Scanning electron microscope
US6646262B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2002 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Jul 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A scanning electron microscope with an energy filter which can positively utilize secondary electrons and/or reflected electrons which collide against a mesh electrode and are lost. The scanning electron microscope which has a porous electrode for producing an electric field for energy-filtering electrons produced by applying a primary electron beam to a sample and a 1st electron detector which detects electrons passing through the porous electrode is characterized by further having a porous structure provided near the sample, a deflector which deflects electrons from the axis of the primary electron beam, and a 2nd electron detector which detects the electrons deflected by the deflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.