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Proceedings Paper

Michelson microscope interference objective for micro-structure topography measuring
Author(s): K. Hernández; R. Rodríguez-Vera; J. Rayas
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Paper Abstract

Nowadays, the trends of miniaturization of sensors and inspection devices have been of major importance in science and technology. The characterization of microchips, integrated circuits, MEMS, and micro-sensors is important to determine their proper operation. Due to their element small size may have structural fails for improper handling of them. This paper proposes the use of a Michelson interferometric objective for the determination of topographical features in materials at micro and nanoscale level. The main advantage of this method is its non-invasive nature that allows testing in soft materials without damage. The Michelson interferometric microscope objective with a magnification of 5X illuminated with a 632nm He-Ne laser is used. Fringes that allow the study of the topography of these structures are properly analyzed. The acquisition of the interferograms was performed by a CCD, which are handled by the method of phase-stepping. An integrated circuit of a CCD as target is used. A reconstruction of the microscopic topography of the sample produced results with a statistical error in the topography of 12nm. Application of this method is to conduct quality control tests in manufacture of electronic components such as micro-chips and integrated circuits.

Paper Details

Date Published: 3 November 2011
PDF: 8 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80117U (3 November 2011); doi: 10.1117/12.903319
Show Author Affiliations
K. Hernández, Univ. de Guanajuato (Mexico)
R. Rodríguez-Vera, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
J. Rayas, Ctr. de Investigaciones en Óptica, A.C. (Mexico)

Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World
Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Rufino Díaz-Uribe; Rufino Díaz-Uribe; Rufino Díaz-Uribe, Editor(s)

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