Abstract:
A getter assembly for use in a vacuum display panel is described. The novel getter assembly can be provided including both a non-evaporative getter and an evaporative getter which are uniquely positioned juxtaposed to each other such that ions emitted by the evaporative getter upon activation substantially shield the non-evaporative getter so that gases emitted by the non-evaporative getter when activated does not affect the state of vacuum in the vacuum display panel. A preferred embodiment of the present invention novel getter assembly is shown for vacuum display panels that have sufficient thickness in the cavity so that the getter assembly can be installed inside the cavity. An alternate embodiment of the present invention illustrates that when the cavity in the vacuum display panel is too small to accommodate the mounting of the getter assembly, an exterior mounting of the assembly is possible wherein one of the getters may be activated by a radio frequency induced current, instead of by feedthrough electrodes. By utilizing the present invention novel getter assembly which is uniquely positioned to compliment each other's functions, a high and stable vacuum state in a vacuum display panel device can be achieved and maintained, for instance, at between 10−6 and 10−7 Torr.
Abstract:
A getter system for purifying the gaseous atmosphere within a confinement volume of a process chamber is disclosed. In a process chamber provided with at least one screen that defines a confinement volume, the getter system includes at least one substantially planar getter device disposed within the confinement volume such that the at least one getter device is substantially parallel to and spaced apart from the at least one screen. The at least one getter device has an inner surface facing the at least one screen and an outer surface facing the confinement volume, with at least the inner surface being formed of getter material. The at least one getter device is spaced apart from the at least one screen such that the inner surface and the at least one screen define an inner space that is in gas flow communication with the confinement volume.
Abstract:
A getter pump with high gas sorption velocity includes a cylindrical housing that has an open end and a closed end and defines a chamber with a central axis. Three to eight getter structures are disposed within the chamber. The getter structures are symmetrically arranged around the central axis of the chamber and are substantially parallel to the central axis of the chamber. Each of the getter structures includes a plurality of porous disks of getter material disposed on a central shaft. A heater is centrally disposed within the chamber such that the heater is substantially coaxial with the central axis of the chamber.
Abstract:
A getter device capable of being re-activated as required and arranged in a narrow space in an envelope. The getter is arranged in a layer-like manner in an envelope of an electronic element to provide, in the envelope, a film-like getter for keeping an interior of the envelope at a vacuum. Electrons emitted from an electron feed section are impinged on the getter to activate it. The getter activated adsorbs thereon gas in an envelope of an image display device.
Abstract:
A porous light-weight getter which collects particulate and molecular contaminates that is believed a significant improvement over the prior art is provided in which a metal mesh matrix is coated with a low-density porous aerogel. In the prior art bare metal mesh matrices have been employed as getters, which are subject to ablation from high-velocity contaminant particles. In the composite getter of the present invention, the low-density aerogel coating protects the enclosed metal matrix from ablation and also can attract and hold the incoming high-velocity particle. On its part, the metal mesh provides reinforcing support to the aerogel covering and also good thermal conductivity therein so that such covering can be cooled to the low temperatures that attract such contaminants. The invention further provides method for manufacture of the composite getters of the invention. Such composite getters are useful in decontamination in semiconductor manufacturing processes and storage thereof and in decontaminating optical systems including a space-based telescope.In other embodiments, the getter of the invention can be mounted in air ducts to serve as a filter therefor, can be mounted in a photocopier for capture of toner fog, can be mounted in areas of semiconductor manufacturing for collecting contaminates proximate thereto, can be mounted in operating rooms, cleanrooms, in storage areas for surgical instruments, in spacecraft and the like for decontamination thereof.
Abstract:
A porous light-weight getter which collects particulate and molecular contaminates that is believed a significant improvement over the prior art is provided in which a metal mesh matrix is coated with a low-density porous aerogel. In the prior art bare metal mesh matrices have been employed as getters, which are subject to ablation from high-velocity contaminant particles. In the composite getter of the present invention, the low-density aerogel coating protects the enclosed metal matrix from ablation and also can attract and hold the incoming high-velocity particle. On its part, the metal mesh provides reinforcing support to the aerogel covering and also good thermal conductivity therein so that such covering can be cooled to the low temperatures that attract such contaminants. The invention further provides method for manufacture of the composite getters of the invention. Such composite getters are useful in decontamination in semiconductor manufacturing processes and storage thereof and in decontaminating optical systems including a space-based telescope. In other embodiments, the getter of the invention can be mounted in air ducts to serve as a filter therefor, can be mounted in a photocopier for capture of toner fog, can be mounted in areas of semiconductor manufacturing for collecting contaminates proximate thereto, can be mounted in operating rooms, cleanrooms, in storage areas for surgical instruments, in spacecraft and the like for decontamination thereof.
Abstract:
A method for checking the evaporation of a pellet of getter material such as barium on the walls of the envelope of a cathode-ray tube during manufacture. The pressure within the cathode-ray tube is measured during the operation involving stabilization of the cathode material by measuring the positive-ion charge within the tube.
Abstract:
A getter sorption pump has at least one getter member of non-evaporating getter material and a corresponding heating element. The specific performance of the getter pump is increased along with a simultaneous reduction of necessary heating capacity, and it is stabilized over a long time period by use of a heat accumulator having an extremely high heat storing capability. For this purpose, the heating element is attached to a sintered ceramic body, and an insulating tube onto which the getter member is sintered, in situated thereabove. The getter pump is employed in high-vacuum and gas discharge systems.