Browse Prior Art Database

Piezoelectric Element Self Check

IP.com Disclosure Number: IPCOM000108171D
Original Publication Date: 1992-Apr-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 1 page(s) / 33K

Publishing Venue

IBM

Related People

Malagrino GD, Jr: AUTHOR [+2]

Abstract

A procedure and experimentation summary learned from using the piezoelectric (PZT) element to create a self-checking glide height test head for head-to-head correlation and channel calibration is disclosed.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Piezoelectric Element Self Check

      A procedure and experimentation summary learned from using the
piezoelectric (PZT) element to create a self-checking glide height
test head for head-to-head correlation and channel calibration is
disclosed.

      The figure depicts a means for inputting a signal into a
standard glide height test head and monitoring the output for use in
head and channel calibration.

      Using a standard glide height test slider 10 and PZT, you add
two additional wires 12, 14 on one side of the PZT crystal 16
(besides the current two) and scribe the sputtered surface to make
two halves.  You can input current into one half, exciting the
crystal 16, while reading the output voltage through the other half.
The output voltage can then be compared or checked against what is
known, in order to provide calibration from tester to tester and head
to head.

      These four wires would then be connected in parallel during
normal operation to, in effect, provide one solid crystal again.

      Disclosed anonymously.