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Supplier: Shenzhen Grande Electronics Layers: 4 PCB：FR-4/1.6mm, 1oz finished copper Project: Parking Equipment and Systems PCB Assembly Process | Introduction To PCBA | PCBA Grande Surface Treatment: ENIG PCBA Lead time:2-3 weeks Packing: Anti-stati
Electronics Forum | Thu Jun 27 21:28:42 EDT 2002 | davef
You're correct that the Ni/Pd termination seems to have something to do with you solder balling. It could be related to the interaction between your paste and the Pd. I assume these are really 'fines' rather than 'balls'. Things that come to mind a
Electronics Forum | Fri Nov 02 03:26:40 EDT 2012 | spopov
Hello! We want to try Lead Free paste Sn42/Bi58. Can we use this paste with Lead fihish such as HASL. I am worry about low melting temperature of 138C.
Industry News | 2020-02-25 12:51:11.0
MIRTEC will exhibit at the SMTA Dallas and Houston Expo & Tech Forums. The Dallas Expo is scheduled to take place Tuesday, March 24, 2020 at the Plano Event Center in Plano, TX, and the Houston Expo will be held Thursday, March 26, 2020 at The Stafford Centre in Stafford, TX.
Industry News | 2013-09-13 17:01:33.0
MIRTEC, “The Global Leader in Inspection Technology”, will exhibit its award-winning line of 3D AOI and SPI Inspection Systems at SMTAI 2013 booth #722. This three-day event is scheduled to take place October 15-16, 2013 at the Fort Worth Convention Center in Texas.
Technical Library | 2022-10-31 17:30:40.0
This paper presents a quantitative analysis of solder joint reliability data for lead-free Sn-Ag-Cu (SAC) and mixed assembly (SnPb + SAC) circuit boards based on an extensive, but non-exhaustive, collection of thermal cycling test results. The assembled database covers life test results under multiple test conditions and for a variety of components: conventional SMT (LCCCs, resistors), Ball Grid Arrays, Chip Scale Packages (CSPs), wafer-level CSPs, and flip-chip assemblies with and without underfill. First-order life correlations are developed for SAC assemblies under thermal cycling conditions. The results of this analysis are put in perspective with the correlation of life test results for SnPb control assemblies. Fatigue life correlations show different slopes for SAC versus SnPb assemblies, suggesting opposite reliability trends under low or high stress conditions. The paper also presents an analysis of the effect of Pb contamination and board finish on lead-free solder joint reliability. Last, test data are presented to compare the life of mixed solder assemblies to that of standard SnPb assemblies for a wide variety of area-array components. The trend analysis compares the life of area-array assemblies with: 1) SAC balls and SAC or SnPb paste; 2) SnPb balls assembled with SAC or SnPb paste.
Technical Library | 2013-01-24 19:16:35.0
The electronics industry has mainly adopted the higher melting point Sn3Ag0.5Cu solder alloys for lead-free reflow soldering applications. For applications where temperature sensitive components and boards are used this has created a need to develop low melting point lead-free alloy solder pastes. Tin-bismuth and tin-bismuth-silver containing alloys were used to address the temperature issue with development done on Sn58Bi, Sn57.6Bi0.4Ag, Sn57Bi1Ag lead-free solder alloy pastes. Investigations included paste printing studies, reflow and wetting analysis on different substrates and board surface finishes and head-in-pillow paste performance in addition to paste-in-hole reflow tests. Voiding was also investigated on tin-bismuth and tin-bismuth-silver versus Sn3Ag0.5Cu soldered QFN/MLF/BTC components. Mechanical bond strength testing was also done comparing Sn58Bi, Sn37Pb and Sn3Ag0.5Cu soldered components. The results of the work are reported.
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SMTnet Express, November 6, 2014, Subscribers: 23500, Members: Companies: 14091, Users: 37109 Effect of Process Variations on Solder Joint Reliability for Nickel-based Surface Finishes Hugh Roberts, Sven Lamprecht, Gustavo Ramos, Christian Sebald
Blackfox Training Institute, LLC | https://www.blackfox.com/blog/guide-to-a-successful-lead-free-soldering/
. Lead-free soldering produces a clean and excellent finish and has less risk of corrosion. For this reason, lead-free soldering is used in many of the latest consumer electronics that we use today
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