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US 7,022,534 B2Granted
Optimal bank height for inkjet printing
AssigneeOSRAM Opto Semiconductors GmbH
InventorsRahul Gupta, Andrew Ingle, Sriram Natarajan
Life of this patent
Estimating the term…
Abstract
The height of the photo-resist layer “banks” which define pockets for inkjet printing or other patterned processes is optimized to provide a more uniform drying profile for substances which are to be deposited in those pockets and dried therein. Preferably, the height of the photo-resist layer is less than or equal to about three microns and more, preferably, about one micron.
Claims16
A method of fabricating an organic electronic device, said method comprising:
- patterning a lower conducting layer upon a substrate;
- fabricating a photo-resist layer upon said lower electrode layer, said photo-resist layer having a height of not more than three microns, said photo-resist layer patterned into banks to define pockets upon said lower electrode layer, each pocket defining an active region of said device;
- and
- depositing at least one liquid substance into each said pocket, wherein said at least one liquid substance includes at least one polymer and is allowed to dry into layers contained within said pockets.
1 more element
An organic light emitting diode (OLED) display comprising a plurality of pixels, each pixel emitting light, the display comprising:
- a lower electrode layer;
- a photo-resist layer, said photo-resist layer fabricated upon said lower electrode layer, said photo-resist layer having a height of less than or equal to three microns, said photo-resist layer patterned into a plurality of banks to define pockets upon said lower electrode layer, each pocket defining the active region of each of said pixels;
- a plurality of polymer layers contained within said pockets, said polymer layers formed by dropping at least one liquid substance into each of said defined pockets and allowing said at least one liquid substance to dry therein;
- and
- an upper electrode layer patterned above said polymer layers, said upper and lower electrode layers conducting electrical energy to said plurality of polymer layers causing at least one of said polymer layers to emit light thereby.
2 more elements
Dependencies are inferred from the claim text.