Commissariat a L'energie Atomique

Pierre Nicolas

Yohan Desieres

Denis Sarrasin

Jean Dijon

Serge Gidon

Philippe Pantigny

Jean-Luc Martin

Charlotte Gillot

Jacques Cluzel

An electronic emission device including plural electron beams including a first structure having a plurality of emission sources of electron beam, hybridized with a second structure including a plurality of diaphragm openings.

Hybrid multibeam electronic emission device with controlled divergence

An electronic emission device emitting plural beams of electrons and including a first structure of a plurality of electron beam emission micro-sources, and a second structure opposite the first structure for collecting electrons emitted by the first structure and for carrying out a secondary emission following the collection. The device can be applied in particular to the field of direct writing lithography.

Microelectronic multiple electron beam emitting device

This invention relates to a triode type cathode structure comprising a cathode conductor (), an electrical insulation layer () and a grid electrode (), superposed on a support (), the electrical insulation layer and the grid electrode comprising openings exposing at least one electron emitting element, electrically connected to the cathode conductor () and comprising nanotubes () made of an electron emitting material. The cathode structure comprises protective means preventing the longest nanotubes from coming into contact with the grid electrode ().

Cathode structure with nanotubes for emissive screen

Process and device for control of an electron source with matrix structure, regulated by the emitted charge. The invention is applicable to an electron source comprising addressing rows and columns which intersect to define emission areas, the electrons being supplied by the columns. According to this invention, the emission of electrons is triggered by increasing the potential of the columns to a value that will enable preferential emission of unaddressed rows. Then, throughout the emission duration, the potential of columns will be kept equal to this value, while simultaneously making measurements in the columns of the quantity of charges emitted by the pixels in the said columns. Secondly, when the quantity of charges measured on a column reaches a required charge quantity, the potential of this column is switched to a value that will block the emission of electrons. The invention is particularly applicable to flat field emission displays.

Method and device for controlling a matrix electron source, with regulation by the emitted charge

A flat thermionic emission screen () has a first substrate () on which are arranged an emission cathode () and an electron extraction grid (), a second substrate () facing the first substrate () on which is arranged an anode () designed to collect the electrons emitted by the cathode (), and an electronic control circuit of the anode () voltage having at least one commutation component (). The commutation component () is built into the first substrate () and in the second substrate () of the screen ().

Flat thermionic emission screen and with integrated anode control device

A method controls voltage of a matrix structure electron source. The method includes setting the emission of electrons by applying potentials on the selected line and column(s) at a value allowing this emission, maintaining these potentials at their value throughout the duration of the emission, carrying out a sampling and analog memorisation of the emission current of each pixel of the column(s) at the start of the emission time, and using another current supplied by a current generator that is proportional to the value of the measured emission current circulating the column(s); and measuring the quantity of charge delivered, during all or part of the remaining line time, by each current generator, and when this quantity reaches a required value, commuting the potential of the column associated to the current generator to a value that ensures the blocking of the emission of electrons of the pixel of this column.

Method and device for controlling the voltage of a matrix structure electron source, with regulation of the emitted charge

Reading device for an array of radiation detectors arranged as a mosaic of detectors and having a plurality of capacitors (222), each connected to a reading circuit (224, 225). According to the invention, each capacitor (222) is associated with a subarray of several detectors of the mosaic, the reading device also having a plurality of controllable switches (231, 232, 233, 224) for successively connecting each detector of each subarray respectively to the associated integrating capacitor (222) and the reading device having means (226) for controlling the closing and opening of the switches in an order excluding the simultaneous reading of the signal of closer neighbouring detectors.

Reading device for a mosaic of electromagnetic detectors and detection

It comprises information photodetection means (2), which have N photodetectors (6), each photodetector being able to supply a current having an information-carrying component and a non-information carrying component, N being an integer at least equal to 1, reading means (4) for the thus detected information and which use for this purpose the current supplied by each photodetector, and N other regulatable means (22) respectively associated with the N photodetectors each other regulatable means being able to extract a regulatable intensity current from the current supplied by the associated photodetector prior to the use of said latter current by the reading means.

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Saint Egreve, France

Pierre Nicolas