TECHNET Archives

October 1997

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Graham Naisbitt <[log in to unmask]>
Reply To:
TechNet Mail Forum.
Date:
Tue, 7 Oct 1997 07:22:23 UT
Content-Type:
text/plain
Parts/Attachments:
text/plain (59 lines)
Jim, I have the perfect test instrument to tell you if you will have a
reliable product.

Please let me have your snailmail and I will send this on to you.

Graham Naisbitt


Concoat Ltd                                     Email: [log in to unmask]
Alasan House, Albany Park                       Tel:    +44 (0)1276 691100
Camberley, Surrey GU15 2PL UK           Fax:    +44 (0)1276 691227


-----Original Message-----
From:   TechNet  On Behalf Of Jim Mathis
Sent:   Monday, October 06, 1997 10:20 PM
To:     [log in to unmask]
Subject:        [TECHNET] SMT soldering

In an effort to decrease defects on a mixed technology assembly with simple
SMT's on the "solder side" and thru-holes on the "comp side", we have adopted
the following process:   We are first gluing, solder-pasting and then
reflowing the SMT's.  We then flip the board, stuff the thru-holes, and
wave-solder.  This has enabled us to eliminate the "opens" with the reflowed
solder paste on the SMT's and dramatically reduce the "shorts".  However,
this process means the SMT's are reflowed and then waved.

The big question:   Are we introducing potential reliability problems?  Has
anyone out there also done this with no adverse long-term reliability
problems?

All feedback is welcome, especially good news!    Thanks, all.

##############################################################
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.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or
847-509-9700 ext.311
##############################################################

##############################################################
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.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
##############################################################


ATOM RSS1 RSS2