11 Apr
2013
11 Apr
'13
3:07 p.m.
On Apr 11, 2013, at 2:32 PM, Jim Stephens <jws at jwsss.com> wrote:
worth noting on the thread, the flip chip boards were
going to be cut out of clad stock, not made up by a board house, and the poster was all
ready with gallons of Ferric Chloride and a resist pin to make his first board. and $20
each for the boards in that form. I would think having the boards made up for you by the
board house would come in for 1U Flip chips cheaper than that.
Oh yeah. For 2-sided boards? Sure. I know Andrew Lynch's S100 boards
run $20 each, and they're solder-masked and silkscreened as well, not
to mention about 3 times larger than a flip chip. And you don't even
need to turn your hands yellow.
I gave up ferric chloride etching in high school. I couldn't get the
yields up high enough. I was always tempted to try the photoresist
presensitized stuff, but it was EXPENSIVE, so I never did.
- Dave