Abstract:
A lateral-emitter field emission device has a thin-film emitter cathode 50 which has thickness of not more than several hundred angstroms and has an edge or tip 110 having a small radius of curvature. To form a novel display cell structure, a cathodoluminescent phosphor anode 60 is positioned below the plane of the thin-film lateral-emitter cathode 50, allowing a large portion of the phosphor anode's top surface to emit light in the desired direction. An anode contact layer contacts the phosphor anode 60 from below to form a buried anode contact 90 which does not interfere with light emission. The anode phosphor is precisely spaced apart from the cathode edge or tip and receives electrons emitted by field emission from the edge or tip of the lateral-emitter cathode, when a small bias voltage is applied. The device may be configured as a diode, triode, or tetrode, etc. having one or more control electrodes 140 and/or 170 positioned to allow control of current from the emitter to the phosphor anode by an electrical signal applied to the control electrode. In a particularly simple embodiment, a single control electrode 140 is positioned in a plane below the emitter edge or tip 110 and automatically aligned to that edge. The display cell structure may be repeated many times in an array, and the display cell structure of the invention lends itself to novel array structures which are also disclosed.
Abstract:
A lateral-emitter electron field-emission display device structure incorporates a thin-film emitter having an emitting edge and extending into in direct contact with a non-conducting or very high resistivity phosphor, thereby eliminating the gap between the emitter and the phosphor. Such a gap has been a part of all field-emission display devices in the prior art. The ultra-thin-film lateral emitter of the new structure is deposited in a plane parallel to the device's substrate and has an inherently small radius of curvature at its emitting edge. A fabrication process specially adapted to make the new structure includes a directional trench etch, which both defines the emitting edge and provides an opening to receive a non-conducting phosphor. This phosphor covers an anode and is automatically aligned in contact with the emitter edge. When an electrical bias voltage is applied between the emitter and anode, electrons are injected directly into the phosphor material from the emitter edge, exciting cathodoluminescence in the phosphor to emit light which is visible in a wide range of viewing angles. With minor variations in the fabrication process, a lateral-emitter electron field emission display device may be made with an extremely small emitter-phosphor gap, having a width less than 100 times the thickness of the ultra-thin emitter. Embodiments in which the gap width is zero are characterized as edge-contact light-emitting diodes (or triodes or tetrodes if they include control electrodes).
Abstract:
A microchannel plate includes a substrate defining a plurality of pores extending from a top surface of the substrate to a bottom surface of the substrate. The plurality of pores includes a resistive material on an outer surface that forms a first emissive layer. A second emissive layer is formed over the first emissive layer. The second emissive layer is chosen to achieve at least one of an increase in secondary electron emission efficiency and a decrease in gain degradation as a function of time. A top electrode is positioned on the top surface of the substrate and a bottom electrode is positioned on the bottom surface of the substrate.
Abstract:
A system and method are provided by which items in an inventory can be arranged in a storage space based upon one or more factors such as item dimensions, weight, type, sorting codes, stackability, and the like. In some cases, the system and method generate multiple inventory arrangements from which a desired inventory arrangement can be selected, such as a highly efficient inventory arrangement.
Abstract:
A storage system for use on a garage door includes at least one retaining device and at least one latching device. The retaining device is attached to one of two or more panels of a garage door and the latching device is spaced from the retaining device and is attached to one of an item to be detachably secured and the one of the two or more panels of the garage door. The latching device has at least an engaged position which detachably secures an item to the one of two or more panels of the garage door with the retaining device and a detached position which releases the item from the one of two or more panels of the garage door.
Abstract:
A method and system for injecting charge includes providing a first material on a second material and injecting charge into the first material to trap charge at an interface between the first and second materials. The thickness of the first material is greater than a penetration depth of the injected charge in the first material.
Abstract:
A power system includes a housing with a chamber, a member with a stored static electrical charge, and a pair of electrodes. The member is connected to the housing and extends at least partially across the chamber. The electrodes are connected to the housing, are spaced from and on substantially opposing sides of the member from each other, and are at least partially in alignment with each other. The member is movable with respect to the pair of electrodes or one of the pair of electrodes is movable with respect to the member.
Abstract:
A method for electrostatic bonding includes placing a first region of a first unit at least adjacent to a first region of a second unit. The first region of the first unit has trapped charge. A bond between the first region of the first unit and the first region of the second unit is formed by the electrostatic forces between the trapped charge and induced charge in the first region of the second unit. A system for electrostatic bonding includes a first unit having a first region with trapped charge and a second unit with a first region with induced charge. Electrostatic forces between the trapped charge in the first region of the first unit and the induced charge in the first region of the second unit bond the first and second units together.
Abstract:
This invention relates to methods for isolating highly purified mixtures of natural Type I interferon from white blood cells. The invention also relates to highly-purified mixtures of Type I interferon which resemble natural Type I interferon in that the highly purified mixtures of natural Type I interferon includes at least 9 subtypes, i.e., alpha-1, alpha-2, alpha-5, alpha-7, alpha-8, alpha-10, alpha-14, alpha-21 and omega, giving rise to at least 16, and possibly 20 or more molecular species, including alpha-1a, alpha-1new, alpha-2a, alpha-2b, alpha-2c, alpha-5, alpha-5LG, alpha-7, alpha-8a, alpha-8c, alpha-10a, alpha-14a, alphal4-b, alpha 14-c, alpha-14LG, alpha-21a, alpha-21b, alpha-21c, omega and omega LG.
Abstract:
A lateral-emitter field emission device has a thin-film emitter cathode 50 which has thickness of not more than several hundred angstroms and has an edge or tip 110 having a small radius of curvature. To form a novel display cell structure, a cathodoluminescent phosphor anode 60 is positioned below the plane of the thin-film lateral-emitter cathode 50, allowing a large portion of the phosphor anode's top surface to emit light in the desired direction. An anode contact layer contacts the phosphor anode 60 from below to form a buried anode contact 90 which does not interfere with light emission. The anode phosphor is precisely spaced apart from the cathode edge or tip and receives electrons emitted by field emission from the edge or tip of the lateral-emitter cathode, when a small bias voltage is applied. The device may be configured as a diode, triode, or tetrode, etc. having one or more control electrodes 140 and/or 170 positioned to allow control of current from the emitter to the phosphor anode by an electrical signal applied to the control electrode. In a particularly simple embodiment, a single control electrode 140 is positioned in a plane below the emitter edge or tip 110 and automatically aligned to that edge. The display cell structure may be repeated many times in an array, and the display cell structure of the invention lends itself to novel array structures which are also disclosed. A fabrication process is disclosed using subprocess steps S1-S19 similar to those of semiconductor integrated circuit fabrication to produce the novel display cell structures and their arrays. Various embodiments of the fabrication process allow the use of conductive or insulating substrates 20 and allow fabrication of devices having various functions and complexity.