Papers by Keyword: Fluorocarbon

Abstract: The poor corrosion resistance of magnesium alloys become the bottleneck restricting its development. Based on micro-arc oxidation (MAO) technology and the characteristics of fluorocarbon coating the surface of magnesium alloy build a high corrosion protection system, namely: Based on micro-arc oxidation coating fluorocarbon coatings. The formation of the composite coating through the resistance to ageing test through the resistance to ageing test, acid and alkali experiment and salt spray test results show the excellent corrosion resistance performance. Among them, the resistance to salt spray test time can reach 1500 h, which breaks the bottleneck of magnesium alloy corrosion resistance of 1000 h.

Abstract: In this article, preparation approach of a novel fluorocarbon nano material was described. The molecule structure, thermal properties and morphology characterization of the fluorocarbon nano material were studied out by Fourier transform infrared spectroscopy (FTIR), thermal gravity and differential thermal analysis (TG-DTA), transmission electron microscope (TEM) and X-ray diffraction analysis (XRD). It was showed that the basic molecule structure of the fluorocarbon nano material was same as the raw material (FKM) except that a new C=C bond was produced in the fluorocarbon nano material at 1624cm^-1. It was demonstrated that the morphology of the fluorocarbon nano material was unattached particles with particle size between 40-60nm under TEM. From TG-DTA curves, it was indicated that the fluorocarbon nano material was high thermal stabile, which oxidizing decomposing temperature in air and thermal decomposing temperature in N₂ were 322°C and 295°C, respectively. The XRD pattern showed that the diffraction peak of amorphous carbon was disappeared when the fluoronano material was baked in air at 350°C, and this result validates the oxidizing decomposing of the fluorocarbon nano material at 322°C of the TG-DTA curve.

Abstract: Versatate-fluorocarbon emulsion with core-shell structure was synthesized by seeded emulsion polymerization using versatate, organic fluorine and acrylate as raw materials. The influences of amount of organic fluorine and versatate, core-shell ratio on the properties of emulsion were discussed. The emulsion was characterized with contact angle analyzer, particle size, transmission electron microscopy (TEM), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The results showed that the emulsion had good properties while w(organic fluorine)=6%, w(versatate)=8%, soft core-hard shell and w(core):w(shell)=3:2. The particle size is 110nm and with core-shell structure. The contact angle of emulsion film to water is 98.1º. The synergistic effect of versatate and fluorocarbon based on core-shell structure improve the over-all properties effectively.

Abstract: As technology node progressing, ultra low-k film has been implemented to reduce RC delay in LSI circuit. A fluorocarbon (CFx) film is proposed as foreground ultra low-k film because of non-porous structure [1]. Although CFx film is expected to be stable for its structure advantage, damage-less process is anticipated to avoid dielectric constants change in subsequence process steps [2]. CMP and post CMP process are concerned to bring damage on devices, so the effect of post CMP cleaning solutions on CFx structure and electric property is evaluated.