Evaluation of the adhesion on the nano-scaled polymeric film systems

Tae Sung Park; Ik Keun Park; Sanichiro Yoshida

doi:10.1016/j.ultras.2016.12.019

Evaluation of the adhesion on the nano-scaled polymeric film systems

Ultrasonics. 2017 Apr:76:166-176. doi: 10.1016/j.ultras.2016.12.019. Epub 2016 Dec 31.

Authors

Tae Sung Park¹, Ik Keun Park², Sanichiro Yoshida³

Affiliations

¹ Seoul National University of Science and Technology, Seoul, Republic of Korea.
² Seoul National University of Science and Technology, Seoul, Republic of Korea. Electronic address: ikpark@seoultech.ac.kr.
³ Southeastern Louisiana University, Hammond, USA.

PMID: 28103485
DOI: 10.1016/j.ultras.2016.12.019

Abstract

We applied scanning acoustic microscopy known as the V(z) curve technique to photoresist thin-film systems for the evaluation of the adhesive strength at the film-substrate interface. Through the measurement of the SAW (Surface Acoustic Wave) velocity, the V(z) curve analysis allows us to quantify the stiffness of the film-substrate interface. In addition, we conducted a nano-scratch test to quantify the ultimate strength of the adhesion through the evaluation of the critical load. To vary the adhesive conditions, we prepared thin-film specimens with three different types of pre-coating surface treatments, i.e., oxygen-plasma bombardment, HMDS (Hexametyldisilazane) treatment and untreated. The magnitudes of the quantified stiffness and ultimate strength are found consistent with each other for all the specimens tested, indicating that the pre-coating surface treatment can strengthen both the stiffness and ultimate strength of the adhesion. The results of this study demonstrate the usefulness of the V(Z) analysis as a nondestructive method to evaluate the adhesion strength of nano-structured thin-film systems.

Keywords: Adhesion; Nano-scratch test; Polymeric film; Scanning Acoustic Microscopy (SAM); Surface acoustic wave.

Publication types

Research Support, Non-U.S. Gov't