Darrel:

HASL on 200 mil thick boards is in my view asking for trouble. I would
suggest alternatives to HASL at the very least.
If I understand correctly, are you having your press-fit holes plug with
solder due to the HASL process?
Charlie

--- Original Message -----
From: Darrel Therriault <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, March 29, 2000 7:12 PM
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
##############################################################