Protective Ink Release Layer for R2t2
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
Resistive ribbons are well known for use in electrothermal printing, where the passage of electrical current through the ribbon from an electrode causes localized heating in the ribbon in order to melt an ink layer on the ribbon. When the ink is locally melted, it will transfer to a carrier, such as paper. Repeated printing causes erosion of the metal current-return layer (A1) in the ribbon. This limits the number of times the ribbons can be reused. In order to protect the metal layer, a plasma polymerized layer of octadecyltriethoxysilane is used between the metal layer and the ink layer. In addition to serving as a protective layer for the metal, this silane layer serves as a release layer for the ink, enabling its ready transfer to the carrier.