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Enhanced electron beam addressed storage target

  • US 5,557,177 A
  • Filed: 01/18/1994
  • Issued: 09/17/1996
  • Est. Priority Date: 01/18/1994
  • Status: Expired due to Fees
First Claim
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1. A row addressed field emitter array electronic charge storage target device comprising:

  • a vacuum environment,base electrode means,a plurality of non overlapping row electrodes generally extending along a first direction,each said row electrode overlaps said base electrode means,row decoder means to apply a current control voltage between a select one of said row electrodes and said base electrode means,a respective electron emitting means operatively associated with each said row electrode and said base electrode means for emitting in said vacuum environment a plurality of electrons dependent upon said current control voltage applied between the row electrode and said base electrode means by a field emission phenomena,target means comprising;

    a substrate,a plurality of reflective conductor means arranged into a matrix of p rows and q columns,support means to separate each said reflective conductor means from said substrate,said reflective conductor means in each column q are electrically connected,electron collector means,potential control means to apply between each said column q of electrically connected reflective conductor means and said collector means a respective potential difference,control means to synchronize application of said respective potential differences with application of said current control voltage between each one of said row electrodes and said base electrode means,acceleration means to enable said electrons emitted from any one of said respective emitting means to be accelerated toward said target means,focusing means to cause said electrons accelerated by said acceleration means to strike said target means at a respective emitting means image,equilibrium writing means enabling said respective potential difference applied between any one of said columns q of electrically connected reflective conductor means and said collector means to influence an electronic charge quantity accumulated by a respective pixel element formed where at least one of said reflective conductor means in the column q overlaps said emitting means image of where said focusing means has caused said accelerated electrons to strike said target means,each column q of electrically connected reflective conductor means overlaps each said respective emitting means image enabling said electronic charge quantity accumulated by said pixel elements formed with each said emitting means image to be collectively accumulated during a respective line period duration thereby providing compensation for variations in the number of said electrons striking said target means at each said emitting means image,said electronic charge quantity accumulated by each said pixel element influences separation between said substrate and said reflective conductor means forming said pixel element.

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