Texture control of thin film layers prepared via laser induced thermal imaging
View Patent ↗A thermal transfer donor element is provided which includes a support, light-to-heat conversion layer, interlayer, and thermal transfer layer. When the donor element is brought into contact with a receptor and imagewise irradiated, a portion of the transfer layer is transferred to the receptor. The relative surface texture of the layers can be at least partially controlled, prior to imaging of the donor element, for desired effects in the resulting receptor device. The construction and process of the donor element is useful in making colored images including applications such as color proofs, color filter elements, and organic light emitting displays.
1. A process for transferring an image onto a receptor comprising the steps of:
providing on a substrate a light-to-heat conversion layer, an interlayer coated on the light-to-heat conversion layer, and a thermal transfer layer coated on the interlayer, wherein the interlayer comprises metal;
placing the thermal transfer layer in contact with a surface of the receptor;
irradiating the light-to-heat conversion layer in an imagewise pattern with a light source to thermally transfer portions of the thermal transfer layer corresponding to the imagewise pattern to the receptor; and
controlling, at least partially, a surface texture of the transfer layer prior to the placing step and prior to imaging of the transfer layer, wherein the controlling step includes selecting coating conditions for the light-to-heat conversion layer and the interlayer in the providing step in order to control the surface texture of the transfer layer.
2. The process of claim 1 , wherein the interlayer comprises silver.
3. The process of claim 1 , wherein the controlling step includes using a particular thickness of the transfer layer prior to the place step and prior to the imaging.
4. The process of claim 1 , further including the step of controlling a uniformity in the coating of the interlayer.