Recently our bare board manufacturer indicated that his first pass yields
from his electrical test for our six layer board (FR4, couple of BGA, some
20mil QFPs, 7" x 11") was about 70%. We were concerned that this may mean
his process is not under control. He said that 50 to 75% first pass yield
was typical in the industry. The failures were for various reasons from
opens to mask on pads.

Does anyone have an opinion regarding 75% reflecting the first pass yield
as a benchmark of the board fab industry?

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################