[Arm-netbook] libre laptop power board, needs 2oz copper, any recommendations?

[peter green]

On 03/09/15 02:12, Luke Kenneth Casson Leighton wrote:
> ok, i checked with the eurocircuits online system, they can't handle
> the power board.
>    
It's worth actually contacting PCB vendors with your requirements. The 
specs listed for the online pool/quick quote type services are often not 
the absolute limits of what the vendor can do.
> the LTC4155 is handling 4 amps, so the app note says that 2oz copper
> is needed.  however, eurocircuits require a minimum track-to-track
> clearance of 10mil which is totally incompatible with the distance
> even between pads of the LTC4155 IC!
>    
LTC recommend 0.25 mm pads and the chip has a 0.5 mm pad pitch which 
leaves a 0.25 mm between pads.

That is under 10 mil but only barely.
> therefore we conclude, simply, that eurocircuits doesn't have good
> enough equipment, therefore it is necessary to find an alternative PCB
> prototyping company.
>
> i've managed to get the track-to-track distance to 7mil, smallest via
> is 10mil with a 24mil ring, track width is a minimum of 8mil, and the
> size of the PCB is tiny: 3.4in x 1.2in.  it's only two layer,
> components only on one side, but the copper needs to be 2oz.
>
> can anyone help with PCB manufacturing at all?
>    
If you get desperate then contact zot, if they can't make it then 
proabablly noone can.