Dual electron beam instrument for multi-perspective
US6812462B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2003 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | May 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/2815
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for imaging at multiple perspectives of a specimen are disclosed. In one embodiment, an apparatus for generating a multi-perspective image using multiple charged particle beams (e.g., electron beams) is disclosed. In one embodiment, the apparatus generally includes a charged particle beam generator system arranged to generate and control a first charged particle beam directed substantially at a first angle towards the specimen and a second charged particle beam directed substantially at a second angle towards the specimen. The apparatus also includes an image generator arranged to generate one or more images based on charged particles emitted from the specimen in response to the first and second charged particle beams and a controller arranged to cause the charged particle beam generator to direct both the first charged particle beam and the second charged particle beam at a first area of the specimen. In a specific implementation, the charged particles are in the form of electrons and the apparatus is a dual electron beam scanning electron microscope (SEM).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.