US 9,793,329 B2Granted

Display device including light-emitting layer

AssigneeSemiconductor Energy Laboratory Co., Ltd.

InventorsKaoru Hatano, Satoshi Seo, Takaaki Nagata, Tatsuya Okano

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Abstract

It is an object to provide a flexible light-emitting device with long lifetime in a simple way and to provide an inexpensive electronic device with long lifetime using the flexible light-emitting device. A flexible light-emitting device is provided, which includes a substrate having flexibility and a light-transmitting property with respect to visible light; a first adhesive layer over the substrate; an insulating film containing nitrogen and silicon over the first adhesive layer; a light-emitting element including a first electrode, a second electrode facing the first electrode, and an EL layer between the first electrode and the second electrode; a second adhesive layer over the second electrode; and a metal substrate over the second adhesive layer, wherein the thickness of the metal substrate is 10 μm to 200 μm inclusive. Further, an electronic device using the flexible light-emitting device is provided.

Claims25

Dependent claims

A display device comprising:

a first film comprising a resin;
a second film over and in contact with the first film, the second film has a stacked structure comprising a silicon nitride layer between layers which each comprise a material represented by SiOxNy, where x is larger than y;
a semiconductor film over and in contact with the second film, the semiconductor film comprising polysilicon;
a gate insulating film over and in contact with the semiconductor film, the gate insulating film comprising a material represented by SiOxNy, where x is larger than y;
a gate electrode over and in contact with the gate insulating film, the gate electrode comprising a metal selected from W, Al, Ta, Mo, and Ti;
an insulating film over and in contact with the gate electrode, the insulating film comprising:
a first layer comprising a material represented by SiNyOx, where y is larger than x;
and
a second layer over the first layer, the second layer comprising a material represented by SiOxNy, where x is larger than y;
a source electrode and a drain electrode over the insulating film;
and
a light-emitting element electrically connected to one of the source electrode and the drain electrode, the light-emitting element comprising:
a first electrode comprising indium-tin-oxide;
a second electrode comprising Ag;
and
an EL layer between the first electrode and the second electrode.

13 more elements

A display device comprising:

a flexible substrate;
a first insulating layer over the flexible substrate;
a second insulating layer over the first insulating layer;
a third insulating layer over the second insulating layer;
a fourth insulating layer over the third insulating layer;
a semiconductor film over the fourth insulating layer;
a gate insulating film over the semiconductor film;
a gate electrode over the gate insulating film;
a fifth insulating layer over the gate electrode;
a sixth insulating layer over the fifth insulating layer;
a first conductive film over the sixth insulating layer, the first conductive film being electrically connected to the semiconductor film;
a second conductive film over the sixth insulating layer, the second conductive film being electrically connected to the semiconductor film;
a first electrode electrically connected to one of the first conductive film and the second conductive film;
a seventh insulating layer over the first electrode;
a light-emitting layer over the first electrode and the seventh insulating layer;
and
a second electrode over the light-emitting layer,
wherein oxygen content in the first insulating layer is larger than nitrogen content in the first insulating layer,
wherein nitrogen content in the second insulating layer is larger than oxygen content in the second insulating layer,
wherein nitrogen content in the third insulating layer is larger than oxygen content in the third insulating layer,
wherein oxygen content in the fourth insulating layer is larger than nitrogen content in the fourth insulating layer,
wherein oxygen content in the fifth insulating layer is larger than nitrogen content in the fifth insulating layer, and
wherein nitrogen content in the sixth insulating layer is larger than oxygen content in the sixth insulating layer.

20 more elements

A display device comprising:

a first insulating layer;
a second insulating layer over the first insulating layer;
a third insulating layer over the second insulating layer;
a fourth insulating layer over the third insulating layer;
a semiconductor film over the fourth insulating layer;
a gate insulating film over the semiconductor film;
a gate electrode over the gate insulating film;
a fifth insulating layer over the gate electrode;
a sixth insulating layer over the fifth insulating layer;
a first conductive film over the sixth insulating layer, the first conductive film being electrically connected to the semiconductor film;
a second conductive film over the sixth insulating layer, the second conductive film being electrically connected to the semiconductor film;
a first electrode electrically connected to one of the first conductive film and the second conductive film;
a seventh insulating layer over the first electrode;
a light-emitting layer over the first electrode and the seventh insulating layer;
and
a second electrode over the light-emitting layer,
wherein oxygen content in the first insulating layer is larger than nitrogen content in the first insulating layer,
wherein nitrogen content in the second insulating layer is larger than oxygen content in the second insulating layer,
wherein nitrogen content in the third insulating layer is larger than oxygen content in the third insulating layer,
wherein oxygen content in the fourth insulating layer is larger than nitrogen content in the fourth insulating layer,
wherein oxygen content in the fifth insulating layer is larger than nitrogen content in the fifth insulating layer,
wherein nitrogen content in the sixth insulating layer is larger than oxygen content in the sixth insulating layer, and
wherein the display device is configured to display in a state where the display device is curved.

20 more elements

A display device comprising:

a flexible substrate;
a first insulating layer over the flexible substrate;
a second insulating layer over the first insulating layer;
a third insulating layer over the second insulating layer;
a fourth insulating layer over the third insulating layer;
a fifth insulating layer over the fourth insulating layer;
a semiconductor film over the fifth insulating layer;
a gate insulating film over the semiconductor film;
a gate electrode over the gate insulating film;
a sixth insulating layer over the gate electrode;
a seventh insulating layer over the sixth insulating layer;
a first conductive film over the seventh insulating layer, the first conductive film being electrically connected to the semiconductor film;
a second conductive film over the seventh insulating layer, the second conductive film being electrically connected to the semiconductor film;
a first electrode electrically connected to one of the first conductive film and the second conductive film;
an eighth insulating layer over the first electrode;
a light-emitting layer over the first electrode and the eighth insulating layer;
and
a second electrode over the light-emitting layer,
wherein oxygen content in the first insulating layer is larger than nitrogen content in the first insulating layer,
wherein nitrogen content in the second insulating layer is larger than oxygen content in the second insulating layer,
wherein oxygen content in the third insulating layer is larger than nitrogen content in the third insulating layer,
wherein nitrogen content in the fourth insulating layer is larger than oxygen content in the fourth insulating layer,
wherein oxygen content in the fifth insulating layer is larger than nitrogen content in the fifth insulating layer,
wherein oxygen content in the sixth insulating layer is larger than nitrogen content in the sixth insulating layer, and
wherein nitrogen content in the seventh insulating layer is larger than oxygen content in the seventh insulating layer.

22 more elements

A display device comprising:

a first insulating layer;
a second insulating layer over the first insulating layer;
a third insulating layer over the second insulating layer;
a fourth insulating layer over the third insulating layer;
a fifth insulating layer over the fourth insulating layer;
a semiconductor film over the fifth insulating layer;
a gate insulating film over the semiconductor film;
a gate electrode over the gate insulating film;
a sixth insulating layer over the gate electrode;
a seventh insulating layer over the sixth insulating layer;
a first conductive film over the seventh insulating layer, the first conductive film being electrically connected to the semiconductor film;
a second conductive film over the seventh insulating layer, the second conductive film being electrically connected to the semiconductor film;
a first electrode electrically connected to one of the first conductive film and the second conductive film;
an eighth insulating layer over the first electrode;
a light-emitting layer over the first electrode and the eighth insulating layer;
and
a second electrode over the light-emitting layer,
wherein oxygen content in the first insulating layer is larger than nitrogen content in the first insulating layer,
wherein nitrogen content in the second insulating layer is larger than oxygen content in the second insulating layer,
wherein oxygen content in the third insulating layer is larger than nitrogen content in the third insulating layer,
wherein nitrogen content in the fourth insulating layer is larger than oxygen content in the fourth insulating layer,
wherein oxygen content in the fifth insulating layer is larger than nitrogen content in the fifth insulating layer,
wherein oxygen content in the sixth insulating layer is larger than nitrogen content in the sixth insulating layer,
wherein nitrogen content in the seventh insulating layer is larger than oxygen content in the seventh insulating layer, and
wherein the display device is configured to display in a state where the display device is curved.

22 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/212,633Filed 18 Jul 2016 · continuation
Priority: JP 2008-26777416 Oct 2008
Published: US 2016/0329389 A110 Nov 2016
Granted: 17 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification34 codes

H10D 86/40
Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless…
H10D 30/6732
Characterised by the shapes, relative sizes or dispositions of the gate electrodes: bottom-gate only TFTs
H10D 30/6745
Silicon: polycrystalline or microcrystalline silicon
H10D 86/0214
Of multiple TFTs: using temporary substrates

Family

Application12/578,687Parent of this continuation · filed 14 Oct 2009
Application13/480,693Parent of this continuation · filed 25 May 2012
US 8,188,474 B2Parent of this continuation · filed 29 May 2012
Application14/074,091Parent of this continuation · filed 7 Nov 2013
US 8,581,265 B2Parent of this continuation · filed 12 Nov 2013
Application14/585,963Parent of this continuation · filed 30 Dec 2014
US 9,117,976 B2Parent of this continuation · filed 25 Aug 2015
US 2016/0329389 A1Pre-grant publication · published 10 Nov 2016
US 9,401,458 B2Parent of this continuation
US 2010/0096633 A1Published application
US 2012/0241799 A1Published application
US 2014/0124796 A1Published application
US 2015/0108463 A1Published application
US 9,793,329 B2This patent

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