Re: Solder to Aluminum?

Al wrote: 
In article <d8n8kf02gd4@xxxxxxxxxxxxxxxxx>,
 Chris Carlen <crcarleRemoveThis@xxxxxxxxxxxxxxx> wrote:

Hi:

I have voice coils wound with aluminum magnet wire that I need to solder to a flex-PCB with tin plated pads.

Any idea on the best alloy/flux combo for that? Low melting temperature possible would be best to avoid harming the polyimide PCB substrate.


Thanks.

Spot weld the aluminum wire to copper wire. If you don't want to spot weld, then use crimp hardware designed for aluminum/copper connections. Then solder the copper wire to whatever.


That would be a nice way to do things, if there was enough space. But the coil terminations are about 4mm long, recessed in a notch in the aluminum coil former. I have existing coils that I wish to rebuild, that were soldered, so I know it can be done.


Thanks for the input.

Good day!



--
_______________________________________________________________________
Christopher R. Carlen
Principal Laser/Optical Technologist
Sandia National Laboratories CA USA
crcarleRemoveThis@xxxxxxxxxxxxxxx
NOTE, delete texts: "RemoveThis" and "BOGUS" from email address to reply.
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