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dc.contributor.authorSingh, Hitendra Kumaren
dc.date.accessioned2014-03-14T20:30:51Zen
dc.date.available2014-03-14T20:30:51Zen
dc.date.issued2004-08-23en
dc.identifier.otheretd-01172005-135123en
dc.identifier.urihttp://hdl.handle.net/10919/30973en
dc.description.abstractFracture mechanics is an effective approach for characterizing material resistance to interfacial failure and for making interface reliability predictions. Because interfacial bond integrity is a major concern for performance and reliability, the need to evaluate the fracture and delamination resistance of an interface under different environmental conditions is very important. This study investigates the effects of temperature, solution chemistry and environmental preconditioning, in several solutions on the durability of silicon/epoxy and glass/epoxy systems. A series of experiments was conducted using wedge test specimens to investigate the adhesion performance of the systems subjected to a range of environmental conditions. Both silicon and glass systems were relatively insensitive to temperature over a range of 22-60°C, but strongly accelerated by temperatures above 60°C, depending on the environmental chemistry and nature of the adhesive system used. Silicon/commercial epoxy specimens were subjected to preconditioning in deionized (DI) water and more aggressive solution mixtures prior to wedge insertion to study the effect of prior environmental exposure time on the system. The wedge test data from preconditioned specimens were compared with standard wedge test results and the system was insensitive to preconditioning in DI water but was affected significantly by preconditioning in aggressive environments. Plots describing - G (crack velocity versus applied strain energy release rate) characteristics for a particular set of environmental conditions are presented and a comparison is made for different environmental conditions to quantify the subcritical debonding behavior of systems studied. A kinetic model to characterize subcritical debonding of adhesives for microelectronic applications is also proposed based on molecular interactions between epoxy and a silane coupling agent at the interface and linear elastic fracture mechanics, which could help predict long-term deterioration of interfacial adhesion.en
dc.publisherVirginia Techen
dc.relation.haspartThesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectGlass-epoxy interfaceen
dc.subjectWedge testen
dc.subjectSubcritical crack growthen
dc.subjectDiffusionen
dc.subjectTemperatureen
dc.subjectFracture mechanicsen
dc.subjectDelaminationen
dc.subjectAdhesionen
dc.subjectSilicon-epoxy interfaceen
dc.subjectInterfacial fracture energyen
dc.titleDetermining Interfacial Adhesion Performance and Reliability for Microelectronics Applications Using a Wedge Test Methoden
dc.typeThesisen
dc.contributor.departmentEngineering Science and Mechanicsen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineEngineering Science and Mechanicsen
dc.contributor.committeechairDillard, David A.en
dc.contributor.committeememberDillard, John G.en
dc.contributor.committeememberCase, Scott W.en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01172005-135123/en
dc.date.sdate2005-01-17en
dc.date.rdate2008-01-18en
dc.date.adate2005-01-18en


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