Kim Sehyun, Lee Ki-Jun, Seo Yongsok
Supercomputational Modeling and Simulation Laboratory, Future Technology Research Division, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea.
Langmuir. 2004 Jan 6;20(1):157-63. doi: 10.1021/la035396h.
A low-energy Ar+ ion beam was used to modify the surface of a polyetheretherketone (PEEK) film. The modification reaction proceeded with or without oxygen gas injected during the irradiation. The surface functional groups of the modified PEEK were confirmed with X-ray photoelectron spectroscopy as increasing various oxygen-containing functional groups. The concentration of the functional groups varied rapidly with the irradiation time, reached a maximum value, and then slowly decreased. The surface morphology of PEEK was substantially changed by ion-beam irradiation. Surface smoothening occurred so that the surface roughness reached almost constant value after some irradiation time. The incorporation of functional groups on the PEEK surface and the surface topology change had opposite effects on the adhesion strength between PEEK and copper. Dominance of the former was evident because the lap-shear strength initially increased with the irradiation. The special surface features significantly enhanced the adhesion strength between the evaporated copper layer and the modified PEEK surface. However, the decrease in the surface roughness with a long time irradiation implies a decrease in adhesion strength due to a smaller contact area, and the shear strength due to topology change also slowly decreased after a long time irradiation.
采用低能Ar+离子束对聚醚醚酮（PEEK）薄膜表面进行改性。改性反应在辐照过程中注入或不注入氧气的情况下进行。通过X射线光电子能谱确认改性PEEK的表面官能团增加了各种含氧官能团。官能团的浓度随辐照时间迅速变化，达到最大值后缓慢下降。离子束辐照使PEEK的表面形态发生了显著变化。表面出现平滑现象，使得在经过一定辐照时间后表面粗糙度达到几乎恒定的值。PEEK表面官能团的引入和表面拓扑结构的变化对PEEK与铜之间的粘附强度有相反的影响。前者的主导作用很明显，因为搭接剪切强度最初随辐照而增加。这些特殊的表面特征显著提高了蒸发铜层与改性PEEK表面之间的粘附强度。然而，长时间辐照导致表面粗糙度降低意味着由于接触面积减小而使粘附强度降低，并且由于拓扑结构变化导致的剪切强度在长时间辐照后也会缓慢下降。
