Apparatus for evaluating degradation of pattern features
US8401273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2010 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Jun 13, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30148
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A measurement tool apparatus for evaluating degradation of pattern features in a semiconductor device manufacturing process. The measurement tool apparatus detects variations in the patterns from SEM images thereof and extracts pattern edge points along the circumference of each pattern. The measurement tool apparatus compares the pattern edge points to corresponding edge points of an ideal shape so as to determine deviation of the patterns. Metrics are derived from analysis of the deviations. The measurement tool apparatus uses the metrics in calculating an index representative of the geometry of edge spokes of the pattern, an indicator of the orientation of the edge spokes, and/or anticipated effects of the edge spokes on device performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.