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Electronics Forum | Mon Jun 25 03:52:24 EDT 2012 | awtm
Our Customer had detected tarnished pad on ImAg PCBA and had conducted several SEM-EDX test at the soldermask below some of the chip resistors. High concentration of sulfur was found and it can be significantly reduced after further chemical cleaned
Electronics Forum | Mon Jun 25 11:33:20 EDT 2012 | davef
The immersion silver is an active surface and readily combines with sulfur from the environment. Silver sulfide tarnishes the surface and creates doubt about the integrity of the finish at inspection. [uyemura.com/library-4.htm] Your customer's boar
Used SMT Equipment | Chipshooters / Chip Mounters
Dear Sir, We have these HSP feeder in stock for sale now. Please feel free to contact us if you need. Thanks& Best Regards, Henry Yang Machine Model P/N Size Q'TY Remark TCM 4790/4796 CT0851L 8X4 mm PAPER 4 Big Tail TCM 4790/4796 CT0852L
Industry News | 2014-05-12 16:06:39.0
SMTA China announces that it presented awards for nine papers at the SMTA China East 2014 Conference Award Presentation Ceremony, held on Wednesday, April 23, 2014 at Shanghai World Expo Exhibition & Convention Center in conjunction with the SMTA China Annual Award Ceremony.
Industry News | 2007-11-29 23:33:45.0
As speakers at SMTA International, individuals make contributions to the industry by sharing their research and findings. To reward exceptional achievement, $1,000 awards and plaques are given for the Best of Conference Paper, Best of Proceedings Paper, and the Best International Paper.
Technical Library | 2021-04-08 00:30:49.0
As the electronic industry moves to lead-free assembly and finer-pitch circuits, widely used printed wiring board (PWB) finish, SnPb HASL, has been replaced with lead-free and coplanar PWB finishes such as OSP, ImAg, ENIG, and ImSn. While SnPb HASL offers excellent corrosion protection of the underlying copper due to its thick coating and inherent corrosion resistance, the lead-free board finishes provide reduced corrosion protection to the underlying copper due to their very thin coating. For ImAg, the coating material itself can also corrode in more aggressive environments. This is an issue for products deployed in environments with high levels of sulfur containing pollutants encountered in the current global market. In those corrosive environments, creep corrosion has been observed and led to product failures in very short service life (1-5 years). Creep corrosion failures within one year of product deployment have also been reported. This has prompted an industry-wide effort to understand creep corrosion
The quality automation and ease of use Youngpool provides is unmatched. The D-600P Automatic Splicing Machine from Youngpool Technologies is looking to shake up the SMT industry, on a budget. It can improve line utilization, half the amount
SMTnet Express, July 16, 2015, Subscribers: 23,036, Members: Companies: 14,463, Users: 38,550 Testing Printed Circuit Boards for Creep Corrosion in Flowers of Sulfur Chamber iNEMI (International Electronics Manufacturing Initiative) Qualification
SMTnet Express, March 17, 2022, Subscribers: 25,805, Companies: 11,547, Users: 27,113 Creep Corrosion On Lead-Free Printed Circuit Boards In High Sulfur Environments The material and process changes required to eliminate lead from
Lewis & Clark | http://www.lewis-clark.com/product-tag/paper/
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