:39      
               Now-a-days...      Dave Brooks      03/02/09 13:41      

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