Or how about "great" wetting that is in actuality really poor wetting?!
Alloy42 with stamping oil on it, covered with a solder finish by the
supplier, used in production, a unit then dropped and then the real truth
evident!

Bev Christian
Research in Motion

-----Original Message-----
From: Charles Caswell [mailto:[log in to unmask]]
Sent: October 6, 2001 2:54 PM
To: [log in to unmask]
Subject: Re: [TN] Poor wetting on solder joints


Wow, how long an answer do you want?  saw Steve' reply and agree that
"poor wetting" is sometimes a perception rather than reality. In
addition to what Steve described I have had several other "poor wetting"
issues that took considerable explanation to quality. A tapered lead
that has a large shoulder may have solder suddenly stop because of the
rapid heat dissipation at the larger area. This was being rejected
untill I could finally convince QA. of what was happening. Give us some
more info and I am sure you will get several relevant replies.
Charles Caswell
Process Lead, PCB
Frontier Electronic Systems

-----Original Message-----
From: TechNet E-Mail Forum. [mailto:[log in to unmask]]
Sent: Friday, October 05, 2001 8:59 AM
To: [log in to unmask]
Subject: [TN] Poor wetting on solder joints


What could be the cause of poor wetting on solder joints and how we can
solve it?

------------------------------------------------------------------------
---------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET
Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases
> E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for
additional
information, or 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 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET
Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases >
E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or 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 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------