-lead-freeelectronics：they＼u20xxreheretostay-資料下載頁
2025-07-22 08:07本頁面
【正文】 ? Resistant to damage during handling ? Improved shelf life over other finishes ? Free of ionic contaminants ? Compatible with most flux chemistries ? Flatter than HASL PWBs ? Materials Considerations ? Reliability in processing ? Warpage of PWB ? Must be able to survive multiple reflows ? High Tg doesn’t necessarily mean laminate can survive high soldering temperatures ? PTH reliability ? Hightemperature reflows also affect inks, adhesives and markings Equipment ? New Equipment Considerations ? Solder pots ? Reflow ovens ? Concerns ? Cost of new equipment ? Downtime for transition and training staff ? Space limitations ? May not be necessary in all cases When Given Lemons, Make Lemonade Roadblocks and Resolutions ? Lack of singularity of alloy ? Industry needs to continue consortia efforts in downselection of alloys ? Rework and repair impact ? Need markings to indicate board is lead free ? Recycling requirements ? Monitor statelevel activities ? Call upon consortia to make requirements ? Worker safety/exposure issues ? Need data from EPA’s DfE ASF project Roadblocks and Resolutions ? No definition for lead free ? Call on IPC membership to take initiative ? Possibly %? ? Lack of industry partnership ? Continue efforts through consortia activities, such as roadmap development ? Need to know process requirements ? Industry must share experiences ? Go to suppliers for information ? Industrysponsored leadfree assembly training Roadblocks and Resolutions ? Need to know process requirements ? Industry must share experiences ? Go to suppliers for information ? Industrysponsored leadfree assembly training ? Lack of reliability and longterm data ? Sharing of data ? Consortia must team together ? Accept or develop data for specific applications ? Focus on what data is needed ? Dissemination and acceptance of data Roadblocks and Resolutions ? Toxicity/environmental impact of alternatives not clear ? Need data from EPA ? Care in selecting an alternative that won’t face potential ban ? No government pressure in US to switch to lead free ? To preclude an possible legislative activities, industry should take the initiative to research alternatives in anticipation of US legislation Roadblocks and Resolutions ? Slow pace of standards development ? Rigorous streamlining of standards revision process ? Standards revision must focus on leadfree as a priority ? Intensify liaison work with international associations ? Industry sectorization of standards and specifications (., telemunications, automotive) The Path Ahead ? IPC will remain active in lead free arena ? Mustn’t allow industry to fet again ? Continue to provide information ? Periodic roadmap updates ? Industry needs to be prepared ? Legislation may hit US shores ? IPC will not oppose any legislation ? Japanese leadfree consumer electronics to be released in US This year! Do you want to be a market leader, or a market follower?
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