Technical Library | 2014-01-23 16:49:55.0
As reliability requirements increase, especially for defense and aerospace applications, the need to characterize components used in electronic assembly also increases. OEM and EMS companies look to perform characterizations as early as possible in the process to be able to limit quality related issues and improve both assembly yields and ultimate device reliability. In terms of BGA devices, higher stress conditions, RoHS compatible materials and increased package densities tend to cause premature failures in intermetallic layers. Therefore it is necessary to have a quantitative and qualitative test methodology to address these interfaces.
Industry News | 2012-02-15 19:03:23.0
Nihon Superior announces that its Senior Technical Advisor Keith Sweatman will present “The Effect of Composition on the Thickness Morphology and Growth of Interfacial Intermetallic in Pb-Free Solders” at the upcoming TMS Annual Conference. The presentation will take place during the session, titled “Pb-Free Solders and Other Materials for Emerging Interconnect and Packaging Technologies: Solder Alloy Design for Challenging Applications”.
Technical Library | 2007-03-08 19:31:10.0
Reflow profile has significant impact on solder joint performance because it influences wetting and microstructure of the solder joint. The degree of wetting, the microstructure (in particular the intermetallic layer), and the inherent strength of the solder all factor into the reliability of the solder joint. This paper presents experimental results on the effect of reflow profile on both 63%Sn 37%Pb (SnPb) and 96.5%Sn 3.0%Ag 0.5%Cu (SAC 305) solder joint shear force.
Technical Library | 2010-07-08 19:49:59.0
Aging characteristics of new lead free solder alloys are in question by many experts because of higher amount of tin’s effect on the diffusion of other metals, primarily copper, to create undesirable boundary intermetallics over long periods of time and even moderately elevated temperatures. A primary layer of intermetallics, Cu6Sn5 forms as the liquid solder makes contact with the solid copper substrate. This reaction however ceases as the solder temperature falls below that of liquidus. A secondary intermetallic Cu3Sn1, an undesirable weak and brittle layer, is thought to form over time and may be accelerated by even mildly elevated temperatures in electronic modules such as laptops under power. This project was designed to quantify the growth rate of Cu3Sn1 over an extended period of time in a thermal environment similar to a laptop in the power on mode.
Industry News | 2011-12-30 23:26:12.0
Nihon Superior has highlighted the effectiveness of Cu and Ni as the essential elements in forming a stable IMC layer in lead-free soldering.
Technical Library | 2015-02-12 16:57:56.0
Electronic systems are known to be affected by the environmental and mechanical conditions, such as humidity, temperature, thermal shocks and vibration. These adverse environmental operating conditions, with time, could degrade the mechanical efficiency of the system and might lead to catastrophic failures.The aim of this study is to investigate the mechanical integrity of lead-free ball grid array (BGA) solder joints subjected to isothermal ageing at 150°C for up to 1000 hours. Upon ageing at 150°C the Sn-3.5Ag solder alloy initially age-softened for up to 200 hours. This behaviour was linked to the coarsening of grains. When aged beyond 200 hours the shear strength was found to increase up to 400 hours. This age-hardening was correlated with precipitation of hard Ag3Sn particles in Sn matrix. Further ageing resulted in gradual decrease in shear strength. This can be explained as the combined effect of precipitation coarsening and growth of intermetallic layer. The fractured surfaces of the broken solder balls were also investigated under a Scanning Electron Microscope. The shear failures were generally due to ductile fractures in bulk solders irrespective of the ageing time.
Industry News | 2011-11-20 13:48:27.0
The Balver Zinn Group and Cobar Europe BV announces that it has been awarded a Global Technology Award in the Flux Materials category for its SCAN-Ge071-XF3+ solder paste.
Industry News | 2009-03-10 16:11:29.0
OSAKA, JAPAN � March 2009 � Nihon Superior Co. Ltd., a supplier of advanced soldering and brazing materials to the global market, announces that it will showcase a new, expanded range of SN100C products in booth 2564 at the upcoming APEX exhibition and conference, scheduled to take place March 31-April 2, 2009, in Las Vegas.
Industry News | 2012-07-10 11:27:53.0
Nihon Superior (Singapore) Pte. Ltd.,announces that it will showcase a new, expanded range of products in booth G2 at the upcoming IPCA INTERNATIONAL EXPO 2012, scheduled to take place July 25-27, 2012 in KTPO TRADE CENTRE, WHITEFIELD, in BANGALORE, INDIA.
Industry News | 2009-01-22 21:36:56.0
OSAKA, JAPAN � January 2009 � Nihon Superior Co. Ltd., an advanced soldering and brazing supplier to the worldwide market, introduces SN100C(510) lead-free flux cored solder wire.
