| JSR TECHNICAL REVIEW No.115 (March, 2008) |
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| Properties of Hydrogenated Polystyrene-blockpoly (styrene-co-butadiene) -block-polystyrene (SSEBS) and
its Miscibility in the Blends with Polypropylene
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| Takashi Toyoizumi, Nobuyuki Toyoda, Kazuhisa Kodama, Masashi Shimakage, Iwakazu Hattori
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Physical properties and morphology of a series of hydrogenated polystyrene-block-poly (styrene-cobutadiene) -
block-polystyrene (SSEBS) were investigated using tensile test, transmission electron microscope (TEM) and pulse NMR. Physical properties and miscibility of the blends of SSEBS with isotactic
polypropylene (PP) also were investigated using the same methods. These SSEBS were prepared by hydrogenation
of anionically polymerized polystyrene-block-poly (styrene-co-butadiene) -block-polystyrene (S-SBS) .
The content of styrene in the SB block was varied from 0 to 25 % in order to examine effects of styrene
content. The total styrene contents of two end polystyrene blocks were about 15 %. Tensile strengths and
scratch hunting resistance of the blends of those S-SEB-Ss with PP increased with increase in styrene content
of SEB block. However, the miscibility of the blends slightly decreased with increase in the styrene
content.
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| Advanced CMP Consumables for 32nm Generation
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| Masayuki Motonari, Shoei Tsuji, Tomohisa Konno, Hirotaka Shida, Kazuhito Uchikura, Iwao Mihara, Hiroyuki Miyauchi
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For coming 32nm generation and beyond in Integrated Circuit (IC) manufacturing, innovational
Chemical Mechanical Polishing (CMP) material is necessary to prevent any damage of delicate film stack
and structure with low-k dielectric materials during CMP process. The low-k dielectric materials used in
this generation and Cu material for wiring can be easily damaged by mechanical force and chemical reaction.
Furthermore, higher planarity with low dishing and erosion is desired. To meet these demanding requirements,
approach combining pad and slurry technologies would be quite essential. JSR has developed
advanced 32nm CMP consumables with slurry, which contains soft abrasive and unique chemistry, and
lower hardness solid pad. This paper describes discussion on some of the essential key technology for copper
and barrier polish. Lower defectivity with better planarity has been confirmed with JSR CMP consumable
sets.
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| High Reliability Alignment Material for Active Matrix LCD Fabricated
by Low Temperature Bake Processes
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| Tsuyoshi Hirai, Atsushi Kumano, Shigeyoshi Otsuki
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A new alignment material has been developed for Active Matrix Liquid Crystal Display (AM-LCD)
which was fabricated with low temperature baking process. The alignment material exhibits high voltage
holding ratio, low residual DC voltage and high reliability. The alignment material is suitable for high reliability
plastic-film-based AM-LCD.
We prepared a plastic passive matrix color twisted nematic cell by using the alignment material and
the color filter, which was fabricated by a Roll-to-Roll process. Thickness and weight of the plastic cell were
about 1/6 and 1/10 respectively compared with those of conventional cell based on a glass substrate.
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| Development of Magnetic Particles for Biomolecule Separation
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| Tomohiro Uetsuhara, Satoshi Katayose, Masaru Ueno, Tetsuo Fukuta, Koji Tamori
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Filtration, centrifugation and column chromatography have been common methods for separation of
biomolecules (bioseparation) , however, these methods sometimes do not satisfy the researchers at the advanced
biomedical science in terms of purity, selectivity, yield, concentration or simplicity of operations. Instead,
authors designed and developed novel hydrophilic magnetic particles as solid support for bioseparation.
These particles enable rapid separation with easy handling due to their superparamagnetic property. It
became clear that increase of hydrophilicity of the surface of the particles is very effective not only in reduction
of non-specific binding (NSB) but also in protection of activity of the probes immobilized onto the
particles. These particles indicated extremely high selectivity in bioseparation processes, which was demonstrated
by some practical examinations. Now, the novel hydrophilic magnetic particles“Magnosphere”developed
in this study have the ability to overcome other methods for bioseparation.
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