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July 2009

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Subject:
From:
Karen Tellefsen <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Karen Tellefsen <[log in to unmask]>
Date:
Wed, 15 Jul 2009 14:28:05 -0400
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text/plain (106 lines)
All the formulations that I tested electromigrate at 85/85 -50V on IPC B 24
coupons (0.5mm spacing) and at 65/85 10V  on IPC B 25 B combs (12.5 mil
spaces), so that's too close.

Karen Tellefsen - Electrical Testing
[log in to unmask]
908-791-3069



                                                                           
             John Burke                                                    
             <jburke@OPTICHRON                                             
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             Sent by: TechNet          [log in to unmask]                     
             <[log in to unmask]>                                          cc 
                                                                           
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             07/15/2009 01:11          [TN] Silver epoxy                   
             PM                                                            
                                                                           
                                                                           
             Please respond to                                             
              TechNet E-Mail                                               
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             ; Please respond                                              
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                John Burke                                                 
             <jburke@OPTICHRON                                             
                   .COM>                                                   
                                                                           
                                                                           






Many years back (too many) I was working on silver epoxy connected hybrids
for high reliability applications.



I seem to recall that silver migration is a definite issue. Does anyone
have
any rules for mitigating this risk such as design clearances between pads
etc?



Best regards,





John Burke

Director of Operations





http://www.optichron.com

4221 Technology Drive

Fremont, CA 94538



Cell (408) 515 4992

Desk (510) 249 5233

Main (510) 249 5200




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