Surface Treatment of Plastic Substrates using Atomic Hydrogen Generated on Heated Tungsten Wire at Low Temperatures

Abstract

The surface properties of a plastic substrate were changed by a novel surface treatment called atomic hydrogen annealing (AHA). In this method, a plastic substrate was exposed to atomic hydrogen generated by cracking hydrogen molecules on heated tungsten wire. For the substrate, surface roughness was increased and halogen elements (F and Cl) were selectively etched by AHA. AHA was useful for pretreatment before film deposition on a plastic substrate because the changes in surface state relate to adhesion improvement. It is concluded that this method is a promising technique for preparing highperformance plastic substrates at low temperatures.

Bulk-Phase Pentacene Film Prepared by Heated Tungsten Mesh

“…The pentaceneˆlm prepared at T mesh of 1200°C showed a meshlike texture. This implies that the surface was modiˆed by etching and the recombination reaction energy of the atomic hydrogen 22,23) on the growth surface of the pentaceneˆlm, and a unique structure, such as the meshlike texture, was formed at T mesh of 1200°C. This phenomenon is under consideration.…”

“…Moreover, I B /I T for theˆlm prepared at T mesh of 1200°C was very high in comparison with that for theˆlm prepared at T mesh of 1000°C. One of the reasons for this is the enhancement of the transition from the TFP to the BP by the eŠects of etching and the recombination reaction energy 22,23) of atomic hydrogen in the growth of a pentaceneˆlm. In general, when the free energy of the growth surface is low, a BP appears because pentacenê lms can grow without interacting with the substrate.…”

Protrusion Formation of Polymer Surface by Atomic Hydrogen Annealing

“…Atomic hydrogens, in other words, hydrogen radicals, are generated by catalytic cracking reaction on a heated catalyst [1,2]. We proposed a surface treatment method using the atomic hydrogen, named as the atomic hydrogen annealing (AHA) [3][4][5][6][7][8][9][10][11]. In AHA, the hydrogen molecules are decomposed by the catalytic cracking reactions on the heated tungsten (W) catalyst placed near the sample.…”

Removal of Surface Contamination by Atomic Hydrogen Annealing

“…We proposed the surface treatment method using the atomic hydrogen, named as the atomic hydrogen annealing (AHA) [2][3][4][5][6][7][8]. In AHA, the hydrogen molecules are decomposed by the catalytic cracking reactions on the heated tungsten (W) catalyst placed near the sample.…”