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US 6,783,915 B2Granted
Thermal transfer of a black matrix containing carbon black
Assignee3M Innovative Properties Company
InventorsRichard J. Pokorny, Raghunath Padiyath, Kazuki Noda
Life of this patent
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Abstract
A black matrix can be formed by thermal transfer on a receptor substrate for use, for example, in a display application. This black matrix can be used, for example, as a color filter black matrix or a TFT (thin film transistor) black matrix to provide contrast and/or to separate adjacent electrically-conducting components.
Claims5
A method of forming a display device having a plurality of pixel elements, each pixel element comprising an electrically-conducting element to operate the pixel element, comprising:
- forming a light-to-heat conversion layer over a donor substrate;
- forming a black matrix transfer layer over the light-to-heat conversion layer;
- contacting a substrate of the display device with the black matrix transfer layer;
- selectively irradiating, according to a pattern, the light-to-heat conversion layer with light having at least one wavelength that the light-to-heat conversion layer can convert to heat energy;
- thermally transferring, according to the pattern, a portion of the black matrix transfer layer to the substrate of the display device to form a black matrix defining a plurality of pixel elements, the black matrix having an optical density sufficient to provide optical contrast between adjacent pixel elements, a resistivity that substantially prevents cross-talk between the electrically-conducting elements of adjacent pixel elements, and a thickness to maintain substantial planarity with at least a portion of adjacent electrically-conducting elements;
- forming, for each pixel element, an electrically-conducting element on the substrate of the display device, the black matrix separating adjacent electrically-conducting elements.
3 more elements
Dependencies are inferred from the claim text.