In one word.  YES!    .200 thick parts with  holes that small will tend to
plug at HAL every time. It most likely will not affect every hole on a board
but I would bet it effects some holes on every board.  This is also very
difficult and time consuming to sort for. I would not be surprised if you
actually received some plugged hole even after your suppliers inspection.

ED Cosper

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Darrel Therriault
Sent: Wednesday, March 29, 2000 7:13 PM
To: [log in to unmask]
Subject: [TN] B/P Yields

Technetters/Fabricators,

My supplier is having a problem with yield on our backplane (~.200",
SMOBC/HASL).  It seems to be centering around
hole plugging from HASL.  FHS are .024", .028", .032" for both pressfit and
pth connectors.  Is this a typical problem for
these requirements??

If so, what are other finishes to consider to achieve higher yields but not
introduce large cost adders??

Comments and suggestions appreciated.

Tks........DT

##############################################################
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 Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################

##############################################################
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 Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################