On Sat, 02 Jun 2007 16:03:47 GMT, "Michael A. Terrell"
wrote:

John Larkin wrote:

On Sat, 02 Jun 2007 05:42:14 GMT, "Michael A. Terrell"
wrote:

Jim Thompson wrote:

On Sat, 02 Jun 2007 02:56:25 GMT, "Michael A. Terrell"
wrote:

tempus fugit wrote:

I know this is probably a stupid question, but does 8 layers mean the parts
are on 8 different horizontal planes, all stacked on top of one another?

Thanks


No. Haven't you ever heard of Vias and plated through holes?

You've not heard of Mexican PCB's ?:-)


Hell, I've seen them. Cincinnati Electronics made and assembled the
boards for the modules used in the PRC-77 in Mexico. They had trouble
with double sided, with plated through holes.

Here's a bad via, on an 8-layer board, made in America!

John


Was it just one bad via on one board, or a whole bad batch?

Whole batch, maybe 5-20 bad vias per board. We canned that vendor.
Strange, because they had been OK for years. But we paid them for 100%
bare-board testing, and it was obvious that we didn't get it.

John