Modeling, design, fabrication and demonstration of multilayered ferromagnetic polymer-dielectric composites for ultra-thin high-denisty power inductors

Multilayered composite;High density inductor

Mishra, Dibyajat ; Tummala, Rao Materials Science and Engineering Gerhardt, Rosario Garmestani, Hamid Pulugurtha, Raj Shipton, Erik ; Tummala, Rao

University:Georgia Institute of Technology

Department:Materials Science and Engineering

关键词: Multilayered composite;    High density inductor;   

Others  :  https://smartech.gatech.edu/bitstream/1853/54333/1/MISHRA-DISSERTATION-2015.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

The emerging need for smart and wearable electronic systems are driving newelectronics technology paradigms in miniaturization, functionality andcost.The operating voltages and power levels for devices in these systemsare becoming increasingly varied with increased diversity of devices toserve these heterogeneous functions. Power convertor technologies areincorporated into various parts of these systems to step-up or step-downbattery voltages and currents to address these diverse needs. Hence,multiple power converters, each requiring several passive components, areused to create stable power-supplies. This is placing significant challengesin ultra-miniaturized and ultra-efficient power management technologies.A typical power convertor consists of magnetic components such as inductorsperform the basic energy storage and delivery functions from the source tothe load. These power components are still at microscale in lithography andmilliscale in component size. They occupy a large volume fraction of thepower circuitry. Power convertors therefore, are a major bottleneck tosystem miniaturization. There is, thus, a need for ultra-miniaturized andhigh-performance power inductors for scaling down such power convertors. Thecritical parameters governing the size and performance of power inductorsare its inductance density and power handling capability. These parametersare limited by the magnetic properties of the present inductor corematerials. A new approach to inductor cores that achieves the best magneticproperties and yet allows integration of power inductors into ultra-thinsubstrates to meet the emerging needs for performance and size is thereforerequired.The objective of this research is to model, design and synthesize a novelmultilayered ferromagnetic-polymer composite structure for inductor coreswith high permeability and saturation magnetization.The multilayeredcomposite structure consistsof thin magnetic layers interspersed withultra-thin polymers. A fabrication approach to integrate the compositestructure in inductor devices is also demonstrated.