Hi Jon - the minimum solderability coverage required by the JSTD-002 is 95%
and if a component vendor is not willing to sign up for that requirement,
it means they are not confident that their plating chemistry and/or plating
process can achieve the 95% minimum value. You need to determine if by
accepting a lower minimum value, such as the 90% figure, you will or will
not impact your soldering process workmanship requirements or solder joint
integrity.  Good Luck.

Dave Hillman
JSTD-002 Committee Chair
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             Jon Roberts                                                   
             <jroberts@DRS-TEM                                             
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                                                                   Subject 
             01/18/2007 04:12          [TN] MATTE TIN AND SOLDERABLILITY   
             PM                        REQUIREMENTS                        
                                                                           
                                                                           
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                Jon Roberts                                                
             <jroberts@DRS-TEM                                             
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Has anyone have Knowledge on solderablity of matte tin finish on
components?
Question came up today from an vendor of the component being purchased
will only guarantee 90% coverage in lieu of J-Std-002 95% coverage and has
requested relief from the J-Std-002 requirement.

Thanks, Jon

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