Abstract:
An apparatus for extending the useful life of an ion source, comprising an arc chamber containing a plurality of cathodes to be used sequentially and a plurality of repellers to protect cathodes when not in use. The arc chamber includes an arc chamber housing defining a reaction cavity, gas injection openings, a plurality of cathodes, and at least one repeller element. A method for extending the useful life of an ion source includes providing power to a first cathode of an arc chamber in an ion source, operating the first cathode, detecting a failure or degradation in performance of the first cathode, energizing a second cathode, and continuing operation of the arc chamber with the second cathode.
Abstract:
An inductively coupled plasma source for a focused charged particle beam system includes a conductive shield within the plasma chamber in order to reduce capacitative coupling to the plasma. The internal conductive shield is maintained at substantially the same potential as the plasma source by a biasing electrode or by the plasma. The internal shield allows for a wider variety of cooling methods on the exterior of the plasma chamber.
Abstract:
An inductively coupled plasma source for a focused charged particle beam system includes a dielectric liquid that insulates and cools the plasma chamber. A flow restrictor at an electrical potential that is a large fraction of the plasma potential reducing arcing because the voltage drop in the gas occurs primarily at relative high pressure.
Abstract:
Disclosed are embodiments of an ion beam sample preparation thermal management apparatus and methods for using the embodiments. The apparatus comprises an ion beam irradiating means in a vacuum chamber that may direct ions toward a sample, a shield blocking a portion of the ions directed toward the sample, and a shield retention stage with shield retention means that replaceably and removably holds the shield in a position. The shield has datum features which abut complementary datum features on the shield retention stage when the shield is held in the shield retention stage. The shield has features which enable the durable adhering of the sample to the shield for processing the sample with the ion beam. The complementary datum features on both shield and shield retention stage enable accurate and repeatable positioning of the sample in the apparatus for sample processing and reprocessing. A heat sink means is configured to conduct heat away from the sample undergoing sample preparation in the ion beam. The ion beam irradiating means may modulate ion beam intensity between at least two intensities. The shield retention stage may be stationary or rotating.
Abstract:
The invention generally provides a ground shield for use in a physical vapor deposition (PVD) chamber. In one embodiment, a ground shield includes a generally cylindrical body comprising an outer wall, an inner upper wall, an inner lower wall having a diameter less than a diameter of the inner upper wall and a reentrant feature coupling the upper and inner lower walls. The reentrant feature advantageously prevents arching between the shield and target, which promotes greater process uniformity and repeatability along with longer chamber component service life.
Abstract:
An apparatus includes a conductive structure and an insulated conductor disposed proximate an exterior portion of the conductive structure to modify an electric field about the conductive structure. The insulated conductor has an insulator with a dielectric strength greater than 75 kilovolts (kV)/inch disposed about a conductor. An ion implanter is also provided. The ion implanter includes an ion source configured to provide an ion beam, a terminal structure defining a cavity, the ion source at least partially disposed within the cavity, and an insulated conductor. The insulated conductor is disposed proximate an exterior portion of the terminal structure to modify an electric field about the terminal structure. The insulated conductor has an insulator with a dielectric strength greater than 75 kV/inch disposed about a conductor.
Abstract:
A system, method, and apparatus for mitigating contamination associated with ion implantation are provided. An ion source, end station, and mass analyzer positioned between the ion source and the end station are provided, wherein an ion beam is formed from the ion source and selectively travels through the mass analyzer to the end station, based on a position of a beam stop assembly. The beam stop assembly selectively prevents the ion beam from entering and/or exiting the mass analyzer, therein minimizing contamination associated with an unstable ion source during transition periods such as a start-up of the ion implantation system.
Abstract:
An apparatus and method for forming a carbon protective layer on a substrate using a plasma CVD method allows a more uniform in-plane distribution of the carbon protective layer thickness. The apparatus includes an annular anode that generates a plasma beam and a disk-shaped shield disposed between the anode and the substrate. The anode, the shield, and the substrate are concentrically arranged so that a straight line connecting the centers of the anode and the substrate is perpendicular to the deposition surface of the substrate where the carbon protective layer is to be formed. The center of the shield is also on the straight line.
Abstract:
The invention generally provides a ground shield for use in a physical vapor deposition (PVD) chamber. In one embodiment, a ground shield includes a generally cylindrical body comprising an outer wall, an inner upper wall, an inner lower wall having a diameter less than a diameter of the inner upper wall and a reentrant feature coupling the upper and inner lower walls. The reentrant feature advantageously prevents arching between the shield and target, which promotes greater process uniformity and repeatability along with longer chamber component service life.
Abstract:
An apparatus for investigating and/or modifying a sample with charged particles, in particular a scanning electron microscope, is provided. The apparatus comprises a beam (1, 2) of charged particles, a shielding element (10) having an opening (30) for the beam of charged particles to pass through, wherein the opening (30) is sufficiently small and the shielding element (10) sufficiently closely positioned to the surface (20) of the sample to reduce the influence of charge accumulation effects at the surface on the beam of charged particles.