Iron beam irradiation device and insulating spacer for the device
US7371991B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2005 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Nov 15, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/3151
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a structure aimed to reduce the frequency of replacement of an insulating spacer arranged between grids of an ion beam irradiation device. More specifically, disclosed is a so-called insulating spacer arranged in order to maintain insulation between the grids, the insulating spacer having an annular groove in a portion composed of an annular, substantially plane portion opposed to a grid and a cylindrical portion being raised from the central portion of the annular, substantially plane portion and abutting the grid, with the annular groove being perpendicular to the plane and separating the peripheral portion of the annular portion from the cylindrical portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.