Method for imaging sidewalls by atomic force microscopy
- 9 May 1994
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 64 (19), 2498-2500
- https://doi.org/10.1063/1.111578
Abstract
We demonstrate a new method for imaging vertical and near vertical surface features by atomic force microscopy (AFM). It is based on an attractive force mode AFM, equipped with a special boot‐shaped tip, coupled with a measurement of slope and with a special tracking technique. Surface profiling is achieved through a novel servo and scanning system. Mapping sidewall profile opens the door to measurement of critical dimensions (width and wall angles) of lines and trenches in integrated circuits, with high accuracy.Keywords
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