Laser decal transfer of electronic materials
First Claim
1. A method for laser decal transfer comprising:
- providing a receiving substrate;
providing a target substrate spaced away from the receiving substrate and comprising a laser transparent support having a back surface and a front surface, wherein the front surface of the target substrate is coated with a layer of a rheological compound of selected thickness and viscosity; and
providing an incident laser beam directed through the back of the target substrate to illuminate a given area of the coating, said illuminated area having a size and a shape, said incident laser beam having an energy density and uniformity selected so as to uniformly release and laminarly transfer a region of the coating from the target substrate towards the receiving substrate, wherein the rheological compound is not substantially evaporated while transferred, wherein the transferred rheological compound forms a deposit at a defined location on the surface of the receiving substrate;
said transferred rheological compound having a substantially 1-to-1 correspondence in size and shape with the size and shape of the incident laser illuminated area, thereby causing a decal transfer of the rheological compound.
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Accused Products
Abstract
A laser decal transfer is used to generate thin film features by directing laser pulses of very low energy at the back of a target substrate illuminating an area of a thin layer of a high viscosity rheological fluid coating the front surface of the target. The illuminated area is shaped and defined by an aperture centered about the laser beam. The decal transfer process allows for the release and transfer from the target substrate to the receiving substrate a uniform and continuous layer identical in shape and size of the laser irradiated area. The released layer is transferred across the gap with almost no changes to its initial size and shape. The resulting patterns transferred onto the receiving substrate are highly uniform in thickness and morphology, have sharp edge features and exhibit high adhesion, independent of the surface energy, wetting or phobicity of the receiving substrate.
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Citations
28 Claims
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1. A method for laser decal transfer comprising:
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providing a receiving substrate; providing a target substrate spaced away from the receiving substrate and comprising a laser transparent support having a back surface and a front surface, wherein the front surface of the target substrate is coated with a layer of a rheological compound of selected thickness and viscosity; and providing an incident laser beam directed through the back of the target substrate to illuminate a given area of the coating, said illuminated area having a size and a shape, said incident laser beam having an energy density and uniformity selected so as to uniformly release and laminarly transfer a region of the coating from the target substrate towards the receiving substrate, wherein the rheological compound is not substantially evaporated while transferred, wherein the transferred rheological compound forms a deposit at a defined location on the surface of the receiving substrate;
said transferred rheological compound having a substantially 1-to-1 correspondence in size and shape with the size and shape of the incident laser illuminated area, thereby causing a decal transfer of the rheological compound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for laser decal transfer comprising:
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providing a receiving substrate; providing a target substrate spaced away from the receiving substrate and comprising a laser transparent support having a back surface and a front surface, wherein the front surface of the target substrate is coated with a layer of a rheological compound of selected thickness and viscosity; and providing an incident laser beam directed through the back of the target substrate to illuminate a given area of the coating, said incident laser beam having an energy density selected so as to uniformly release and laminarly transfer a region of the coating from the target substrate towards the receiving substrate, wherein the rheological compound is not substantially evaporated while transferred, wherein the transferred rheological compound forms a deposit at a defined location on the surface of the receiving substrate, said deposit being substantially similar in size and shape to size and shape of the area illuminated by the incident laser beam. - View Dependent Claims (28)
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Specification