Electrical and thermal recording techniques using a heater integrated microprobe

Dong Weon Lee, Takahito Ono, Masayoshi Esashi

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

In this paper, we describe the fabrication of a heater integrated microprobe and we propose microprobe-based electrical and thermal recording techniques for application to high-density data storage. The small heater with a sharp tip is located at the free end of the microprobe and can be heated up electrically by flowing a pulsed current through the microprobe legs. The generated heat is transferred to the media through the tip to create a bit. The dimensions of the small heater are minimized to reduce the power consumption and increase the thermal response. For the electrical recording on the thin Pb(ZrTi)O3 (PZT) film, a pulse voltage is applied between the conductive tip and the bottom Pt electrode, which induces a local polarization of the PZT. To read the direction of the local polarization, the static deflection of the microprobe is measured through a lock-in amplifier while the tip with small ac voltage is traveling on the PZT medium. For the thermal recording on the thin AgInSbTe film, the small heater is employed instead of a focused laser. The electrical resistance between the tip and the bottom Pt electrode is directly measured to read the phase information in a local region. The recording marks on both materials are below 100 nm in diameter, which corresponds to the areal density of 100 Gb in.-2.

Original languageEnglish
Pages (from-to)841-848
Number of pages8
JournalJournal of Micromechanics and Microengineering
Volume12
Issue number6
DOIs
Publication statusPublished - 2002 Nov 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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