Title page for ETD etd-6798-14833

Type of Document Master's Thesis
Author Webster, James R
Author's Email Address jwebst@vt.edu
URN etd-6798-14833
Title Thin Film Polymer Dielectrics for High-Voltage Applications under Severe Environments
Degree Master of Science
Department Electrical Engineering
Advisory Committee
Advisor Name Title
Elshabini-Riad, Aicha A. Committee Chair
Desu, Seshu B. Committee Member
Garrou, Philip E. Committee Member
McGrath, James E. Committee Member
Murphy, Kent A. Committee Member
  • Polymer
  • Dielectric
  • Electronics
  • Packaging
Date of Defense 1998-05-26
Availability unrestricted
This thesis presents the results of research into the performance of advanced polymer

dielectrics for the realization of high-power electronic circuits in a miniature form. These

polymeric materials must satisfy a number of critical thermal, environmental, and

electrical requirements to meet the required performance criteria for microelectronics

applications. These desired attributes include thermal stability, low moisture uptake, high

breakdown voltage (low leakage current), low dielectric constant, low loss tangent, high

glass transition temperature, and low surface roughness. The use of these polymers

allows for advanced electronic packaging techniques, resulting in improved system

performance and reliability.

Research was performed using a commercially available polymer dielectric and evaluated

the feasibility of utilizing these materials as interlayer dielectrics in multilayer power

electronic circuits. Historically, efforts to develop advanced interlayer dielectric

materials have concentrated on promoting their use in high speed digital circuits.

However, dielectrics used in power electronics must meet requirements not commonly

stressed in designs for digital circuits. Multilayer circuits used in power electronics place

a particular emphasis on the material properties of high dielectric strength or breakdown

voltage and small values for loss tangent or dissipation factor. The focus of this research

has been to characterize these particular properties for a commercially available polymer


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