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FPGA lead finish / tin whiskers

Michael112
Beginner
300 Views

We have a legacy product that was designed using the Altera EPM7192SQC160-10 and we require additional components for support and repair. I have noted that the currently available product is RoHS compliant (EPM7192SQC160-10N). The ALTERA WP-CHMFGRELLDFR-2.0 white paper indicates that the leads may be plated with either "matte tin" or "tin/2% copper". Can you please advise the lead finish(s) on the EPM7192SQC160-10N and can you please advise if pure tin is used anywhere in the manufacturing of the product? Thank you.

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4 Replies
ChiaLing_T_Intel
Employee
288 Views

Hi Michael,

 

Thank you for contacting Intel Community. For your information, the common part number with the ‘N’ suffix at the last character represented the RoHS compliance (RoHS 6/6) part. For example, EPM7192SQC160-10N which ends with the ‘N’ suffix indicated it is RoHS compliant whereas without the ‘N’ suffix would be RoHS's non-compliant part. For further details, please click on the RoHS Compliant link for further details: https://www.intel.com/content/www/us/en/products/programmable/temperature.html

 

For EPM7192SQC160-10N, it is a lead-free product that contains Sn-3-4% silver(Ag)-0.5% Cu solder balls according to this white paper below:

https://www.intel.cn/content/dam/www/programmable/us/en/pdfs/literature/wp/wp_chmfgrelldfr.pdf

 

Thank you

 

Regards,

Chia Ling


Michael112
Beginner
274 Views

I had previously read that paper but it did not provide a definitive answer regarding the specific lead finish used on the EPM7192SQC160-10N. The information that I have indicates that the EPM7192SQC160-10N is in a leaded package (not in a BGA package). The paper indicates that "the industry has accepted the use of eutectic Sn-Ag-Cu for solder balls and either matte Sn or Sn-2%Cu for lead finishes". Given that the information I have indicates that this is a leaded package the paper indicates the use of "either matte Sn or Sn-2%Cu  for lead finishes". I had previously read this paper and was wanting to know if the EPM7192SQC160-10N used a matte Sn lead finish, or a Sn-2%Cu lead finish, or both (or either) lead finishes depending upon the manufacturing run.

ChiaLing_T_Intel
Employee
256 Views

 

Hi Michael,

 

EPM7192SQC160-10N is a lead-free product. By referring to the 160-Pin Plastic Quad Flat Pack (PQFP) - wire bond packaging datasheet, the lead finish of lead-free product is Matte Sn.

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ds/pkgds.pdf#page=77

 

Thank you

 

Regards,

Chia Ling


ChiaLing_T_Intel
Employee
227 Views

Hi Michael

 

We do not receive any response from you to the previous reply that I have provided. This thread will be transitioned to community support. If you have a new question, feel free to open a new thread to get support from Intel experts. Otherwise, the community users will continue to help you on this thread.

 

Thank you

 

Regards,

Chia Ling


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