Adhesion Strength Measurement of Multilayer Structures with Vertical Crack by Four Point Bending Test

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dc.contributor.advisorHan, Bongtaeen_US
dc.contributor.authorKang, Stephen Junhoen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2014-10-16T05:40:18Z
dc.date.available2014-10-16T05:40:18Z
dc.date.issued2014en_US
dc.description.abstractCurrent microelectronic packages consist of multilayer systems. Adhesion strength is one of the most important factors to the reliability of these systems. Previous studies have used four point bending tests as a method for characterizing the energy release rate to obtain the adhesion strength of bilayer systems. An extension of this work is proposed in this study, where a four point bending test of multilayer structures with a vertical crack is used to measure the adhesion strength, assisted by the presence of a predefined area. The predefined area allows for a weak adhesion horizontal accurate pre-crack which permits crack propagation under loading as well as reducing scatter within the values of critical loads. A numerical analysis is conducted to compute the energy release rate from the critical loads using the concept of the J-integral. Two sets of multilayer specimens were fabricated and tested in the study: one for investigating crack front behavior relative to the compliance change in the load-displacement profile by using transparent substrates, and the other using the previous set as a guideline for testing metal substrates under certain environmental conditions. Experimental results along with visual evidence support the consistent behavior between crack front behavior and compliance change. This correlation can be used as a baseline for testing other electronic packages for interfacial failure.en_US
dc.identifierhttps://doi.org/10.13016/M2TS4J
dc.identifier.urihttp://hdl.handle.net/1903/15921
dc.language.isoenen_US
dc.subject.pqcontrolledMechanical engineeringen_US
dc.subject.pquncontrolledadhesionen_US
dc.subject.pquncontrolledcrack fronten_US
dc.subject.pquncontrolledenergy release rateen_US
dc.subject.pquncontrolledfour point bendingen_US
dc.subject.pquncontrolledJ-integralen_US
dc.subject.pquncontrolledpredefined areaen_US
dc.titleAdhesion Strength Measurement of Multilayer Structures with Vertical Crack by Four Point Bending Testen_US
dc.typeThesisen_US

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