TECHNET Archives

March 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:
"Larry Morse" <[log in to unmask]>
Date:
Tue, 25 Mar 1997 16:47:53 -0800
Content-Type:
text/plain
Parts/Attachments:
text/plain (47 lines)
Glenn,

Have you tried increasing the bend radius to be at least equall to the pin
thickness?  That's a standard that seems to work well in some similar
applications.

Larry Morse
Celwave RF
 ----------
 ------------------------ INTERNET MAIL ------------------------
From:   	[log in to unmask]
Subject:	ASSY:  Pin Fracture
Date:   	Tue, 25 Mar 97 14:28:45 PST

---------------------------------------------------------------------------
Technet,
	We are using an S-lead pin on some parts and recently noticed a
fracture in the tin coating and into the base metal.  We're fairly
confident 
this is a result of the forming operation. The pin is 7-mil thick and
formed 
on a 5-mil radius with Beryllium-Copper base metal and tin coating.  The
current amount of solder does not flow high enough to fill in the crack. 
We 
know this a reliability risk and are looking at options.
	What are some other things that could be done to prevent the fracture
from propagating or oxidation of the copper from occurring?  We have some
ideas, one of which is to change the pin.  Any suggestions will be greatly
appreciated.

Glenn Pelkey
Quality/Reliability Engineer
Maxtek Components Corp.
(503) 627-2084

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
* with <subject: subscribe/unsubscribe> and no text in the body.          *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************



ATOM RSS1 RSS2