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- 저자 : Cihan Kuru (검색결과 2 건)
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Chulmin Choi,Kunbae Noh,Young Oh,Cihan Kuru,Daehoon Hong,Li-Han Chen,Sy-Hwang Liou,Tae-Yeon Seong,Sungho Jin IEEE 2011 IEEE transactions on magnetics Vol.47 No.10
<P>We have investigated the magnetic M-H loop characteristics of CoCrPt-SiO<SUB>2</SUB> perpendicular recording media as influenced by nonmagnetic ion implantations. We have also developed patterned media via ion implantation using a convenient polymer nanomask approach for local control of coercivity of magnetically hard [Co/Pd]<I>n</I> multilayer film with a [Co 0.3 nm \Pd 0.8 nm] <SUB>8</SUB>/Pd 3 nm/Ta 3 nm layer structure. The CoCrPt-SiO<SUB>2</SUB> magnetic layer having perpendicular magnetic anisotropy is sputter deposited on a flat substrate. The [Co/Pd] <I>n</I> multilayer film with vertical magnetic anisotropy is deposited and the regions corresponding to the magnetic recording bit islands are coated with polymer islands using a nanoimprinting technique. Subsequent ion implantation allows patterned penetration of implanted ions into the [Co/Pd]<I>n</I> multilayer film, thus creating magnetically isolated bit island geometry while maintaining the overall flat geometry of the patterned media.</P>
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CHULMIN CHOI,Soonkook Hong,LI-HAN CHEN,Chin-Hung Liu,Duyoung Choi,Cihan Kuru,진성호 대한금속·재료학회 2014 ELECTRONIC MATERIALS LETTERS Vol.10 No.3
Vertically anisotropically conductive composites with aligned chain-of-spheres of 20 - 75 μm Ni particles in an elastomer matrix have been prepared by curing the mixture at 100°C - 150°C under an applied magnetic field of ~300 - 1000 Oe. The particles are coated with a ~120 nm thick Au layer for enhanced electrical conductivity. The resultant vertically aligned but laterally isolated columns of conductive particles extend through the whole composite thickness and the end of the Ni columns protrude from the surface, contributing to enhanced electrical contact on the composite surface. The stress-strain curve on compressive deformation exhibits a nonlinear behavior with a rapidly increasing Young's modulus with stress (or pressure). The electrical contact resistance Rc decreases rapidly when the applied pressure is small and then more gradually after the applied pressure reaches 500 psi (~3.4 MPa), corresponding to a 30% deformation. The directionally conductive elastomer composite material with metal pads and conductive electrodes on the substrate surface can be used as a convenient tactile shear sensor for applications involving artificial limbs, robotic devices, and other visual communication devices such as touch sensitive screens.
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