Browse Prior Art Database

Magnetic Disk Servo Patterning by Polymer Over Photoconductor Surface Modulation

IP.com Disclosure Number: IPCOM000106874D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Falcone, SJ: AUTHOR [+3]

Abstract

A process is disclosed for printing a high track density servo pattern on metallic substrates by polymer-over-photoconductor (POP) technique. This technique is used in the magnetic storage application.

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

Magnetic Disk Servo Patterning by Polymer Over Photoconductor Surface Modulation

      A process is disclosed for printing a high track density servo
pattern on metallic substrates by polymer-over-photoconductor (POP)
technique.  This technique is used in the magnetic storage
application.

      Substrates for magnetic storage are first coated with a layer
of photoconducting polymer followed by a layer of polymer.  The
substrate is electrically grounded.  A corona discharge wire is used
to change the polymer surface with static charges.  The electrostatic
servo pattern image is printed on the polymer lithographically.  This
electrostatic image is developed chemically, optically or thermally.
After the development, the residue electrostatic charges are
neutralized through blanket exposure.  The substrate is ready for
subsequent magnetic and protective coating deposition and processes.

References

[1]  R. W. Gundlach, "A Cyclic Xerographic Method Based on Frost
   Deformation", IBM Technical Report RJ4030, (September, 1983).
                 ___________________________
[1]  U. S. Patent 4,948,703.