Reuseable Dual Polyimide Layer Thermal Ribbon
Original Publication Date: 1983-Jul-01
Included in the Prior Art Database: 2005-Feb-07
A thermal ribbon has a one-half-mil thick polyimide film upon which is vacuum deposited a thin metal layer which may be nickel, and upon the metal is a vacuum-deposited silicon dioxide. A fluid mixture of curable polyimide and graphite is applied to the silicon dioxide layer and then cured with heat. The ink may be a known thermal ink applied as a hot melt or applied from solution, as is suited to the ink. The first polyimide film serves as the supporting substrate, and in doing so replaces stainless steel foil, thereby eliminating the inherent stiffness of stainless steel from the final structure.