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June 2011

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Subject:
From:
"Upton, Shawn" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Upton, Shawn
Date:
Thu, 2 Jun 2011 13:51:25 -0400
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How far from the end of the component was the bend?  I can't tell from the pic.  I wonder if chipping is bound to happen if the components must be bent that close to the body.  That is to say, that chipping is inevitable due to the bend being that close; if the PCB design requires it that close, well, it's inevitable to have either lots of thrown-out resistors, or assemblies with resistors that are chipped.

AFAIK that is just paint chipping, not damage to the resistive element.

Shawn Upton, KB1CKT
Test Engineer
Allegro MicroSystems, Inc
[log in to unmask]
603.626.2429/fax: 603.641.5336

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jean-Francois Bissonnette
Sent: Thursday, June 02, 2011 1:31 PM
To: [log in to unmask]
Subject: [TN] How much damage is too much damage?

Hi Technetters,

 

I would like to have your thoughts on these damages on resistors.  The
picture section 9 of IPC (rev D) shows the middle of the resistor where the
cracked occurred.  In our case, the damage is more on either end of the
body.  Is it just as bad or could this be considered acceptable?

 

http://ipc-technet.groupsite.com/galleries/show/20088

 

Jean-François



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