Analysis of the Deep Sub-Micron a-Si:H Thin Film Transistors

dc.contributor.authorFathololoumi, Saeeden
dc.date.accessioned2006-08-22T13:59:20Z
dc.date.available2006-08-22T13:59:20Z
dc.date.issued2005en
dc.date.submitted2005en
dc.description.abstractThe recent developments of high resolution flat panel imagers have prompted interests in fabricating smaller on-pixel transistors to obtain higher fill factor and faster speed. This thesis presents fabrication and modeling of short channel amorphous silicon (a-Si:H) vertical thin film transistors (VTFT). <br /><br /> A variety of a-Si:H VTFTs with different channel lengths, from 100 nm to 1 &mu;m, are successfully fabricated using the discussed processing steps. Different structural and electrical characteristics of the fabricated device are measured. The results of I-V and C-V characteristics are comprehensively discussed. The 100 nm channel length transistor performance is diverged from regular long channel TFT characteristics, as the short channel effects become dominant in the device, giving rise to necessity of having a physical model to explain such effects. <br /><br /> An above threshold model for a-Si:H VTFT current characteristics is extracted. The transport mechanisms are explained and simulated for amorphous silicon material to be used in the device model. The final model shows good agreement with experimental results. However, we used numerical simulation, run in Medici, to further verify the model validity. Simulation allows us to vary different device and material parameters in order to optimize fabrication process for VTFT. The capacitance behavior of the device is extensively studied alongside with a TFT breakdown discussion.en
dc.formatapplication/pdfen
dc.format.extent1082105 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/10012/928
dc.language.isoenen
dc.pendingfalseen
dc.publisherUniversity of Waterlooen
dc.rightsCopyright: 2005, Fathololoumi, Saeed. All rights reserved.en
dc.subjectElectrical & Computer Engineeringen
dc.subjectAmorphous siliconen
dc.subjectThin film transistoren
dc.subjectshort channel effecten
dc.titleAnalysis of the Deep Sub-Micron a-Si:H Thin Film Transistorsen
dc.typeMaster Thesisen
uws-etd.degreeMaster of Applied Scienceen
uws-etd.degree.departmentElectrical and Computer Engineeringen
uws.peerReviewStatusUnrevieweden
uws.scholarLevelGraduateen
uws.typeOfResourceTexten

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