Structured thermal transfer donors
View Patent ↗A laser induced thermal imaging (LITI) donor film having a substrate, a light-to-heat conversion layer overlaying the substrate, and a transfer layer overlaying the light-to-heat conversion layer. A surface of the transfer layer includes microstructured or nanostructured features, in a continuous or discontinuous pattern, embossed or otherwise imparted in the transfer layer. The features provide break points to assist in release and transfer of portions of the transfer layer to a permanent receptor in a pattern defined by the features.
1. A method of fabricating a microstructured or nanostructured article, comprising:
providing a laser induced thermal imaging (LITI) donor film, comprising:
a substrate;
a light-to-heat conversion layer overlaying the substrate; and
a transfer layer overlaying the light-to-heat conversion layer, wherein a surface of the transfer layer includes a plurality of microstructured or nanostructured features extending into the transfer layer;
placing the LITI donor film against a surface of a permanent receptor such that the transfer layer is in contact with the surface of the receptor; and
selectively transferring at least a portion of the transfer layer to the surface of the permanent receptor in a pattern defined by the features.
2. The method of claim 1 , wherein the providing step includes forming the microstructured or nanostructured features as a continuous pattern.
3. The method of claim 1 , wherein the providing step includes forming the microstructured or nanostructured features as a discontinuous pattern.
4. The method of claim 1 , wherein the microstructured or nanostructured features form a first pattern in the transfer layer, wherein the surface of the receptor has a structure forming a second pattern substantially matching the first pattern, and wherein the placing step includes substantially aligning the first pattern with the second pattern.
5. The method of claim 1 , wherein the transferring step includes transferring fusible elements to the permanent receptor, and farther including the step of fusing the fusible elements subsequent to the transferring step.
6. The method of claim 1 , wherein the providing step includes using an organic light emitting diode material, fluorescent material, or phosphorescent material for the transfer layer.
7. The method of claim 1 , wherein the transferring step includes transferring the portion as part of making a color filter.
8. A method of fabricating a microstructured or nanostructured article, comprising:
providing a laser induced thermal imaging (LITI) donor film, comprising:
a substrate;
a light-to-heat conversion layer overlaying the substrate; and
a transfer layer overlaying the light-to-heat conversion layer;
placing the LITI donor film against a surface of a permanent receptor, wherein a surface of the permanent receptor includes a tool having a plurality of microstructured or nanostructured features extending away from a surface of the tool and wherein the transfer layer is in contact with the microstructured or nanostructured features of the tool; and
selectively transferring at least a portion of the transfer layer to the surface of the permanent receptor having the tool in a pattern defined by the features.