Subject: | |
From: | |
Date: | Thu, 14 Nov 96 13:42:59 EST |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Randy,
As you are likely aware, IPC-A-610, section 4.2.2 states that "When
lead cutting is performed after soldering, the solder terminations
shall either be reflowed or visually inspected at 10X to ensure that
the original solder connection has not been damaged, (e.g. fractured),
or deformed."
My research has revealed that experts are divided on the need to
re-solder the joint after cutting. In practice, our company opts not
to re-solder and has built well over 200,000 assemblies without any
reliability issues. The assemblies are thoroughly tested as well.
- David Bruni
______________________________ Reply Separator _________________________________
Subject: ASSY: Lead Trim After Wave
Author: [log in to unmask] at cc_gate
Date: 11/13/96 5:51 PM
Is there a consensus one way or another on the practice of clipping
component leads after wave in regard to the effect on solder joint
reliability and the effect on reliability of leaving the clipped ends
untinned? The level of reliability expected is Class 3.
Thanks
Randy Johnson
Reliability Engineering
Woodward Governor Company
[log in to unmask]
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to: *
* [log in to unmask] with <subject: unsubscribe> and no text. *
***************************************************************************
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to: *
* [log in to unmask] with <subject: unsubscribe> and no text. *
***************************************************************************
|
|
|