Method of forming a top plane connection in an electro-optic device
An electrical connection between the backplane and the light-transmissive front electrode of an electro-optic display is provided by forming an aperture through the top front electrode coupled and a substrate coupled thereto and subsequently introducing a flowable, electrically-conductive material into the aperture. The flowable, electrically-conductive material provides an electrical contact between the light-transmissive electrically-conductive layer and the backplane.
1. A process for the production of an electro-wetting device, the process comprising:
providing a light-transmissive electrically-conductive layer coupled to a top light-transmissive substrate;
providing a backplane comprising an array of pixel electrodes and an arrangement of conductors to connect the pixel electrodes to drive circuitry for controlling an electro-wetting device;
forming an aperture through the light-transmissive electrically-conductive layer and the top light-transmissive substrate; and
introducing a flowable, electrically-conductive material into the aperture, the flowable, electrically-conductive material being in electrical contact with the light-transmissive electrically-conductive layer, extending through the top light-transmissive substrate, and making an electrical connection between the light-transmissive electrically-conductive layer and an electrode of the backplane.
2. The process according to claim 1 , wherein forming the aperture is effected by laser cutting.
3. The process according to claim 1 , wherein the flowable, electrically-conductive material comprises a conductive adhesive or a conductive ink.
4. The process according to claim 1 , wherein the backplane is flexible.
5. The process according to claim 4 , wherein the backplane is prepared by printing the pixel electrodes and conductors on a flexible substrate.