Method of making a color filter with high speed and durable image-transfer characteristics for laser-induced thermal transfer
AssigneeE. I. Du Pont de Nemours and Company
InventorsGraciela Beatriz Blanchet-Fincher, Curtis Robinson Fincher, Jr.
Life of this patent
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Abstract
Improved processes for laser thermal imaging and imaged laserable assemblages obtained using the improved processes of this invention are described. These improved processes operate effectively at high speeds and also afford high image densities and good durability of images present on receiver elements upon thermal imaging done in accordance with these improved processes. One application of the improved process provides a color filter element.
Claims17
A method for making a color filter element comprising:
- (1) an exposure step of imagewise exposing to laser radiation a laserable assemblage comprising:
- (A) a donor element comprising in the order listed:
- (a) at least one ejection layer;
- (b) at least one heating layer;
- (c) at least one transfer layer having an outer surface and comprising a low decomposition temperature polymer having a decomposition temperature less than about 350.degree. C.;
- with the proviso that the donor element during the transfer process does not include a support;
- and
- (B) a receiver element in contact with the outer surface of the transfer layer (c) of the donor element;
- wherein the exposure step is effected at a laser fluence of at most approximately 440 mJ/cm.sup.2 ;
- and
- (2) a separating step of separating the donor element (A) from the receiver element (B).
A method for making a color filter element comprising:
- (1) an exposure step of imagewise exposing to laser radiation a laserable assemblage comprising:
- (A) a donor element comprising in the order listed:
- (a) at least one ejection layer;
- (b) at least one heating layer;
- (c) at least one transfer layer having an outer surface and comprising a low decomposition temperature polymer having a decomposition temperature less than about 350.degree. C.;
- with the proviso that the donor element during the transfer process does not include a support;
- and
- (B) an intermediate receiver element in contact with the outer surface of the transfer layer (c) of the donor element, the intermediate receiver element comprising
- (a) an image receiving layer;
- and
- (b) an intermediate support;
- wherein the exposure step is effected at a laser fluence of at most approximately 440 mJ/cm.sup.2 whereby a substantial portion of the transfer layer is transferred to the intermediate receiver element;
- and
- (2) a separating step of separating the donor element (A) from the intermediate receiver element (B), thereby revealing an image on the intermediate receiver element.
A method for making a color filter element comprising:
- (1) an exposure step of imagewise exposing to laser radiation a laserable assemblage comprising:
- (A) a donor element comprising in the order listed:
- (a) at least one ejection layer;
- (b) at least one heating layer;
- (c) at least one transfer layer having an outer surface and comprising at least 3% by weight of a high decomposition temperature polymer having a decomposition temperature greater than about 395.degree. C. in the presence of a dispersant which is a low decomposition temperature polymer having a decomposition temperature less than about 350.degree. C.;
- with the proviso that the donor element during the transfer process does not include a support;
- and
- (B) a receiver element in contact with the outer surface of the transfer layer (c) of the donor element;
- wherein the exposure step is effected at a laser fluence of at greater than 440 mJ/cm.sup.2 ;
- and
- (2) a separating step of separating the donor element (A) from the receiver element (B).
Dependencies are inferred from the claim text.