The emerging need for smart and wearable electronic systems are driving new
electronics technology paradigms in miniaturization, functionality and
cost.The operating voltages and power levels for devices in these systems
are becoming increasingly varied with increased diversity of devices to
serve these heterogeneous functions. Power convertor technologies are
incorporated into various parts of these systems to step-up or step-down
battery voltages and currents to address these diverse needs. Hence,
multiple power converters, each requiring several passive components, are
used to create stable power-supplies. This is placing significant challenges
in ultra-miniaturized and ultra-efficient power management technologies.
A typical power convertor consists of magnetic components such as inductors
perform the basic energy storage and delivery functions from the source to
the load. These power components are still at microscale in lithography and
milliscale in component size. They occupy a large volume fraction of the
power circuitry. Power convertors therefore, are a major bottleneck to
system miniaturization. There is, thus, a need for ultra-miniaturized and
high-performance power inductors for scaling down such power convertors. The
critical parameters governing the size and performance of power inductors
are its inductance density and power handling capability. These parameters
are limited by the magnetic properties of the present inductor core
materials. A new approach to inductor cores that achieves the best magnetic
properties and yet allows integration of power inductors into ultra-thin
substrates to meet the emerging needs for performance and size is therefore
required.
The objective of this research is to model, design and synthesize a novel
multilayered ferromagnetic-polymer composite structure for inductor cores
with high permeability and saturation magnetization.The multilayered
composite structure consists of thin magnetic layers interspersed with
ultra-thin polymers. A fabrication approach to integrate the composite
structure in inductor devices is also demonstrated.
| Identifer | oai:union.ndltd.org:GATECH/oai:smartech.gatech.edu:1853/54333 |
| Date | 07 January 2016 |
| Creators | Mishra, Dibyajat |
| Contributors | Tummala, Rao |
| Publisher | Georgia Institute of Technology |
| Source Sets | Georgia Tech Electronic Thesis and Dissertation Archive |
| Language | en_US |
| Detected Language | English |
| Type | Dissertation |
| Format | application/pdf |
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