Polymers for microelectronics and energy storage

dc.contributor.advisorWillson, C. G. (C. Grant), 1939-
dc.contributor.advisorLynd, Nathaniel
dc.contributor.committeeMemberBaiz, Carlos R
dc.contributor.committeeMemberManthiram, Arumugam
dc.contributor.committeeMemberRosales, Adrianne M
dc.creatorMeyer, Paul William, Ph. D.
dc.creator.orcid0000-0002-1079-0048
dc.date.accessioned2024-02-07T00:00:36Z
dc.date.available2024-02-07T00:00:36Z
dc.date.created2019-12
dc.date.issued2019-12-06
dc.date.submittedDecember 2019
dc.date.updated2024-02-07T00:00:36Z
dc.description.abstractThis dissertation focuses on two different applications of polymers for use in electronic devices. The first is pitch division photoresists, employed to improve the resolution of current photolithography tools. The second application employs the self-assembly of di-block copolymers for membrane applications, with specific focus given to separators in batteries. The microelectronics industry has continually devised new ways of printing smaller features to increase the complexity of devices and drive down cost. Although 193 nm exposure tools are common for printing the smallest of features, they are expensive, and many processes still use patterning at 254 and 365 nm wavelengths for patterns with less stringent length scales. To further improve the feature density for these processes, manufacturers oftentimes must purchase a new tool, requiring significant capital investment. At the core of this printing process is a photoresist, a photosensitive resin that changes solubility upon exposure to light. Pitch division photoresists improve the resolution of these exposure tools through chemistry. By employing a photobase generator in combination with a photoacid generator, the feature density obtained can be doubled without changing the aerial image, effectively extending the lifetime of exposure tools. This dissertation specifically focuses on pitch division at wavelengths at 254, 265, 355, and 365 nm. With increasing demand in portable electronics, there is also demand for improvements in energy storage, with lithium-ion batteries having taken over this landscape. Within this class of batteries, lithium metal anodes have been proposed to further increase the storage capabilities of these devices. However, lithium metal is very unstable, sometimes leading to catastrophic failure due to dendritic growth. Several types of solid electrolytes have been proposed in order to suppress lithium dendrite formation. Among them, polymer electrolytes have become an intensely studied class of materials, but generally exhibit a tradeoff between mechanical strength and ionic conductivity. The second part of the dissertation leverages the self-assembly of block copolymers into an isoporous gyroid morphology. One of the blocks is mechanically strong while the other is a selectively degradable polylactide. Because the pores created by the polylactide block can be filled with another electrolyte, the mechanical and ionically-conductive properties have been decoupled. The fabrication of these gyroid membranes and preliminary investigations into their application are presented.
dc.description.departmentChemical Engineering
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/2152/123598
dc.identifier.urihttps://doi.org/10.26153/tsw/50392
dc.language.isoen
dc.subjectMicroelectronics
dc.subjectBatteries
dc.subjectPhotoresist
dc.subjectSelf-assembly
dc.subjectBlock copolymers
dc.subjectSeparators
dc.subjectDual tone resist
dc.subjectLithium ion battery
dc.subjectGyroid
dc.titlePolymers for microelectronics and energy storage
dc.typeThesis
dc.type.materialtext
thesis.degree.departmentChemical Engineering
thesis.degree.disciplineChemical Engineering
thesis.degree.grantorThe University of Texas at Austin
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy

Access full-text files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
MEYER-DISSERTATION-2019.pdf
Size:
9.19 MB
Format:
Adobe Portable Document Format

License bundle

Now showing 1 - 2 of 2
No Thumbnail Available
Name:
PROQUEST_LICENSE.txt
Size:
4.45 KB
Format:
Plain Text
Description:
No Thumbnail Available
Name:
LICENSE.txt
Size:
1.84 KB
Format:
Plain Text
Description: