Electronics Forum | Tue Jul 14 07:23:50 EDT 2020 | researchmfg
There is a misunderstanding that people think the IMC layer grows the thicker the stronger soldering strength. The IMC layer can be grown and distributed evenly at the interface location will be good enough. Once the IMC layer grows too thick and ove
Electronics Forum | Sun Mar 31 00:42:09 EDT 2013 | dhanish
Why we cannot run Pb Free BGA with Sn/Pb process but we can run high temp BGA(90/10) with Sn/Pb? Both require high temperature to form the IMC.Why there is a difference in the reliability?
Industry News | 2009-07-28 11:43:13.0
OSAKA, JAPAN — July 2009 — Nihon Superior Co. Ltd., a supplier of advanced soldering and brazing materials to the global market, announces that a new presentation about the challenges and issues in lead-free soldering is now available on the company’s Web site.
Technical Library | 2013-01-03 20:27:54.0
Electronics assemblies with large flip-chip BGA packages can be prone to either pad cratering or brittle intermetallic (IMC) failures under excessive PCB bending. Pad cratering cracks are not detected by electrical testing or non-destructive inspection methods, yet they pose a long term reliability risk since the cracks may propagate under subsequent loads to cause electrical failure. Since the initiation of pad cratering does not result in an instantaneous electrical signature, detecting the onset of this failure has been challenging. An acoustic emission methodology was recently developed by the authors to detect the onset of pad cratering. The instantaneous release of elastic energy associated with the initiation of an internal crack, i.e., Acoustic Emission (AE), can be monitored to accurately determine the onset of both pad cratering and brittle intermetallic (IMC) failures.
Investigation of Pad Cratering in Large Flip-Chip BGA using Acoustic Emission SMTnet Express January 3, 2013, Subscribers: 26072, Members: Companies: 9076, Users: 34113 Investigation of Pad Cratering in Large Flip-Chip BGA using Acoustic Emission
Surface Mount Technology Association (SMTA) | https://www.smta.org/knowledge/journal.cfm
: An Exercise in Technically Sound Cost Reduction Bruce M. Misner Abstract 29-3 Evaluation of Reworkable Edge Bond and Corner Bond Adhesives for BGA Applications Fei Xie, Han Wu, Kelley Hodge, Swapan K
Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2022/06/Optimizing-Reflowed-Solder-TIM-sTIMs-Processes-for-Emerging-Heterogeneous.pdf
. The solubility of nickel in the indium is very low so diffusion-controlled growth of the intermetallic (IMC) layer is slow. On exposure to air, nickel forms a unsolderable oxide on its surface, so it is protected with a flash coating of gold. In
