Milestone-Proposal talk:Amorphous Silicon TFT Switches
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1. Peter LeComber and Walter Spear in 1979 conducted the first successful experiments that demonstrated the feasibility of using thin films of amorphous silicon in large area flat panel displays. It is cited in references a, b, c, and d as the most significant advance in flat panel technology. 2. Paul Weimer had reported in 1962 that it was possible to produce transistor action in thin film field effect devices. His paper announced the arrival of this new type of transistor which eventually became the preferred choice of switching device for flat panel displays. 3. Peter Brody and his team at Westinghouse Research reported their work on a ‘state of the art’ liquid crystal display that demonstrated that, in principle, practical-size substrates could be employed using directly addressed discrete thin film silicon transistors. 4. Howard’s 1992 paper reviews the progress achieved with thin-film transistor/liquid crystal displays. He cites the work of LeComber and Spear with the comment that ‘the report of an amorphous silicon TFT by LeComber et al in 1979 must be considered a major milestone’. 5. The paper by Hilsum in 2016 points out that the use of amorphous silicon by LeComber and Spear was entirely novel and unexpected, and followed a long sequence of unsuccessful attempts by other groups to use deposited films of other materials for fabticating the switching matrix. 6. The paper by Depp and Howard in 1993 notes that the advantage of the approach adopted by LeComber and Spear was that was cheaper than the alternatives, and therefore more commercially viable, and that the processing was simpler. 7. The review paper by Kuo in 2013 also cites the LeComber and Spear work as providing ‘the breakthrough in the field’.