Re: gEDA-user: SMD soldering challenge status

[DJ Delorie <dj@xxxxxxxxxxx>]

> Panasonic NP061A500A dual PNP with built in bias resistors is in a  
> package with a 0.35 mm pin pitch. $0.51 in 100's at Digikey. Is 350  
> µm fine enough? ;-)

I have down to 0.40mm pitch so far (the tvsop).  The problem becomes
finding cheap FABs at that pitch - 0.40mm is 7.89 mils, so we might
have to go to a more expensive fab.  0.35mm is 6.88 mil, which might
push us even further.  If Olimex can do the 0.40mm pitch with their 8
mil rules, that's about $35 for the PCB.  For 7 mil, we're up to $65
for the PCB, and at 6 mil it's about $70 (pcbbool) to $110 (4pcb)
depending on how much sq in we need.


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