SEM Sentinel - SEM Performance Measurement System

Published

January 1, 2001

Author(s)

Bradley N. Damazo, Andras Vladar, Alice V. Ling, M A. Donmez, Michael T. Postek, Crossley E. Jayewardene

Abstract

This paper describes the design and implementation of a system for monitoring the performance of a critical dimension measurement scanning electron microscope (CD-SEM). Experiments were performed for tests involving diagnosis of the vacuum system and column stability by monitoring of the following subsystems and associated functional parameters. These include:1) Vacuum system with pressure as a function of time being recorded for the electron-optical column (gun chamber), the specimen chamber, and the sample-loading unit.2) The action of several components of the wafer handling system can be timed. 3) The electron gun emission currents and other signals to monitor the characteristics of the condenser and objective lenses may be used to correlate with image quality.4) Image sharpness, electron beam current, signal-to-noise ratio, etc. can be evaluated.

Proceedings Title

Metrology, Inspection, and Process Control for Microlithography XV, Conference |15th | Metrology, Inspection, and Process Control for Microlithography XV | SPIE

Conference Dates

February 26-March 2, 2001

Conference Title

Proceedings of SPIE--the International Society for Optical Engineering

Pub Type

Conferences

Keywords

auromatic, computer control, monitoring, performance, SEM

Citation

Damazo, B. , Vladar, A. , Ling, A. , Donmez, M. , Postek, M. and Jayewardene, C. (2001), SEM Sentinel - SEM Performance Measurement System, Metrology, Inspection, and Process Control for Microlithography XV, Conference |15th | Metrology, Inspection, and Process Control for Microlithography XV | SPIE (Accessed December 3, 2024)