Electron beam irradiating apparatus
US7518131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2006 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Jan 13, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L21/67005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron beam irradiating apparatus includes a chamber being kept under vacuum, and housing a planar electron emitting element and a positioning unit and an object to be irradiated is directly irradiated with an electron beam emitted from the element. The planar electron emitting element includes: an emitter portion composed of a dielectric material; and a first electrode and a second electrode applied with a driving voltage for emitting electrons, and the first electrode is formed on a first surface of the emitter portion and has a plurality of through-holes where the emitter portion is exposed, a surface of the first electrode facing to the emitter portion around the through-holes is separated from the emitter portion, and the electron beam is emitted from the first surface of the emitter portion through the through-holes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.