Manufacturing of nano particle array substrates

researcher's name
research field
Device related chemistry,Nanobioscience,Electronic materials/Electric materials


Current hard disk drives are arranged using sputtering. Bit density growth rates have decreased from an annual rate of 100% to around 40% today. This disk structure, which has supported magnetic recording over the past 10 years, is a result of technological progress. The creation of future drive structures with remarkable bit densities of over 1T requires a fundamental shift in our systems, including their materials. 


This project proposes the creation of nano particle array technology in order to realize bit pattern media (BPM) in which chemosynthesis is used to assign one recorded bit per single electro-particle with particle sizes of a few nanometers. The diagram is a scanning electron microscope (SEM) image showing a substrate with a physical guide attached to it, to which chemically modified organic particles have been joined, with FePt nanoparticles lined up on top of that. The registered array grouping of particles is foamed on the surface of meniscus which arises when the dispersed solution in the particles is dried, so it is possible that regularly arranged particles are moving in different directions. As such, it is possible to create a large domain of arrayed particles fixed on the substrate, ranging from a size of 10 to several 100 nanometers. However, disorder can be induced within such a range. Extremely small differences in particle diameters make the movement power between particles unequal, which catalyzes disorder in each array. The physical guide serves the role of preventing such disorder and making the domain more robust. 


A vertically organized bit pattern electronic media. A quantum dot device.


Nano-particle arrays are revolutionary technology. The size of the physical grid is sufficient at around 100nm, making the technology compatible with current pattern manufacturing technology. From the perspective of commercialization, this offers a cheap system for atmospheric wet technology as it does not require arrangement in a vacuum. 

purpose of providing seeds

Sponsord research, Collaboration research, Technical consultation


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posted: 2014/05/21