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JEDEC 和IPC发布锡须检验测试标准以及在实际应用中减轻其对可靠性影响的指导方针
来源: fbe-china.com作者: EM Asia China时间:2019-10-23 11:04:30点击:7972

JEDEC and the International Electronics Manufacturing Initiative (iNEMI) announced the availability of two documents intended to help manufacturers reduce the risk of tin whiskers in lead-free products. The first is JEDEC standard JESD201, Environmental Acceptance Requirements for Tin Whisker Susceptibility of Tin and Tin Alloy Surface Finishes, and the second is a JEDEC/IPC joint publication, JP002, Current Tin Whiskers Theory and Mitigation Practices Guideline. JESD201, developed by the JEDEC JC-14.3 Subcommittee on Silicon Device Reliability Qualification and Monitoring and the iNEMI Tin Whisker User Group, provides a uniform environmental acceptance testing and reporting methodology for tin whisker susceptibility of tin and tin alloy surface finishes used in the electronics industry. It is intended to be used with JESD22-A121, Test Method for Measuring Whisker Growth on Tin and Tin Alloy Surface Finishes (published May 2005, with a revision released in October 2005). JP002 provides guidance in understanding the prevalent theories regarding tin whisker formation, the driving force behind tin whisker growth, and mitigation practices used to minimize whiskers. It serves as a source of background information for JESD22A-121and JESD201. The publication was developed by JEDECrsquo;s JC-14.1 Subcommittee on Reliability Test Methods for Packaged Devices in conjunction with the IPC 5-23e Tin Whiskers Guideline Task Group, and includes significant input from the iNEMI Tin Whisker Users Group. Although it is not possible to guarantee that whiskers will not grow under field conditions, the mitigation practices detailed in JP002, combined with the test and acceptance criteria outlined in JESD201, form the cornerstone of a three-fold strategy of mitigation practices, process controls and verification testing that helps to reduce the risks of tin whiskers, said Joe Smetana, principal engineer, advanced technology, for Alcatel and chair of the iNEMI Tin Whisker User Group. This standard set of testing requirements and associated acceptance criteria are crucial to users, who want to ensure product reliability, as well as to suppliers, who can now proceed with one set of criteria to test and evaluate their finishes rather than trying to meet varying requirements from multiple customers. These joint documents will help the electronics industry move forward to implement reliable and compliant Pb-free products, said Bruce Euzent of Altera Corporation, chairman of the JC-14.3 Subcommittee on Silicon Device Reliability Qualification and Monitoring. There was a tremendous amount of cooperative work throughout the worldwide electronics industry to develop these documents. Tin Whisker Standards/page 2 JESD201, JP002 and JESD22-A121 can be downloaded from the JEDEC website at: http://www.jedec.org/DOWNLOAD/search/JESD201.pdf http://www.jedec.org/DOWNLOAD/search/JP002.pdf http://www.jedec.org/download/search/22a121-01.pdf Tin Whisker Workshop iNEMI, in conjunction with IEEE, CPMT and ECTC, is sponsoring the Third Tin Whisker Workshop on May 30 as part of IEEErsquo;s Electronic Components and Technology Conference (ECTC; http://www.ectc.net). The full-day workshop in San Diego, California, will provide an update on work that has been done in both the testing and modeling of tin whiskers. In addition, a roundtable discussion will provide insight into the intent of the JEDEC/IPC specifications and will also discuss implementation of the new standards. For more information about the tin whisker workshop, go to http://www.inemi.org/cms/calendar/06_ECTC_TW_Workshop.html

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