Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung einer mikromechanischen Teilchenstrahlquelle, welche wenigstens eine Feldemitterspitze zur Abstrahlung von Teilchen aufweist, wobei das Verfahren die folgenden Schritte aufweist: Aufbringen mindestens einer Oberflächenlage aus einem elektrisch halbleitenden oder leitenden Material auf die Oberfläche (2) eines Substrates (1); Strukturieren der mindestens einen auf das Substrat (1) aufgebrachten Oberflächenlage dergestalt, dass eine möglichst schmale Bahn von geringer Höhe gefertigt wird; teilweises Abtragen von zwischen den Bahnen liegenden, freiliegenden Bereichen der elektrisch isolierenden Substratoberfläche dergestalt, dass die Bedeckung der Bereiche der neu entstandenen elektrisch isolierenden Substratoberfläche durch die darüber liegenden Oberflächenlagen (3, 4) verhindert wird; Aufbringen einer weiteren leitfähigen Lage (6) auf die so entstandene Oberfläche; und Aufbringen der Feldemitterspitze auf die schmale Bahn und hierbei exakte Positionierung der Feldemitterspitze (8) mit einer Genauigkeit von wenigen nm im Zentrum der optischen Achse der mikromechanischen Teilchenstrahlquelle.
Abstract:
A mechanically stable and oriented scanning probe tip comprising a carbon nanotube having a base with a gradually decreasing diameter, with a sharp tip at the probe tip. Such a tip or an array of tips is produced by depositing a catalyst metal film on a substrate, depositing a carbon dot on the catalyst metal film, etching away the catalyst metal film not masked by the carbon dot, removing the carbon dot from the catalyst metal film to expose the catalyst metal film and growing a carbon nanotube probe tip on the catalyst metal film. The carbon probe tips can be straight, angled, or sharply bent and have various technical applications.
Abstract:
There is disclosed an improved field emission device (30) which finds use in display devices, such as a flat panel displays. Known devices and displays suffer from problems such as complexity of fabrication and limited colour gamut. The device (30) therefore provides a field emission backplate (38) which is made from a substantially semiconductor based material and comprises a plurality of grown tips (32), the device (30) further comprising at least one electro-luminescent and/or photo-luminescent material (34) having a fluorescent material chemically attached thereto, i.e. a fluorescent dye doped material.
Abstract:
There is disclosed an improved field emission device (30) which finds use in display devices, such as a flat panel displays. Known devices and displays suffer from problems such as complexity of fabrication and limited colour gamut. The device (30) therefore provides a field emission backplate (38) which is made from a substantially semiconductor based material and comprises a plurality of grown tips (32), the device (30) further comprising at least one electro-luminescent and/or photo-luminescent material (34) having a fluorescent material chemically attached thereto, i.e. a fluorescent dye doped material.
Abstract:
An emitter has a basic unit with at least one emission surface. Accordingly, the basic unit has deep structuring in a region of the at least one emission surface. More specifically, the basic unit has the deep structuring on both a front side and on a rear side in the region of the emission surface for improving emission properties.
Abstract:
A field emission device includes a substrate and a plurality of wires embedded in the substrate. The plurality of wires has at least a field emitter cathode wire; a control grid wire array; and a collector anode array. The field emitter cathode wire, control grid wire array, and collector anode array are embedded in and extend through a nonconductive substrate matrix. A method for making a vacuum field emission device is also disclosed.
Abstract:
A mechanically stable and oriented scanning probe tip comprising a carbon nanotube having a base with gradually decreasing diameter, with a sharp tip at the probe tip. Such a tip or an array of tips is produced by depositing a catalyst metal film on a substrate (10 & 12 in FIG. 1(a)), depositing a carbon dot (14 in FIG. 1(b)) on the catalyst metal film, etching away the catalyst metal film (FIG. 1(c)) not masked by the carbon dot, removing the carbon dot from the catalyst metal film to expose the catalyst metal film (FIG. 1(d)), and growing a carbon nanotube probe tip on the catalyst film (16 in FIG. 1(e)). The carbon probe tips can be straight, angled, or sharply bent and have various technical applications.
Abstract:
A field emission device having improved properties and which finds use in display devices, such as a flat panel displays. Known devices and displays suffer from problems such as complexity of fabrication and limited color gamut. The present device provides a field emission backplate which is made from a substantially semiconductor based material and has a plurality of grown tips. The device also includes at least one electro-luminescent or photo-luminescent material having a fluorescent material such as a fluorescent dye doped material chemically attached thereto.
Abstract:
A solid state sub-nanometer-scale electron beam emitter comprising a multi-layered structure having a nano-tip electron emitter and tunnel emission junction formed on substrate, an initial electron beam extraction electrode, a “nano-sandwich Einzel” electrode, and a topmost protective layer.
Abstract:
A field emission device (1) may be used for emitting electrons in, for example, a field emission display (FED). Field emission tips (40) are used for the emitting of electrons in the field emission device (1). In operation of the field emission device (1) a voltage is applied between a first electrode (4) having electrical contact with the field emission tip (40) and a second electrode (34) to make the field emission tip (40) emit electrons. To form a field emission tip (40) a layer of liquid material is applied on a substrate (2) provided with the first electrode (4). The layer of liquid material is embossed with a patterned stamp and subsequently cured to form a field emission tip structure (20). A conductive film (38) is applied on the field emission tip structure (20) to form a field emission tip (40) that has electrical contact with the first electrode (4).