Friends -
On Mon, Jan 16, 2006 at 12:38:33AM -0500, DJ Delorie wrote:
>
> FYI I've been building a spreadsheet of current prototype PCB fab
> houses, there are a number of inexpensive options these days, at
> least, if you don't mind dealing with foreign businesses (and if you
> can figure out their pricing structure from their web page).
I'm interested. Especially after someone else reports a positive
outcome. ;-)
> For example, Sierra Proto Express offers: 4 layer 6/6 w/ mask and
> silk, up to 60 sq in, $51/ea for qty 3+.
Um, I don't think 6 mil space/6 mil trace is fine enough to
successfully use on 1mm pitch BGA. Theory tells me 6 mil space
and 5 mil trace rules (or vice versa) are the minimum.
It's hard to find modern parts (e.g., Xscale-class cpu,
or a mid-size FPGA) that is not in a BGA.
- Larry
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