Abstract:
A system for inhibiting the transport of contaminant particles with an ion beam includes an electric field generator (12, 14) for generating an electric field (28) relative to a path of travel (20) for the ion beam (16). A particle (66) located in the ion beam (16) and in a region of the electric field (28) is charged to a polarity according to the ion beam (16), so that the electric field (28) may urge the charged particle (66) out of the ion beam (16).
Abstract:
A deposit cleaning system for removing deposits from interior surfaces of ion sources includes a fluorine source, a throttle mechanism, and a controller. The fluorine source supplies fluorine to the ion source as a cleaning material. The throttle mechanism mitigates loss of fluorine through a source aperture of the ion source by at least partially covering the source aperture. The controller controls the supply and flow rate from the fluorine source to the ion source and also controls the positioning of the throttle mechanism.
Abstract:
Irradiation system that comprises a beam generation source (1), a mass analysis device (3), a beam transformer, a deflector (7) for scanning which swings the beam reciprocally, a beam parallelizing device (10,29), an acceleration/deceleration device (11,12), and an energy filtering device (18), and a hybrid angular energy filter (18) generating both electric and magnetic fields to ajust trajectories is provided as the energy filtering device, along with a pair of multi-surface energy slit units (19,19') each having a plurality of energy slits that are switchable therebetween depending on an ion species for irradiation are further provided on a downstream side of the hybrid angular energy filter. It is possible to selectively irradiate a target wafer with high-current beams from low energy to high energy in the conditions where contamination such as neutral particles, different kinds of dopants, ions with different energies, metal, and dust particles is extremely small in amount.
Abstract:
In an ion source (1) for use with an ion implant device comprising: an ionization chamber (5) defined by a plurality of side walls defining an ionization volume (16), one (13) of said side walls including an ion extraction aperture (37) for enabling an ion beam to be extracted from said ionization chamber (16) along a predetermined axis defining an ion beam axis; and a gas source (2) in fluid communication with said ionization chamber (16); an electron source (12) for producing an electron beam for ionizing the gas in said ionization chamber (16); said electron source (12) has an emitter (33) external to the ionization volume (16) and one (13) of said sidewalls (13) includes an electron entrance aperture , said emitter (33) configured relative to said aperture to cause an electron beam (32) to be directed across the ionization chamber (16) and ionize said gas by direct electron impact ionization by energetic electrons
Abstract:
A deposit cleaning system for removing deposits from interior surfaces of ion sources includes a fluorine source, a throttle mechanism, and a controller. The fluorine source supplies fluorine to the ion source as a cleaning material. The throttle mechanism mitigates loss of fluorine through a source aperture of the ion source by at least partially covering the source aperture. The controller controls the supply and flow rate from the fluorine source to the ion source and also controls the positioning of the throttle mechanism.
Abstract:
The present invention relates to components in ion implanters having surfaces adjacent to the path of the ion beam through the ion implanter. Such surfaces will be prone to deposition and the present invention addresses problems associated with delamination of deposited material. An ion implanter component is provided that has a surface defining at least in part an ion beam path through the ion implanter, wherein at least a portion of the surface has been roughened. The portion of the surface may be roughened to provide surface features defined at least in part by sharp changes in orientation of adjacent parts of the surface.
Abstract:
A contamination mitigation or surface modification system for ion implantation processes includes a gas source, a controller, a valve, and a process chamber. The gas source provides delivery of a gas, be it atmospheric or reactive, to the valve and is controlled by the controller. The valve is located on or about the process chamber and controllably adjusts flow rate and/or composition of the gas to the process chamber. The process chamber holds a target device, such as a target wafer and permits interaction of the gas with an ion beam to mitigate contamination of the target wafer and/or to modify the existing properties of the processing environment or target device to change a physical or chemical state or characteristic thereof. The controller selects and adjusts composition of the gas and flow rate according to contaminants present within the ion beam, or lack thereof, as well total or partial pressure analysis.