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Wear-Tolerant, Fine, Electrical Probe for Data Storage

IP.com Disclosure Number: IPCOM000113155D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Barrett, RC: AUTHOR [+6]

Abstract

Disclosed is a wear-tolerant, fine electrical probe suitable for use in moving media data storage. An example of its use is for charge storage in Nitride-Oxide-Silicon (NOS).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 72% of the total text.

Wear-Tolerant, Fine, Electrical Probe for Data Storage

      Disclosed is a wear-tolerant, fine electrical probe suitable
for use in moving media data storage.  An example of its use is for
charge storage in Nitride-Oxide-Silicon (NOS).

      It has been demonstrated by (1) that NOS can be used as a data
storage media in a moving media storage device.  A conducting stylus
is moved along the NOS surface with voltage pulses applied between
the stylus and silicon to write bits.  The data are stored in the
form of trapped charge and are detected by means of a capacitance
sensor connected to the stylus.  One problem with this technology,
which is solved by this invention, is the wear of the probe due to
its contact with a rapidly spinning disk.

      Following the teachings of (2), a wear-tolerant member may be
fabricated from a ceramic, such as alumina.  Using thin film
processing, a fine conducting line is embedded in the ceramic body,
as shown in the figure.  The metal line forms the electrical probe
and consists of a contact pad area, a metal line for data writing and
capacitance detection, and output electrical contact.  The cross
section of the line in the contact pad area defines the active area
and can be made small by suitable lithographic techniques.  The cross
section is uniform so that any wear of the line will not change the
probe area.  The ceramic body serves both as a mounting vehicle for
the probe and as a suspension for controlling the pr...