The hydrophilization of polystyrene substrates by 172-nm vacuum ultraviolet light

Hozumi, Atsushi; Inagaki, Hironobu; Kameyama, Tetsuya

doi:10.1016/j.jcis.2004.06.005

Cited by 44 publications

(41 citation statements)

References 48 publications

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“…Such radicals react with activated oxygen species generated through the photoexcitation of atmosphere oxygen molecules. 41 Reaction mechanisms in APP and UV may have effects on the wettability of the treated PET surface and the subsequent hydrophobic recovery behavior due to the loss of LMWOM to the atmosphere and the surface arrangement. However, within the experimental data in this study, it is difficult to explain the reaction mechanism of the two dry processes.…”

Section: Surface Characteristics Of Pet Treated By Dry Processingmentioning

confidence: 99%

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Gotoh

Yasukawa

Kobayashi

2011

Polym J

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Two dry processes, atmospheric pressure plasma (APP) exposure and 172 nm ultraviolet (UV) excimer light irradiation, were carried out to enhance the hydrophilic nature of poly(ethylene terephthalate) (PET) film. The wettability change in the PET film surface after the processes were carried out was recorded by the wetting force measurements employing the Wilhelmy method. After the dry processes, drastic decreases in the advancing and receding contact angles of water were observed, especially for the APP exposure. The advancing angle on the treated PET surface was found to increase by rinsing with water or aging in air, whereas the receding one remained almost the same. The hydrophobic recovery diminished more rapidly for the UV-treated film. Surface characterizations of the PET film were performed. We discuss the influence of the dry processes on the physicochemical properties of the PET surface.

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Section: Surface Characteristics Of Pet Treated By Dry Processingmentioning

confidence: 99%

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Gotoh

Yasukawa

Kobayashi

2011

Polym J

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“…Several polymers have been modified by using UV excimer lamps at different wavelengths, such as 126 nm using Ar 2 *, [15] 172 nm using Xe 2 *, [16][17][18] and 222 nm using KrCl* [19] in various gas environments. Additionally, vacuum ultraviolet treatments using Xe 2 * excimer lamps were utilized to improve the bond strength of the flip chip and three dimensional (3D) interconnections.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Polyethylene Terephthalate (PET) by 172-nm Excimer Lamp

Kasahara

Shoji

Mizuno

2012

Transactions of The Japan Institute of Electronics Packaging

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We studied the effects of 172 nm Xe 2 * excimer lamp irradiation on polyethylene terephthalate (PET) surfaces. Two kinds of techniques were applied: vacuum ultraviolet (VUV) light irradiation and VUV irradiation in the presence of oxygen gas (VUV/O 3 ). The modified PET surfaces were investigated by using contact angle measurements which enabled the surface free energy to be calculated, X-ray photoelectron spectroscopy (XPS), nano-thermal analysis (nano-TA), and atomic force microscopy (AFM). The surface free energy increased significantly after the treatments. The results of XPS analysis showed that the elemental ratio of oxygen on the surface increased, whereas that of carbon decreased. From the deconvoluted C1s and O1s spectra, it was revealed that new oxidized functional groups such as alcoholic and carboxyl groups were generated. The nano-TA results showed that a low melting temperature (T m ) layer had formed on the VUV and VUV/O 3 treated PET surfaces. The results of AFM measurements showed there were no remarkable changes after the treatments compared with untreated PET. In summary, the VUV and VUV/O 3 treatments using a Xe 2 * excimer lamp not only change the surface functionalities but also reduce the T m of the PET surfaces without significantly affecting the surface morphologies.

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“…Polymer surface modification methods are classified into two categories. One is modification of the original surface (e.g., plasma treatment (Lianos et al, 1994;Kamińska et al, 2002;Chai et al, 2004;Lai et al, 2006), UV irradiation (Peeling & Clark, 1981;Murakami et al, 2003;Hozumi et al, 2004;Diaz-Quijada et al, 2007;Kim et al, 2009). The other is coating with other materials (Ratner, 1995;Oehr, 2003;Liu et al, 2004;Bi et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…The VUV generates not only O 3 and O( 1 D) in the same manner as the 185-nm and 254-nm UV lights, but is also absorbed directly by O 2 in the chamber to generate O( 1 D) (Kaspar et al, 2003). The 172-nm UV light irradiance on the sample surface can be controlled by the oxygen pressure and the distance between the lamp window and the sample (d) (Hozumi et al, 2004;Shinohara et al, 2008b). In UV (VUV)/O 3 treatment, O( 1 D) plays important roles on surface activation (Hozumi et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…The 172-nm UV light irradiance on the sample surface can be controlled by the oxygen pressure and the distance between the lamp window and the sample (d) (Hozumi et al, 2004;Shinohara et al, 2008b). In UV (VUV)/O 3 treatment, O( 1 D) plays important roles on surface activation (Hozumi et al, 2004). Polar oxidized components were also increased as well as the oxygen plasma treatments (Peeling & Clark, 1981;Diaz-Quijada et al, 2007;Kim et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low-Temperature Polymer Bonding Using Surface Hydrophilic Treatment for Chemical/Bio Microchips

Shinohara¹,

Mizuno²,

Shoji³

et al. 2010

Solid State Circuits Technologies

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The hydrophilization of polystyrene substrates by 172-nm vacuum ultraviolet light

Cited by 44 publications

References 48 publications

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Wettability characteristics of poly(ethylene terephthalate) films treated by atmospheric pressure plasma and ultraviolet excimer light

Surface Modification of Polyethylene Terephthalate (PET) by 172-nm Excimer Lamp

Low-Temperature Polymer Bonding Using Surface Hydrophilic Treatment for Chemical/Bio Microchips

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