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Erschienen in: Microsystem Technologies 6/2017

21.05.2016 | Technical Paper

A measurement free pre-etched pattern to identify the <110> directions on Si{110} wafer

verfasst von: S. S. Singh, V. N. Avvaru, S. Veerla, A. K. Pandey, P. Pal

Erschienen in: Microsystem Technologies | Ausgabe 6/2017

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Abstract

In this paper, we present a self-aligning pre-etched pattern based technique to precisely determine the <110> direction on Si{110} wafer surface. These patterns after etching, reveals the crystallographic direction by self-aligning itself in a straight line at the <110> direction while getting self-misaligned at other directions. As a result, the exact direction can be identified by a simple visual inspection under a microscope without the need of measurement of any kind. To test the accuracy of the proposed method, we fabricated two 32 mm long channels, one oriented along the <110> direction and other along the <112> directions using the <110> direction obtained from the proposed method as the reference. The undercutting is measured at different locations on the two channels and is found to vary within a submicron range in each case. Such uniform undercutting implies that the presented technique to determine the <110> direction is accurate. This methodology is simple and can be used conveniently to fabricate MEMS structures with high dimensional accuracy.

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Metadaten
Titel
A measurement free pre-etched pattern to identify the <110> directions on Si{110} wafer
verfasst von
S. S. Singh
V. N. Avvaru
S. Veerla
A. K. Pandey
P. Pal
Publikationsdatum
21.05.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
Microsystem Technologies / Ausgabe 6/2017
Print ISSN: 0946-7076
Elektronische ISSN: 1432-1858
DOI
https://doi.org/10.1007/s00542-016-2984-2

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