US 7,745,991 B2Granted

Electro-optical device having an EL layer over a plurality of pixels

AssigneeSemiconductor Energy Laboratory Co., Ltd.

InventorsShunpei Yamazaki, Kunitaka Yamamoto, Yasuyuki Arai

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Abstract

The present invention aims to provide simple, high-speed processing for the formation of an EL layer by an ink-jet method. A method of manufacturing an electro-optical device having good operation performance and high reliability, and in particular, a method of manufacturing an EL display device, is provided. The present invention forms EL layers continuously across a plurality of pixels when the EL layers are formed by the ink-jet method. Specifically, with respect to m columns and n rows of pixel electrodes arranged in a matrix state, the EL layers are formed so as to form stripes with respect to one certain selected row or one column. The EL layers may also be formed having an oblong shape or a rectangular shape with respect to each pixel electrode.

Claims55

Dependent claims

A light-emitting device comprising:

a plurality of TFTs over a substrate;
a first passivation film over the plurality of TFTs;
a leveling film over the first passivation film;
a second passivation film over the leveling film;
a plurality of first pixel electrodes and a plurality of second pixel electrodes over the second passivation film, the plurality of first pixel electrodes and the plurality of second pixel electrodes each being connected to one of the plurality of TFTs;
a first separation layer, a second separation layer and a third separation layer each extending in a line over the second passivation film so that the plurality of first electrodes are arranged between the first separation layer and the second separation layer and the plurality of second electrodes are arranged between the second separation layer and the third separation layer;
a first EL layer over the plurality of first pixel electrodes, the first EL layer extending along the first separation layer and the second separation layer;
and
a second EL layer over the plurality of second pixel electrodes, the second EL layer extending along the second separation layer and the third separation layer,
wherein the first EL layer is formed to be continuous over the plurality of first pixel electrodes, and
wherein the second EL layer is formed to be continuous over the plurality of second pixel electrodes.

8 more elements

A light-emitting device comprising:

a plurality of TFTs over a substrate;
a first passivation film over the plurality of TFTs;
a leveling film over the first passivation film;
a second passivation film over the leveling film;
a plurality of first pixel electrodes and a plurality of second pixel electrodes over the second passivation film, the plurality of first pixel electrodes and the plurality of second pixel electrodes each being connected to one of the plurality of TFTs;
a first separation layer, a second separation layer and a third separation layer each extending in a line over the second passivation film so that the plurality of first electrodes are arranged between the first separation layer and the second separation layer and the plurality of second electrodes are arranged between the second separation layer and the third separation layer;
a first EL layer over the plurality of first pixel electrodes, the first EL layer extending along the first separation layer and the second separation layer;
and
a second EL layer over the plurality of second pixel electrodes, the second EL layer extending along the second separation layer and the third separation layer,
wherein the first EL layer is formed to be continuous over the plurality of first pixel electrodes and has an oblong shape or a rectangular shape corresponding to the plurality of first pixel electrodes, and
wherein the second EL layer is formed to be continuous over the plurality of second pixel electrodes and has an oblong shape or a rectangular shape corresponding to the plurality of second pixel electrodes.

8 more elements

A light-emitting device comprising:

a plurality of first TFTs over a substrate;
a plurality of second TFTs over the substrate;
a plurality of third TFTs over the substrate;
a first passivation film over the plurality of first TFTs, the plurality of second TFTs and the plurality of third TFTs;
a leveling film over the first passivation film;
a second passivation film over the leveling film;
a plurality of first pixel electrodes over the the second passivation film, the plurality of first pixel electrodes each being connected to one of the plurality of first TFTs;
a plurality of second pixel electrodes over the the second passivation film, the plurality of second pixel electrodes each being connected to one of the plurality of second TFTs;
a plurality of third pixel electrodes over the the second passivation film, the plurality of third pixel electrodes each being connected to one of the plurality of third TFTs;
a first separation layer, a second separation layer, a third separation layer and a fourth separation layer each extending in a line over the second passivation film so that the plurality of first electrodes are arranged between the first separation layer and the second separation layer, the plurality of second electrodes are arranged between the second separation layer and the third separation layer, and the plurality of third electrodes are arranged between the third separation layer and the fourth separation layer;
a first EL layer for emitting a red color light over the plurality of first pixel electrodes, the first EL layer extending along the first separation layer and the second separation layer;
a second EL layer for emitting a green color light over the plurality of second pixel electrodes, the second EL layer extending along the second separation layer and the third separation layer;
and
a third EL layer for emitting a blue color light over the plurality of third pixel electrodes, the third EL layer extending along the third separation layer and the fourth separation layer,
wherein the first EL layer is formed to be continuous over the plurality of first pixel electrodes,
wherein the second EL layer is formed to be continuous over the plurality of second pixel electrodes, and
wherein the third EL layer is formed to be continuous over the plurality of third pixel electrodes.

14 more elements

A light-emitting device comprising:

a plurality of first TFTs over a substrate;
a plurality of second TFTs over the substrate;
a plurality of third TFTs over the substrate;
a first passivation film over the plurality of first TFTs, the plurality of second TFTs and the plurality of third TFTs;
a leveling film over the first passivation film;
a second passivation film over the leveling film;
a plurality of first pixel electrodes over the the second passivation film, the plurality of first pixel electrodes each being connected to one of the plurality of first TFTs;
a plurality of second pixel electrodes over the the second passivation film, the plurality of second pixel electrodes each being connected to one of the plurality of second TFTs;
a plurality of third pixel electrodes over the the second passivation film, the plurality of third pixel electrodes each being connected to one of the plurality of third TFTs;
a first separation layer, a second separation layer, a third separation layer and a fourth separation layer each extending in a line over the second passivation film so that the plurality of first electrodes are arranged between the first separation layer and the second separation layer, the plurality of second electrodes are arranged between the second separation layer and the third separation layer, and the plurality of third electrodes are arranged between the third separation layer and the fourth separation layer;
a first EL layer for emitting a red color light over the plurality of first pixel electrodes, the first EL layer extending along the first separation layer and the second separation layer;
a second EL layer for emitting a green color light over the plurality of second pixel electrodes, the second EL layer extending along the second separation layer and the third separation layer;
and
a third EL layer for emitting a blue color light over the plurality of third pixel electrodes, the third EL layer extending along the third separation layer and the fourth separation layer,
wherein the first EL layer is formed to be continuous over the plurality of first pixel electrodes and has an oblong shape or a rectangular shape corresponding to the plurality of first pixel electrodes,
wherein the second EL layer is formed to be continuous over the plurality of second pixel electrodes and has an oblong shape or a rectangular shape corresponding to the plurality of second pixel electrodes,
wherein the third EL layer is formed to be continuous over the plurality of second pixel electrodes and has an oblong shape or a rectangular shape corresponding to the plurality of third pixel electrodes.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/885,953Filed 8 Jul 2004 · division
Priority: JP 11-29031412 Oct 1999
Published: US 2005/0035708 A117 Feb 2005
Granted: 29 Jun 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H10K 59/124
Active-matrix OLED [AMOLED] displays: insulating layers formed between TFT elements and OLED elements
H10K 71/135
Using printing techniques, e.g. ink-jet printing or screen printing: using ink-jet printing
H10D 30/6715
Characterised by the properties of the source or drain regions, e.g. compositions or sectional shapes: characterised by the doping profiles, e.g.…
H10D 30/6717
Characterised by the doping profiles, e.g. having lightly-doped source or drain extensions: the source and the drain regions being asymmetrical

Family

Application09/680,492Parent of this division · filed 6 Oct 2000
US 2005/0035708 A1Pre-grant publication · published 17 Feb 2005
US 6,830,494 B1Parent of this division
US 7,745,991 B2This patent

From the US filing history. Foreign family members aren’t listed.

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