Download Lead-free solders by Narayan Prabhu; ASTM Committee D-2 on Petroleum Products and PDF

By Narayan Prabhu; ASTM Committee D-2 on Petroleum Products and Lubricants

"Eleven peer-reviewed papers deal with the environmental and health and wellbeing issues concerning the publicity to guide in the course of soldering and the good fortune and screw ups of lead-free solders. subject matters hide: components affecting the wetting habit of solders and evolution of interfacial microstructure ; Pb-free hot temperature solders for energy semiconductor units ; impact of floor roughness on wetting habit and evolution of Read more...

Show description

Read or Download Lead-free solders PDF

Similar extraction & processing books

Phase Diagrams and Ceramic Processes

Ceramic items are made from chosen and consolidated uncooked fabrics throughout the software of thermal and mechanical power. The advanced connec­ tions among thermodynamics, chemical equilibria, fabrication techniques, part improvement, and ceramic homes outline the undergraduate curriculum in Ceramic technological know-how and Ceramic Engineering.

Biodegradable Poly(Lactic Acid): Synthesis, Modification, Processing and Applications

"Biodegradable Poly (Lactic Acid): Synthesis, amendment, Processing and functions" describes the training, amendment, processing, and the study and purposes of biodegradable poly (lactic acid), which belong to the biomedical and environment-friendly fabrics. hugely illustrated, the publication introduces systematically the synthesis, actual and chemical changes, and the newest advancements of analysis and functions of poly (lactic acid) in biomedical fabrics.

Handbook of Materials Structures, Properties, Processing and Performance

This large wisdom base presents a coherent description of complicated issues in fabrics technological know-how and engineering with an interdisciplinary/multidisciplinary procedure. The booklet includes a old account of serious advancements and the evolution of fabrics basics, offering a massive point of view for fabrics concepts, together with advances in processing, choice, characterization, and repair lifestyles prediction.

Additional resources for Lead-free solders

Example text

5Ag and Sn-9Zn solders ͓2͔. The calculated EPL parameters are presented in Table 3 for both solder materials. High value of “K” results in rapid spreading in the initial stages of relaxation and a small value of n indicates that the liquid quickly spreads and attains equilibrium value of contact angle in a short period of time. The effect of roughness on EPL parameters was investigated. 5Zn solder are shown in Figs. 8 and 9. It was observed that both parameters ͑K and n͒ exhibited a decreasing trend with increasing substrate surface roughness.

Disk polishing on velvet cloth resulted in near uniform asperities, which results in the diffusion of a small amount of solder into the copper substrate that reacts with Cu to form a thin layer of IMC at the interface. Thin layer of IMC at the interface indicates poor wetting of solder. The uniform asperities of smooth surface act as barriers to the diffusion of liquid solder into the base metal. Hence, the solder material shows poor wettability on disk polished Cu substrates. 5Zn alloys, respectively.

97, 1997, pp. 1–5. Vaynman, S. and Fine, M. , “Development of Fluxes for Lead-Free Solders Containing Zinc,” Scr. , Vol. 41, No. 12, 1999, pp. 1269–1271. Peebles, D. , Peebles, H. , and Ohlhausen, J. , A, Vol. 144, 1998, pp. 89–114. Plas, H. A. , Cinque, R. , Vol. 48, No. 4, 1997, pp. 1–7. , “Evaluation of Lead ͑Pb͒-Free Ceramic Ball Grid Array ͑CBGA͒: Wettability, Microstructure and Reliability,” Electronic Components and Technology Conference, May 29–June 1, 2001, IEEE/ CPMT,ECA, Orlando, FL, pp.

Download PDF sample

Rated 4.41 of 5 – based on 7 votes