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Polymer-Based Dielectric Materials for Additive Manufacturing and Printed Electronics of Radiofrequency and Microwave Devices.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Polymer-Based Dielectric Materials for Additive Manufacturing and Printed Electronics of Radiofrequency and Microwave Devices./
作者:	Piro, Yuri.
面頁冊數:	1 online resource (226 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-12, Section: B.
Contained By:	Dissertations Abstracts International84-12B.
標題:	Chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30318002click for full text (PQDT)
ISBN:	9798379596149

Polymer-Based Dielectric Materials for Additive Manufacturing and Printed Electronics of Radiofrequency and Microwave Devices.
Piro, Yuri.

Polymer-Based Dielectric Materials for Additive Manufacturing and Printed Electronics of Radiofrequency and Microwave Devices. - 1 online resource (226 pages)

Source: Dissertations Abstracts International, Volume: 84-12, Section: B.

Thesis (Ph.D.)--University of Massachusetts Lowell, 2023.

Includes bibliographical references

This dissertation presents material development processes used to formulate printable dielectrics. The dielectric inks discussed herein have been specifically developed to solve challenges currently experienced by the printed electronics community. Two categories of dielectrics will be discussed in detail. The first category of dielectrics addresses issues which arise when integrating printed electronic devices into conventional printed circuit boards. A series of syringe dispensable nanocomposites are formulated to target this issue. Both UVA and thermally induced polymerization reactions are employed to investigate cure routines which would impart minimal stress and shrinkage, while driving thorough monomer conversion. The effect of monomer functionality on cured material modulus and thermal relaxations is studied to provide a model for altering the mechanical performance to meet application needs. Ceramic additives are investigated as a strategy to facilitate shear thinning, decrease the coefficent of thermal expansion, and modify the complex permittivity between 8-18 GHz. The materials developed for this project are used in the fabrication of printed interposers and bare die chip integration, demonstrating the utility of the developed material in rapid prototyping and printed circuit assembly. The second category of dielectric materials discussed in this dissertation was motivated by the lack of low loss dielectrics currently available for the application of additive or direct write printing techniques for the fabrication of Radio Frequency (RF) and Microwave (MW) devices. To understand the shortcomings of available dielectric materials, this investigation begins with a survey of existing dielectric formulations utilized in the printed RF and MW devices research. By studying the chemistry of the existing technologies, an empirical understanding of dielectric loss at RF frequency is developed. Using this understanding, a potential low loss monomer structure is identified, and subsequently, a novel formulation is developed leveraging modern polymerization techniques not yet used in the printed electronics ecosystem. Specifically, a robust ring opening metathesis polymerization is designed to polymerize cyclic olefin monomers when mildly heated. To widen the process window and slow the viscosity drift while printing, two approaches are investigated. The first approach uses a trialkyl phosphate inhibitor to coordinate with the catalyst's ruthenium center and lower the catalyst activity at ambient conditions. The second approach introduces an alkene sidechain, enabling an alternate reaction pathway through cross-metathesis. Both strategies are well characterized, and the complex permittivity and thermomechanical performance of each material is studied using a variety of techniques to assess material viability. It is found that the low-loss ink developed herein has an order of magnitude lower loss in the 8-18 GHz frequency regime compared to the currently available printable inks. The complex permittivity of the developed low loss dielectric material is validated using measured and simulated scattering parameter comparisons, in addition to the split post dielectric resonator measurement and the printed cylindrical capacitor characterization techniques. The dissertation concludes with the fabrication of two printed devices, grounded coplanar waveguides and a fully printed quadrature coupler, which utilize the new dielectric material. A concluding section on potential future research, outlining methods and experiments which would advance the current state-of-the-art, is included.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798379596149Subjects--Topical Terms:

516420
Chemistry.
Subjects--Index Terms:

Additive manufacturingIndex Terms--Genre/Form:

542853
Electronic books.

Polymer-Based Dielectric Materials for Additive Manufacturing and Printed Electronics of Radiofrequency and Microwave Devices.
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