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US 4,400,100 AGranted
Four layered ribbon for electrothermal printing
AssigneeInternational Business Machines Corporation
InventorsAri Aviram, Susan O. Ellmann
Life of this patent
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Abstract
Four layer resistive ribbon transfer tapes for use in electrothermic printing devices are fabricated. The tapes are comprised of a substrate having a heat transferable ink on one of its surfaces, and on its opposing surface there is disposed a metal layer. Bonded to the metal layer is a resistive layer. This resistive layer is caused to be bonded to the metal layer by a layer of an alkoxysilane compound therebetween.
Claims8
An improved resistive ribbon for electrothermal printing comprising,
- a substrate having at one of its surfaces an ink which when heated is transferable onto a printing surface;
- a metal layer on the opposing surface of said substrate,
- a resistive composition layer atop said metal layer;
- and a bonding layer between said metal layer and said resistive layer to bond said metal and resistive layers together.
1 more element
A method for fabricating four layered resistive ribbons for electrothermal printing including the steps of:
- (a) providing a substrate having a conducting film disposed on one of its surfaces;
- (b) applying a thin layer of an alkoxysilane adhesion promoter to said conducting film having the following structures:
- ##STR3## where R is CH.sub.3 or C.sub.2 H.sub.5, Y=1-18 and X is 1-18, and
- (R--O).sub.3 --Si--(CH.sub.2).sub.n --NH.sub.2
- where R is an alkane group having from 1-5 C atoms and n is from 1-18;
- (c) heating said adhesion promoter coated substrate at a temperature and for a time sufficient to cause said adhesion promoter to adhere to said conducting film,
- (d) cooling the substrate and coating a resistive composition layer onto said adhesion promoter layer;
- (e) again heating said so coated substrate for a time and at a temperature sufficient to cause said resistive composition layer to adhere to said adhesion promoter layer;
- and thereafter
- (f) coating on the other surface of said substrate an ink which is transferable onto a printing surface when electrothermally heated.
7 more elements
Dependencies are inferred from the claim text.