Field Emitters with Integrated Focusing Electrode
نویسنده
چکیده
Microfabricated field emission arrays (FEA) can be used to make flat panel displays (FPD) with high brightness, large viewing angle and high luminous efficiency. However, the current implementations of field emission displays (FED) require a trade-off between luminous efficiency and display resolution, which arises because of the structural / materials limitations and the consequent danger of dielectric breakdown posed by proximity focusing. The present work addresses this problem by fabricating and testing FEA with an integrated focusing electrode as well as by analytical and numerical modeling of FEA behavior. Thesis Supervisor: Tayo Akinwande Title: Associate Professor of Electrical Engineering
منابع مشابه
Microfabricated electrospray emitter arrays with integrated extractor and accelerator electrodes for the propulsion of small spacecraft
Microfabricated electrospray thrusters could revolutionize the spacecraft industry by providing efficient propulsion capabilities to micro and nano satellites (1–100 kg). We present the modeling, design, fabrication and characterization of a new generation of devices, for the first time integrating in the fabrication process individual accelerator electrodes capable of focusing and accelerating...
متن کاملDesign and fabrication of an integrated MEMS-based colloid micropropulsion system
The design, microfabrication and initial performance results of a prototype electrospray thruster with integrated individual extractor electrodes are reported in this paper. The aim was to demonstrate increased thrust with an array of emitters spraying simultaneously. Micromachining technologies were employed to achieve large emitter density per surface area, simple integration and good structu...
متن کاملDirect Synthesis of Carbon Nanotube Field Emitters on Metal Substrate for Open-Type X-ray Source in Medical Imaging
We report the design, fabrication and characterization of a carbon nanotube enabled open-type X-ray system for medical imaging. We directly grew the carbon nanotubes used as electron emitter for electron gun on a non-polished raw metallic rectangular-rounded substrate with an area of 0.1377 cm² through a plasma enhanced chemical vapor deposition system. The stable field emission properties with...
متن کاملTailoring the hydraulic impedance of out-of-plane micromachined electrospray sources with integrated electrodes
Hydraulic impedance is a critical parameter for the operation of electrospray emitters, and for preventing flooding when spraying from arrays of emitters. Controlling flow rate by tuning the flow impedance allows accessing different operating modes, such as droplet, ionic, or pulsating. We report on a method to tailor the hydraulic impedance of micromachined capillary out-of-plane emitters with...
متن کاملCurrent-Fluctuation Mechanism of Field Emitters Using Metallic Single-Walled Carbon Nanotubes with High Crystallinity
Field emitters can be used as a cathode electrode in a cathodoluminescence device, and single-walled carbon nanotubes (SWCNTs) that are synthesized by arc discharge are expected to exhibit good field emission (FE) properties. However, a cathodoluminescence device that uses field emitters radiates rays whose intensity considerably fluctuates at a low frequency, and the radiant fluctuation is cau...
متن کامل