Homebrew PCBs

At 03:05 PM 5/3/02 -0500, hans@... wrote:
>Dwayne,
>Thanks for the interesting insight.
>What if anything is your solution for via connections ?
>
>BTW I think  "stripper is Caustic Soda (Sodium Hydroxide)" is the same
>as Red Devil Lye ! I buy it at Krogers, may be somewhat cheaper.

We haven't tried to mill any double sided boards - those are done with the 
photo process or, more commonly these days, sent off to AP circuits.  But I 
try to avoid vias by routing top side traces to IC pins or any other 
component with accessible pads (not covered by the component).  Where I 
can't avoid top side connections that are covered by the component's body, 
I use the "Copperset" via repair system from Multicore.  Vias that are 
occur in traces (no component leads) generally use Harwin track pins.

Top side IC connections are no problem when soldering the chip directly to 
the PCB or by using machined pin IC sockets (Augat, Asman, etc).

Thanks for the info on the Red Devil Lye - I'll keep it in mind.  We bought 
50 Lb bags of Potassium Carbonate and Sodium Hydroxide years ago from one 
of the industrial chemical supply houses (it was cheap) and still have lots 
left.

dwayne


Dwayne Reid   <dwayner@...>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax

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