Technical Library | 2023-01-17 17:22:28.0
The impact of voiding on the solder joint integrity of ball grid arrays (BGAs)/chip scale packages (CSPs) can be a topic of lengthy and energetic discussion. Detailed industry investigations have shown that voids have little effect on solder joint integrity unless they fall into specific location/geometry configurations. These investigations have focused on thermal cycle testing at 0°C-100°C, which is typically used to evaluate commercial electronic products. This paper documents an investigation to determine the impact of voids in BGA and CSP components using thermal cycle testing (-55°C to +125°C) in accordance with the IPC- 9701 specification for tin/lead solder alloys. This temperature range is more typical of military and other high performance product use environments. A proposed BGA void requirement revision for the IPC-JSTD-001 specification will be extracted from the results analysis.
Technical Library | 2023-01-17 17:19:44.0
A test program was developed to evaluate the effectiveness of vacuum reflow processing on solder joint voiding and subsequent thermal cycling performance. Area array package test vehicles were assembled using conventional reflow processing and a solder paste that generated substantial void content in the solder joints. Half of the population of test vehicles then were re-processed (reflowed) using vacuum reflow. Transmission x-ray inspection showed a significant reduction in solder voiding after vacuum processing. The solder attachment reliability of the conventional and vacuum reflowed test vehicles was characterized and compared using two different accelerated thermal cycling profiles. The thermal cycling results are discussed in terms of the general impact of voiding on solder thermal fatigue reliability, results from the open literature, and the evolving industry standards for solder voiding. Recommendations are made for further work based on other void reduction methods and additional reliability studies.
Industry News | 2018-10-18 19:57:48.0
Industry-leading associations IPC and SMTA jointly announce the High-Reliability Cleaning and Conformal Coating Conference, scheduled to take place November 13-15, 2018 at Chicago Marriott, Schaumburg, Illinois. The conference is focused on the cleanliness of highly dense electronic assemblies to achieve quality and reliability within the stated in-field environment.
Industry News | 2023-02-13 15:22:16.0
Bob Cooke, Michael Ford, and Christina Rutherford take top honors
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.
Industry News | 2012-02-07 01:05:27.0
The SMTA is pleased to announce the Best Papers from SMTA International 2011. 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 Presentation, Best of Proceedings Paper, and the Best International Paper.
Industry News | 2013-09-10 12:18:26.0
The Surface Mount Technology Association (SMTA)'s Intermountain Chapter will hold its annual technical symposium on September 19 at the University of Utah in the Warnock Engineering Building, Salt Lake City, Utah.
Industry News | 2019-01-30 08:13:02.0
The SMTA is pleased to announce the Best Papers from SMTA International 2018. As speakers at SMTA International, individuals make contributions to the industry by sharing their research and findings. For these exceptional achievements, a cash award and plaque are given to all winners.
Industry News | 2011-01-10 19:20:49.0
Plans are ramping up for IPC APEX EXPO™, April 10–14 in Las Vegas, aimed at meeting the needs of the engineers, PCB designers and manufacturing wizards who are tasked with bringing today’s consumer, industrial and high-reliability electronic products to life. With a focus on education, IPC will bring industry experts from around the world to lead 50 half-day professional development courses covering critical topics in design, PCB manufacturing, electronics assembly and test — supporting electronics manufacturers as they develop the next generation of electronics.
Industry News | 2012-03-26 15:58:58.0
Tin whisker growth, risk mitigation, detection and failure analysis will be the focus of the IPC Tin Whiskers Conference, April 17–19, 2012, in Ft. Worth, Texas.
