At 7:11 am ((PST)) Thu Mar 1, 2007, otc_friend wrote:
>Can you describe what makes brass pcb different from copper pcb?
Yes: AFAIK there isn't any!
(You have misinterpreted 'brass' as an adjective instead
of a noun in order to extend its scope to 'pcb'.)
Brass pcb wouldn't work all that well commercially since
the zinc content might mess up the processing baths,
would mess up the solder chemistry, and brass is a
much poorer electrical conductor than copper.
Some contributors here use (photo)chemical etching to
make parts out of metal shim stock; for example stencils,
and chassis frames for model railway rolling stock.
It produces a high-precision result in material which is
too fragile for mechanical machining, without the
expensive machinery of EDM or ECM.
Regards, LenW