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Resistive Ribbon Thermal Transfer Print Heads

IP.com Disclosure Number: IPCOM000102168D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 29K

Publishing Venue

IBM

Related People

Lane, R: AUTHOR [+2]

Abstract

This article describes a fabrication technique that is inexpensive compared to the RIE process and can almost match the cross-sectional area of the RIE heads. A one-mil-thick polyimide sheet is used onto which is deposited a 1000 A Cu film. This film acts as an electrode during the plating process. Thick resist is then applied to the Cu surface and is exposed with the wide electrode pattern. The exposed Cu is then plated with a film of Cu to a thickness in the range of 5 to 7 um. This Cu film provides an excellent thermal conductor under the nickel film which is subsequently deposited. The thickness of the nickel deposition is only limited by the thickness of the resist. The nickel film has been co-deposited with Al2O3 powder of 0.

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Resistive Ribbon Thermal Transfer Print Heads

       This article describes a fabrication technique that is
inexpensive compared to the RIE process and can almost match the
cross-sectional area of the RIE heads.  A one-mil-thick polyimide
sheet is used onto which is deposited a 1000 A Cu film.  This film
acts as an electrode during the plating process.  Thick resist is
then applied to the Cu surface and is exposed with the wide electrode
pattern.  The exposed Cu is then plated with a film of Cu to a
thickness in the range of 5 to 7 um.  This Cu film provides an
excellent thermal conductor under the nickel film which is
subsequently deposited.  The thickness of the nickel deposition is
only limited by the thickness of the resist.  The nickel film has
been co-deposited with Al2O3 powder of 0.3 um diameter This
co-deposition, plus annealing, increases the hardness of the film to
a level where it is the same as that of the tungsten sheet used in
the RIE process.  The last step is to chemically wet-etch the 1000 A
film between the electrodes.

      Lubricant additives, such as TEFLON* or MoS2, can be plated
with the nickel to help reduce the friction between the print head
and the printing ribbon.
*  Trademark of E. I. du Pont de Nemours & Co.