Scanning Probes Entering Data Storage: From Promise to Reality

H. Pozidis, P. Bachtold, J. Bonan, G. Cherubini, E. Eleftheriou, M. Despont, U. Drechsler, U. Durig, B. Gotsmann, W. Haberle, C. Hagleitner, D. Jubin, A. Knoll, M. Lantz, A. Pantazi, H. Rothuizen, A. Sebastian, R. Stutz, D. Wiesmann
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引用次数: 8

Abstract

Micro-electro-mechanical-system (MEMS)-based scanning-probe data storage devices are emerging as ultra-high-density, low-access-time, and low-power alternatives to conventional data storage. The probe-storage technique explored at IBM utilizes AFM probes and thermomechanical means to store and retrieve information in thin polymer films. High data rates are achieved by parallel operation of large 2D arrays with thousands of micro/nanomechanical cantilevers/tips that can be batch-fabricated by silicon surface micromachining techniques. The very high precision required to navigate the probe-tips over the storage medium is achieved by MEMS-based x/y actuators that position the large arrays of probe tips for parallel write/read/erase operations. For thermomechanical scanning-probe storage the polymer medium plays a crucial role. Based on a systematic study of different polymers it has been identified that the glass-transition temperature is the most important property that needs to be controlled for indentation writing and erasing at very narrow spacing. A prototype system demonstrating all the basic functions of a storage device based on scanning probes has been built and its main building blocks will be described in this paper. The inherent parallelism, the ultrahigh areal densities and the small form factor that probe storage techniques offer may open up new perspectives and opportunities for application in areas beyond those envisaged today.
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扫描探针进入数据存储:从承诺到现实
基于微机电系统(MEMS)的扫描探针数据存储设备正以超高密度、低访问时间和低功耗的优势取代传统的数据存储设备。IBM探索的探针存储技术利用AFM探针和热机械手段在薄聚合物薄膜中存储和检索信息。采用硅表面微加工技术批量制造的具有数千个微/纳米机械悬臂/尖端的大型二维阵列的并行操作可以实现高数据速率。通过基于mems的x/y致动器实现了在存储介质上导航探针尖端所需的非常高的精度,该致动器定位大型探针尖端阵列以进行并行写/读/擦除操作。对于热机械扫描探针的存储,聚合物介质起着至关重要的作用。通过对不同聚合物的系统研究,确定了玻璃化转变温度是在非常窄的间距下进行压痕书写和擦除需要控制的最重要的性质。本文建立了一个原型系统,演示了基于扫描探头的存储设备的所有基本功能,并对其主要组成部分进行了描述。探针存储技术固有的并行性、超高的面密度和小的外形因素可能会为超出今天设想的领域的应用开辟新的前景和机会。
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