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

[Luke Kenneth Casson Leighton]

ok, i checked with the eurocircuits online system, they can't handle
the power board.

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!

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?

tia,

l.

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[peter green]

Post by Luke Kenneth Casson Leighton
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.

Post by Luke Kenneth Casson Leighton
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.

Post by Luke Kenneth Casson Leighton
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.

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http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook

[Hrvoje Lasic]

Pls try to contact this guy:

Shenzhen Xinjiaye Electronics Technology Co.,ltd

508Room Yong Hui building Bao Yuan Road Shenzhen city,China
TEL:[phone]
Mobile:[phone]
Skype:nbdyummy
www.szxjypcb.com
sales-***@xjypcb.cn




*Global Sources Electronic Components ShowDate: 11th October 2015Place:
AsiaWorld-Expo, Hong KongBooth: 9G13*

*At very least you will get advice. They do prototypes but i don't know
about price. You can send him gerber files to check. If you decide they
make you complete prototypes,be extra careful with parts. When they buy on
local market they can mess / switch parts.*

Post by peter green

Post by Luke Kenneth Casson Leighton
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.

Post by Luke Kenneth Casson Leighton
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.

Post by Luke Kenneth Casson Leighton
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.
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--
Hrvoje Lasić
Vulpes d.o.o.
Gračanska 120a
10000 Zagreb
Croatia
tel [phone]
tel [phone]


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