Abstract: A method of making an electronic device comprising a double bank well-defining structure, which method comprises: providing an electronic substrate; depositing a first insulating material on the substrate to form a first insulating layer; depositing a second insulating material on the first insulating layer to form a second insulating layer; removing a portion of the second insulating layer to expose a portion of the first insulating layer and form a second well-defining bank; depositing a resist on the second insulating layer and on a portion of the exposed first insulating layer; removing the portion of the first insulating layer not covered by the resist, to expose a portion of the electronic substrate and form a first well-defining bank within the second well-defining bank; and removing the resist. The method can provide devices with reduced leakage currents.

Abstract: A printing method for use in fabrication of an electronic unit comprising one or more lines of a regularly repeating structural feature formed over a substrate, the structural feature repeating over a regular interval along each line. The method comprises: using a first print-head arrangement to print portions of a composition at a first pitch along each of the lines; and using a second print-head arrangement to print portions of the composition at a second pitch along each of the lines; such that the first and second pitches together produce a beating pattern along each of the lines, having a beating wavelength matched to the interval of the regularly repeating structural feature.

Abstract: A printing method for use in fabrication of an electronic unit comprising one or more lines of a regularly repeating structural feature formed over a substrate, the structural feature repeating over a regular interval along each line. The method comprises: using a first print-head arrangement to print portions of a composition at a first pitch along each of the lines; and using a second print-head arrangement to print portions of the composition at a second pitch along each of the lines; such that the first and second pitches together produce a beating pattern along each of the lines, having a beating wavelength matched to the interval of the regularly repeating structural feature.

Abstract: A method of making an electronic device comprising a double bank well-defining structure, which method comprises: providing an electronic substrate; depositing a first insulating material on the substrate to form a first insulating layer; depositing a second insulating material on the first insulating layer to form a second insulating layer; removing a portion of the second insulating layer to expose a portion of the first insulating layer and form a second well-defining bank; depositing a resist on the second insulating layer and on a portion of the exposed first insulating layer; removing the portion of the first insulating layer not covered by the resist, to expose a portion of the electronic substrate and form a first well-defining bank within the second well-defining bank; and removing the resist. The method can provide devices with reduced leakage currents.

Abstract: A method of fabricating an organic electronic device using ink jet printing in swathes, comprises depositing an ink into a first set of locations in a column in a first print pass; wherein the first set of locations is less than a total number of locations in the column; and depositing an ink into a second set of locations in the column in a subsequent print pass; wherein the second set of locations is less than a total number of locations in the column. Preferably the number of nozzles used to fill all locations in a column is equal to the number of print passes needed to print the column. All locations in the swathe are printed after all print passes using a regular repeating randomized pattern, such that be ensured that print locations are not under filled, or over filled.

Abstract: An inkjet printer has ink channels extending through a body, each channel being offset relative to a central plane with respect to the adjacent channel. A manifold extends through the body, intersecting each channel to define a channel end profile. The channel end profile of one channel is substantially a mirror image of the channel end profile of the adjacent channel, so that the acoustic was refection coefficient of the boundary between each channel and the manifold is substantially equal for all channels. An inclined region of the channel end profile facilitates the formation of connecting tracks for the channel electrodes.