Browse Prior Art Database

Ceramic Metallization and Nickel Plating for Contamination Control

IP.com Disclosure Number: IPCOM000123648D
Original Publication Date: 1999-Feb-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Prater, W: AUTHOR [+2]

Abstract

A means is disclosed to reduce particulate contamination from ceramic disk drive components by metallization and electroless nickel plating. Disk drive components, like E-blocks and spacer rings, can be made out of ceramics because their desirable properties of high specific stiffness, high strength and thermal properties can enhance seek and thermal off-track performance. However, ceramic surfaces can be a a significant source of particulate contaminants, which can cause files to fail at the head-disk interface. A metallic coating both seals the surface of contamination and provides the ceramic with an electrically conductive skin. This metallic coating provides the additional benefit of protecting the read/write heads from being damaged by static electric discharge.

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Ceramic Metallization and Nickel Plating for Contamination Control

   A means is disclosed to reduce particulate contamination
from ceramic disk drive components by metallization and electroless
nickel plating.  Disk drive components, like E-blocks and spacer
rings, can be made out of ceramics because their desirable properties
of high specific stiffness, high strength and thermal properties can
enhance seek and thermal off-track performance.  However, ceramic
surfaces can be a a significant source of particulate contaminants,
which can cause files to fail at the head-disk interface.  A metallic
coating both seals the surface of contamination and provides the
ceramic with an electrically conductive skin.  This metallic coating
provides the additional benefit of protecting the read/write heads
from being damaged by static electric discharge.

   Metallization of the ceramic is a means to eliminates the
possibility of ceramic particles dislodging from the surface and
becoming airborne.  Metallization can be accomplished by two
methods.  The first is to paint a suspension Molybdenum Manganese
alloy and glass particles on the surface.  After firing the glass
fuses to the ceramic and the metal melts and bonds to the glass.
Subsequent electroless nickel plating produces a clean, non-porous,
corrosion resistant surface.  The alternate method of metallizing is
to use a physical deposition process to sputter metal from a target
onto the ceramic in a vacuum chamber.

   Mu...