Title page for ETD etd-10122005-134447

Type of Document Dissertation
Author Farzanehfard, Hosein
URN etd-10122005-134447
Title Wideband characterization of aluminum nitride substrates and high power-high frequency thick film applications
Degree PhD
Department Electrical Engineering
Advisory Committee
Advisor Name Title
Elshabini-Riad, Aicha A. Committee Chair
Johnson, Lee W. Committee Member
Rahman, Saifur Committee Member
Riad, Sedki Mohamed Committee Member
Safaai-Jazi, Ahmad Committee Member
  • Aluminum nitrate
  • Thick films
Date of Defense 1992-04-15
Availability restricted

Ceramic substrates play an important role in thick film hybrid microelectronic circuits. Existing substrates such as alumina and beryllia do not meet satisfactorily the desired requirements. The newly developed aluminum nitride (AIN) substrate shows a great deal of promise and potentially embraces the best qualities of alumina and beryllia.

The objective of this dissertation is to study the electrical properties, thick film interaction, and environmental effects on AIN substrates, and also to examine the performance of this material for high power - high frequency hybrid thick film applications. In particular, wideband dielectric constant measurements of A1N and other ceramic substrates are performed, oxidization and humidity effects on surface properties of AIN are addressed, and short and long term aging effects on several circuit parameters are studied.

To evaluate the performance of AIN in high power and high frequency applications, two circuits; an impulse generator and a power converter, are realized, tested and compared with those on alumina substrates. The thick film circuits realized on AIN perform considerably better than those on alumina.

  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
[BTD] LD5655.V856_1992.F379.pdf 7.96 Mb 00:36:51 00:18:57 00:16:34 00:08:17 00:00:42
[BTD] next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.