Modification of a Substrate Roughness for a Fabrication of Freestanding Electroplated Metallic Microstructures

  • Alongkorn Pimpin Chulalongkorn University
  • Werayut Srituravanich Chulalongkorn University
Keywords: Freestanding, metallic structure, surface roughness, Electroplating, copper, surface modification, photoresist mold.

Abstract

This study aims to demonstrate a simple fabrication technique of freestanding electroplated metallic microstructures by modifying a substrate roughness. The proposed technique utilizes counter effects between two forces, i.e. an intrinsic force causing shrinkage in an electroplated metallic microstructure, and an adhesive force adhering a metallic microstructure to a substrate. With the modification of substrate roughness until the adhesive force becomes weaker than the induced intrinsic force, electroplated metallic microstructures would spontaneously release from the substrate after the electroplating process. Three parameters, i.e. substrate roughness, electroplated square structure's area and electroplated rectangular structure's width-to-length ratio, were experimentally studied. The results showed that the electroplated structure with a smaller size and smaller width-to-length ratio was more easily detached from the substrate for a given substrate roughness. In addition, for the same electroplated structure, a substrate with less roughness allowed a detachment of electroplated microstructure more easily.

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Author Biographies

Alongkorn Pimpin

Department of Mechanical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Werayut Srituravanich

Department of Mechanical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Published In
Vol 21 No 1, Jan 31, 2017
How to Cite
[1]
A. Pimpin and W. Srituravanich, “Modification of a Substrate Roughness for a Fabrication of Freestanding Electroplated Metallic Microstructures”, Eng. J., vol. 21, no. 1, pp. 145-154, Jan. 2017.