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Piezo Electric Pulse Signals to Prevent Electron Crystalline Migration

IP.com Disclosure Number: IPCOM000107723D
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Nahata, P: AUTHOR [+2]

Abstract

Described is a technique which applies pulse signals to a piezo- electric device so as to prevent electron crystalline migration during sustained operations.

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This is the abbreviated version, containing approximately 72% of the total text.

Piezo Electric Pulse Signals to Prevent Electron Crystalline Migration

       Described is a technique which applies pulse signals to a
piezo- electric device so as to prevent electron crystalline
migration during sustained operations.

      The conceept described herein pertains to a piezo electric
device as used in robotic equipment.  The device utilizes a piezo
crystal element, as shown in Fig. 1, to control a combination of
three fingers and three motion units (not shown).  Three wires are
attached to the crystal element for controlling the fingers and the
motion units. One of the wires is at ground potential when no signals
are received.  When a finger deflection, or Z-motion, is required,
then a high potential is applied to either of the other two wires
depending on the direction of the deflection.  This high potential
continues to be applied as long as the deflection position is to be
maintained. However, it is not uncommon for the crystalline material
to break down during sustained application of the resulting high
potential.  This breakdown results in a lowering of the resistivity
and ultimately a loss of movement in the fingers.

      To overcome the breakdown effects of the crystalline material
of the piezo device, introduced is the concept of pulse signals to
prevent electron migration of the crystalline material in sustained
operations.  This prevents the crystalline breakdown and in turn
maintains the required finger positioning.

     ...