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Fabrication of arrays of nanometer size test structures for scanning probe microscope tips characterization
Department of Physics, Chalmers University of Technology.ORCID iD: 0000-0001-7329-3359
1994 (English)In: Journal of Vacuum Science & Technology B, ISSN 1071-1023, E-ISSN 1520-8567, Vol. 12, no 6, p. 3681-3684Article in journal (Refereed) Published
Abstract [en]

A problem in scanning probe microscopy (SPM) is the unknown shape of the probing tip. Generally, the image is a convolution between the shape of the tip and the surface. Information of the shape of the probe may be gained by imaging very sharp tips. Here we present a method for making two-dimensional arrays of very sharp tips. The tip arrays were made of silicon using electron beam lithography with subsequent ion-beam etching. To achieve the best possible resolution, ultrasonic excitation was used during development of the bilayered PMMA resist. Thus, openings in the resist with size nearly equal to the spot size of the writing e-beam have been obtained. A further decrease of the radius of the tips was obtained by the choice of appropriate thickness for the masking NiCr layer. The tips were conical with a height up to 100 nm with a radius of the tip down to 10 nm. The tips were suitable for study of the shape of AFM probe tips, under condition that the tip array samples were rinsed in water prior to the measurement. Without the rinsing procedure, strong sticking forces between the probe and the sample would have eroded both of them. The regularity of the array provided an easy way to calibrate the lateral motion of the scanner.

 

Place, publisher, year, edition, pages
1994. Vol. 12, no 6, p. 3681-3684
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:miun:diva-9851DOI: 10.1116/1.587639OAI: oai:DiVA.org:miun-9851DiVA, id: diva2:236670
Note
38th International Symposium on Electron, Ion and Photon Beams, NEWORLEANS, LA, MAY 31-JUN 03, 1994Available from: 2009-09-24 Created: 2009-09-24 Last updated: 2017-12-13Bibliographically approved

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Olin, Håkan

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