Theses and Dissertations from UMD

Permanent URI for this communityhttp://hdl.handle.net/1903/2

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM

More information is available at Theses and Dissertations at University of Maryland Libraries.

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Author: search.filters.author.McClure, AdamSubject: search.filters.subject.high temperature

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    Investigation of Reactively Structured Al/Ni Multilayer Foils and their Applications in High Temperature Die Attach
    (2008-11-25) McClure, Adam; McCluskey, Patrick; Material Science and Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    This work focuses on using a reactive layered Al/Ni foil as a localized heat source for electronic die attachment purposes. A two pronged approach was used to demonstrate the viability of this material for attaching die to substrates using AuSn braze. Both experimental sample creation and transient thermal modeling were conducted. This thesis will report thermal simulation and experimental results as well as discussing the joining process and the results of shear strength and thermal cycling reliability testing. A new pre-heating method was developed after results revealed that the initial temperature of the system is vital in predicting how successful a joint will be. Thermal cycling results have shown that die cracking is a significant reliability issue but with further study this reactive joining process shows promise.