Load lock system for charged particle beam imaging
US10643818B2 · kind B2 · utility
0Cited by
9References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2019 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Jan 7, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L21/67766
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A load lock system for charged particle beam imaging with a particle shielding plate, a bottom seal plate and a plurality of sensor units is provided. The sensor units are located above the wafer, the shield plate is designed to have a few number of screws, and the bottom seal plate contains no cable, no contact sensors and fewer screws used. In the invention, the system is designed to improve the contamination particles from components in the load lock system of charged particle beam inspection tool and also to simplify its assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.