A study of adhesive improvement of a Cr-Ni alloy layer on a liquid crystal polymer (LCP) surface

To improve adhesion of an alloy plating layer made from chromium (Cr) and nickel (Ni), surface modification effects produced by low pressure nitrogen (N2), oxygen (O2), or argon (Ar) gas plasmas on a liquid crystal polymer (LCP) film were analyzed with X-ray photoelectron spectroscopy (XPS). Furthermore, we focused on motion of the LCP main chains caused by macro-Brownian motion and found that reducing the glass-transition temperature of liquid crystalline by annealing further improves adhesion between the alloy plating layer and LCP.