Patent application number | Description | Published |
20090101834 | Ion beam extraction assembly in an ion implanter - The present invention relates to an ion beam extraction assembly for use in an ion beam generation apparatus such as those used, for example, in an ion implanter. An ion beam extraction assembly is provided for mounting within an ion beam generating apparatus comprising an ion source such that the extraction assembly is operable to extract ions from the ion source as an ion beam. The extraction assembly comprises an electrode assembly separate from the ion source, an electrode of the electrode assembly defining at least partly a path through the extraction assembly for passage of an ion beam. At least a part of the electrode assembly adjacent the path is tungsten and at least a part of the electrode assembly that is remote from the path is formed from a less expensive and/or lighter material. | 04-23-2009 |
20090108197 | Ion implanters - The present invention relates to components in ion implanters having surfaces, such as graphite surfaces, adjacent to the path of the ion beam through the ion implanter. Such surfaces will be prone to sputtering, and sputtered material may become entrained in the ion beam. The present invention sees the use of surfaces that are formed so as to present a series of angled faces that meet at sharp intersections. In this way, any material will be sputtered away from the ion beam. | 04-30-2009 |
20090166565 | Ion implanters - The present invention relates to components in an ion implanter that may see incidence of the ion beam, such as a beam dump or a beam stop. Such components will be prone to the ions sputtering material from their surfaces, and sputtered material may become entrained in the ion beam. This entrained material is a source of contamination. The present invention provides such components with a chamber having an elongate slot opening defined by edges, and operating the ion implanter such that a central portion of the ion beam enters the component through the opening with the edges clipping at least a peripheral portion of the ion beam. The arrangement mitigates the problem of sputtered material escaping back out from the component and becoming entrained in the ion beam. | 07-02-2009 |
20090173894 | Ion implanters - The present invention relates to components in an ion implanter that may see incidence of the ion beam, such as a beam dump or a beam stop. Such components will be prone to the ions sputtering material from their surfaces, and sputtered material may become entrained in the ion beam. This entrained material is a source of contamination. The present invention provides an ion implanter comprising power supply apparatus and an ion-receiving component. The component has an opening that receives ions from an ion beam such that ions strike an internal surface. The power supply apparatus is arranged to provide an electrical bias to the internal surface to decelerate the ions prior to their striking the surface, thereby mitigating the problem of material being sputtered from the surface. | 07-09-2009 |