We have just identified a problem with PTH reliability caused by Wedge Voids.  We have determined that the voids are associated with occurrences of "Pink Ring".

This is a new problem for us, but we understand many other fabricators have successfully eliminated this defect from their products.  I would like to know what causes this problem and how to eliminate it.

We are focusing our efforts now on our Reduced Oxide pre-lamination treatment process and drilling.  

We are also concern about our the material based on the T 260 C - TMA Delamination test IPC650 2.4.24.1.

Any inputs would be welcome.   Thank you for your support.

                                Regards,

                                Jim Reed, Texas Instruments, Austin, TX

Voice = 512 250-7172,  
Fax =   512 250-7967,  
Email = [log in to unmask]

                                Regards,

                                Jim Reed, Texas Instruments, Austin, TX

Voice = 512 250-7172,  
Fax =   512 250-7967,  
Email = [log in to unmask]

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