NDLI: FE analysis and experimental testing of a 4-pin ceramic test vehicle with tin-lead and tin-silver-copper solder joints

Content Provider	IEEE Xplore Digital Library
Author	Spraul, M. Nuchter, W. Wunderle, B. Michel, B.
Copyright Year	2005
Description	Author affiliation: Robert Bosch GmbH, Stuttgart, Germany (Spraul, M.; Nuchter, W.)
Abstract	Solder joint lifetime predictions are typically based on FE simulation to determine the load on the joints and then an empirical equation to derive the expected lifetime. In this paper the authors presented a test vehicle for testing the lifetime of solder joints and the results that were obtained by temperature cycling, including the lifetime prediction models that were created based on the experimental results. The test vehicle is a ceramic substrate with four solder joints. It has a very simple geometry that is well-suited for FE analysis. The board is a two-layer PCB with traces for 4-wire resistance measurements. The resistance was measured in regular intervals and mean lifetimes were extracted for the observed failures by fitting the results to the Weibull-equation with a maximum likelihood estimator. Two solders were used for soldering the test vehicle to the PCB: eutectic tin-lead solder and eutectic tin-silver-copper solder. Temperature-shock tests were performed with four different test conditions. Based on these experimental results, coefficients for the two most common lifetime models, the Coffin-Manson equation and the creep strain energy density approach, were determined. The logarithmic standard deviation was used to quantify the mean error of the predictions from the lifetime models.
Sponsorship	IEEE - CPMT
Starting Page	441
Ending Page	447
File Size	1221955
Page Count	7
File Format	PDF
ISBN	0780390628
DOI	10.1109/ESIME.2005.1502846
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-04-18
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Iron Ceramics Vehicles Soldering Predictive models Equations Life testing Electrical resistance measurement Temperature Geometry
Content Type	Text
Resource Type	Article

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