Article: More on Lead-free PCBs

Article: Part 4: How to Test and Assess Lead-free Reliability
SMT;  December 1, 2006 ;     700+ words ......material) and the process must be considered. Solder joint reliability and assembly integrity depend...process that puts them together. An inferior solder joint material cannot make a superior solder joint. It should be noted that a solder joint...

Article: Solidification Shrinkage Defects in Electronic Solders
JOM;  June 1, 2005 ;     700+ words ......studies have examined their impact on solder joint reliability. Nevertheless, they warrant...topography and the microstructure of a solder joint are of critical importance in assessing...topography and microstructure of the solder joint. Although volumetric contraction, or...

Article: Part 3: Testing and Assessing Lead-free Reliability
SMT;  August 1, 2006 ;     700+ words ......parameters and tactics that can enhance solder joint reliability and PCB assembly integrity...enhancements. Three ways to maximum solder joint reliability are: * Minimize the mismatch...components and PCB substrate that a solder joint is destined to join. * Make the component...

Article: New surface mount technology research from Shanghai University discussed.
Journal of Technology;  June 16, 2009 ;     432 words ......equation of Sn-4.0Ag-0.5Cu lead free solder joint by using results of solders joint reliability...Also to present a novel device for solder joint reliability test. Design/methodology...bending test of Sn-4.0Ag-0.5Cu lead free solder joint was carried out at three deflection...

Article: Step-by-Step
SMT;  March 1, 2008 ;     700+ words ......data, and reliability performance criteria. Solder Joint Reliability Solder joint life essentially is associated with creep and...How this damage mechanism progresses in a solder joint is associated directly with the elemental makeup...

Article: Lead-free Reliability for Harsh-environment Electronics
SMT;  March 1, 2007 ;     700+ words ......expansion coefficients on both sides of a solder joint, this also constitutes a harsh environment...and tin/lead? 7. How should you assess solder joint reliability and assembly integrity...not? 9. What differentiates lead-free solder joint fatigue failure from that of tin/lead...

Article: Problem solving with the PCB co-planar SMT connector.(TechKnow)
ECN-Electronic Component News;  November 15, 2004 ;     700+ words ......insertion or trace distortion. Certainly, solder joint reliability issues increased with the...through-hole towards re-flow technology. Solder joint robustness characteristics decreased...elements, the mechanical properties of the solder joint are less reliable for SMT applications...

Article: To Void or Not to Void?
SMT;  January 1, 2006 ;     700+ words ......found that solder voiding has no impact on solder joint reliability. This article highlights results...temperature-cycle testing. The SPVC compared solder joint void performance. The Solder Joint Debate Voids in solder joints are empty...

Article: Introduction: Assembly and Solderability. (The Board Authority).(printed circuit board industry, CircuiTree)(Brief Article)(Editorial)
CircuiTree;  April 1, 2002 ;     700+ words ......long-term reliability of the solder joint. Of course, there are a number...and variables that affect the solder joint. The surface finish quality is...influence the quality of the solder joint. That is why we were so determined...

Article: Estimating errors in FE analyses. (finite element)
Mechanical Engineering-CIME;  May 1, 1991 ;     700+ words ......from Swanson Analysis Systems Inc. (Houston, Pa.). Solder-Joint Example Consider a typical solder joint for a surface mount chip carrier. We want to determine the stiffness of the solder joint in the direction of 45 degrees to the x-axis in...

Article: Tin/silver/copper solder increases voids.(reports on solders)(Brief article)
Design News;  March 20, 2006 ;     167 words ......is producing greater voids in the solder joint. Voids in solder joints are empty...there is no evidence that the type of solder joint voiding observed in SAC-alloy joints had any affect on solder joint reliability. SLIME BUSTER: episode...

Article: Part 1: Testing and Assessing Lead-free Reliability
SMT;  April 1, 2006 ;     700+ words ......usually consider lead-free reliability as solder joint reliability. Needless to say, every solder connection is critical. However, both solder joint and package/assembly as a whole should...fundamentals behind them are understood. Solder joint reliability is understood with a ...

Article: Research from L.Z. Zhang and co-researchers in the area of components and packaging technology published.
Electronics Newsweekly;  April 8, 2009 ;     342 words ......quality evaluation of bumped solder joint connections in electronics packages...either incapable of detecting solder joint cracks, or unsuitable for inline...reasons. As an alternative, a novel solder joint inspection system is being developed...

Article: Lead-free: Component Compatibility Takes Center Stage
SMT;  March 1, 2005 ;     700+ words ...THE ROLE OF A SOLDER JOINT IN THE QUALITY AND RELIABILITY OF...PROPERTIES REQUIRED TO CREATE A VIABLE SOLDER JOINT. WHEN CONSIDERING MATERIALS IN LEAD-FREE...center stage. The doctrine of the solder joint as key to quality and reliability...