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Displaying records 41 to 50 of 420 records.
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41. Non-destructive Measurement of the Residual Stresses in Copper Through-Silicon Vias using Synchrotron Based Micro-beam X-ray Diffraction
Topic: Materials Science
Published: 7/1/2014
Authors: Chukwudi Azubuike Okoro, Lyle E Levine, Yaw S Obeng, Klaus Hummler, Ruqing Xu
Abstract: In this study, we report a new method for achieving depth resolved determination of the full stress tensor in buried Cu through-silicon vias (TSVs), using synchrotron based X-ray micro-diffraction technique. Two adjacent Cu TSVs were analyzed; on ...

42. Synchrotron-Based Measurement of the Impact of Thermal Cycling on the Evolution of Stresses in Cu Through-Silicon Via
Topic: Materials Science
Published: 6/30/2014
Authors: Chukwudi Azubuike Okoro, Lyle E Levine, Ruqing Xu, Klaus Hummler, Yaw S Obeng
Abstract: One of the main causes of failure during the lifetime of microelectronics devices is their exposure to fluctuating temperatures. In this work, synchrotron-based X-ray micro-diffraction is used to study the evolution of stresses in copper through-sili ...

43. Uncertainty Quantification in Materials Modeling
Topic: Materials Science
Published: 6/24/2014
Authors: Andrew M Dienstfrey, Ronald F Boisvert, Frederick R Phelan Jr., Fadil Santosa, Alejandro Strachan, Stephen Christensen
Abstract: N/A

44. Defect and Microstructural Evolution in Thermally Cycled Cu Through-Silicon Vias
Topic: Materials Science
Published: 6/14/2014
Authors: Chukwudi Azubuike Okoro, James Marro, Yaw S Obeng, Kathleen Richardson
Abstract: In this study, the effect of thermal cycling on defect generation, microstructure, and the RF signal integrity of blind Cu through-silicon via (TSV) were investigated. Three different thermal cycling profiles were used; each differentiated by their ...

45. Spray-deposition and photopolymerization of organic-inorganic thiol-ene resins for fabrication of superamphiphobic surfaces
Topic: Materials Science
Published: 6/9/2014
Authors: Li Xiong, Laken Kendrick, Hannele Heusser, Bradley J Sparks, Christopher M Stafford, James T Goetz, Sergei Nazarenko, Derek L Patton
Abstract: Superamphiphobic surfaces, exhibiting high contact angles and low contact angle hysteresis to both water and low surface tension liquids, have attracted a great deal of attention in recent years due to the importance in many practical application ...

46. Control Fusion for Safe Multi-robot Coordination
Topic: Materials Science
Published: 5/9/2014
Authors: Roger V Bostelman, Jeremy A Marvel
Abstract: Future smart manufacturing systems will include more complex coordination of mobile manipulators (e.g., robot arms mounted on mobile bases). The National Institute of Standards and Technology, Performance of Collaborative Robot Systems Project has b ...

47. Measuring Organelle Shape in 3D in Stem Cells Cultured on Nanofiber Scaffolds
Topic: Materials Science
Published: 4/19/2014
Authors: Carl George Simon Jr., Peter Bajcsy, Wojtek J Tutak, Jyotsnendu J. Giri
Abstract: Previous work has demonstrated that culture of osteoprogenitor cells on nanofiber scaffolds can potentiate osteogenic differentiation [1-4]. Culture of cells in nanofiber scaffolds causes changes to cell morphology, suggesting that morphological ...

48. Recent Advances in Focused Ion Beam Technology and Applications
Topic: Materials Science
Published: 4/11/2014
Authors: Nabil Bassim, Keana C K Scott, Lucille A Giannuzzi
Abstract: Focused ion beam (FIB) microscopes are extremely versatile and powerful instruments for materials research. These microscopes, when coupled in a system with a scanning electron microscope (SEM), offer the opportunity for novel sample imaging, secti ...

49. Measuring Stem Cell Dimensionality in Tissue Scaffolds
Topic: Materials Science
Published: 4/1/2014
Authors: Carl George Simon Jr., Sapun Parekh, Christopher K. Tison, Girish Kumar, Tanya M. Farooque, Charles H Camp
Abstract: Many 3D scaffold systems have evolved for tissue engineering, drug screening and in vitro tissue models. However, it is not clear which scaffolds provide a 3D cell niche and there is no clear way to measure cell niche dimensionality. Advances in 3D ...

Topic: Materials Science
Published: 3/7/2014
Authors: Lamuel David, Ari D Feldman, Elisabeth Mansfield, John H Lehman, Gurpreet Singh
Abstract: Carbon nanotubes and graphene are known to exhibit some exceptional thermal (K~2000 to 4400 W.m-1K-1at 300K) and optical properties. Here, we demonstrate preparation and testing of multiwalled carbon nanotubes and chemically modified graphene-composi ...

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