Method of manufacture of a multi-layer device comprising a repair layer having conductive hydrogel film or beads
AssigneeE Ink Corporation
InventorNishit Murari
Life of this patent
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Abstract
A multi-layer device and its method of manufacture are disclosed. The multi-layer device comprises a first electrode layer, a first repair layer, a functional layer, and a second electrode layer. The first repair layer comprises a conductive hydrogel film or conductive hydrogel beads, the conductive hydrogel film or the conductive hydrogel beads comprising conductive filler particles dispersed in a cross-linked polymer. The repair layer protects the multi-layer device from electrical short circuits. A multi-layer device is also disclosed including a light-transmissive electrode layer comprising a porous mesh or porous spheres.
Claims20
A method of manufacture of a multi-layer device, the method of manufacture comprising the steps:
- providing an assembly comprising a first electrode layer and a functional layer;
- providing an aqueous dispersion comprising conductive hydrogel beads, wherein the aqueous dispersion is formed by (i) providing an aqueous composition comprising conductive filler particles and a cross-linkable polymer;
- and (ii) adding an aqueous solution of a cross-linking agent into the aqueous composition under agitation;
- applying the aqueous dispersion onto the functional layer forming an aqueous layer comprising conductive hydrogel beads;
- and
- drying the aqueous layer comprising conductive hydrogel beads, forming a repair layer on the functional layer, the repair layer comprising conductive hydrogel beads, the conductive hydrogel beads comprising conductive filler particles dispersed in a cross-linked polymer, the conductive hydrogel beads having diameter of from 1 μm to 1 mm.
A method of manufacture of a multi-layer device, the method of manufacturing comprising:
- providing a first assembly comprising a first electrode layer;
- applying a first composition onto the first electrode layer forming a first film;
- applying a second composition onto the first film to form a second assembly;
- the first composition comprising a functional material and a cross-linkable polymer, and the second composition comprising conductive filler particles and a cross-linking agent, or the first composition comprising the functional material, conductive filler particles and the cross-linking agent, and the second composition comprising the cross-linkable polymer;
- the cross-linking agent being able to cross-link the cross-linkable polymer of the first aqueous film;
- drying the second assembly to form a functional layer comprising the functional material, and a repair layer comprising a conductive hydrogel film having conductive filler particles dispersed in a cross-linked polymer, the functional layer being located between the first electrode layer and the repair layer.
Dependencies are inferred from the claim text.