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iNEMI Heads Hi-Rel RoHS Task Force
December 31, 1969 |Estimated reading time: 1 minute
HERNDON, Va. - The International Electronics Manufacturing Initiative (iNEMI) created the High-Reliability (Hi-Rel) RoHS Task Force and announced publication of recommendations to protect the dependability of high-reliability products as the supply chain moves to lead-free components. Consisting of OEMs and EMS providers, the Task Force calls for continued availability of tin/lead-compatible components for exempted products, as well as a standardized strategy of mitigation practices and testing methods to reduce the risk of tin whiskers. While certain products are exempt from the RoHS Directive, the supply chain is converting to lead-free without strict reliability requirements. Because many suppliers do not plan to offer SnPb products, compatibility issues have been identified as high-reliability OEMs and EMS providers try to “mix and match” lead-free components in exempted SnPb assembly processes.
Tin whisker mitigation is another area of concern. The predominant whisker mitigation strategy has been to add lead to the tin plating. With lead-free, many component suppliers are proposing the use of pure tin plating as an alternative. However, pure tin represents reliability risks because of the whisker-forming tendencies of pure tin and tin-alloy plating.
iNEMI Task Force companies will require electronic component suppliers to implement the following recommendations for high-reliability applications:
- Adopt one of the iNEMI-recognized whisker mitigation practices as a main part of Sn and/or high-Sn-content Pb-free plating processes, as outlined in the iNEMI Tin Whisker User Group’s Recommendations on Lead-free Finishes for Components Used in High-Reliability Products, Version 3.
- Perform testing and adhere to the qualification criteria of the iNEMI Tin Whisker Acceptance Criteria or the final agreement of the JEDEC JESD-201A qualification criteria, in conjunction with the JESD22-A-121 test method.
- Continue to provide an alternative non-whisker finish; such as SnPb or nickel/palladium/gold (NiPdAu), until requirements of iNEMI/JEDEC acceptance tests have been met.
The group’s recommendations are available at http://www.inemi.org/cms/projects/ese/High_Rel_RoHS.html.