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US 12,336,063 B2Granted
Inorganic TFEL display element and manufacturing method
AssigneeLumineq Oy
InventorJani Holopainen
Life of this patent
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Abstract
An inorganic thin film electroluminescent display element having a layer structure comprising: a first dielectric layer, a luminescent layer, comprising a luminescent material, on the first dielectric layer, and a second dielectric layer on the luminescent layer. Each of the first and the second dielectric layers comprises nanolaminate with alternating aluminum oxide Al2O3 and hafnium oxide HfO2 sub-layers, the nanolaminate having at least two sub-layers of both types and a thickness of less than or equal to 300 nm.
Claims13
An inorganic thin film electroluminescent display element having a layer structure comprising:
- a first dielectric layer;
- a luminescent layer comprising a luminescent material on the first dielectric layer;
- and
- a second dielectric layer on the luminescent layer,
- wherein each of the first and the second dielectric layers comprises nanolaminate with alternating aluminum oxide Al2O3 and hafnium oxide HfO2 sub-layers, the nanolaminate having at least two sub-layers of both types,
- wherein the nanolaminate of at least one of the dielectric layers comprises at least ten HfO2 sub-layers each having a thickness in a range of 0.5 to 3 nm.
3 more elements
Dependencies are inferred from the claim text.