# US 9,520,410 B2 · Display device and method for manufacturing the same

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- Number: US 9,520,410 B2
- Document ID: US9520410B2
- Status: Granted
- Kind: B2
- Application number: 14/446,934
- Filed: 2014-07-30
- Published: 2014-11-13
- Granted: 2016-12-13
- Earliest claimed: 2004-07-30
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Shunpei Yamazaki; Satoshi Murakami; Motomu Kurata; Hiroyuki Hata; Mitsuhiro Ichijo; Takashi Ohtsuki; Aya Anzai; Masayuki Sakakura
- Web page: https://patentgrep.com/patent/US9520410B2

## CPC

- H10D 86/441: {Interconnections, e.g. scanning lines}
- G06F 3/02: Input arrangements using manually operated switches, e.g. using keyboards or dials
- H04N 5/642: {Disposition of sound reproducers}
- H04N 5/655: Construction or mounting of chassis, e.g. for varying the elevation of the tube
- H10D 86/00: Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D 86/40: characterised by multiple TFTs
- H10D 86/421: {having a particular composition, shape or crystalline structure of the active layer}
- H10D 86/451: {characterised by the compositions or shapes of the interlayer dielectrics}
- H10D 86/60: wherein the TFTs are in active matrices
- H10H 20/856: Reflecting means
- H10K 59/124: Insulating layers formed between TFT elements and OLED elements
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants}
- H10K 59/1201: {Manufacture or treatment}
- H10K 71/135: {using ink-jet printing}
- H10K 71/421: {using coherent electromagnetic radiation, e.g. laser annealing}
- H10K 2102/3031: {Two-side emission, e.g. transparent OLEDs [TOLED]}
- H10W 72/5363: {the connected ends being wedge-shaped}
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

The present invention provides a method for manufacturing a highly reliable display device at a low cost with high yield. According to the present invention, a step due to an opening in a contact is covered with an insulating layer to reduce the step, and is processed into a gentle shape. A wiring or the like is formed to be in contact with the insulating layer and thus the coverage of the wiring or the like is enhanced. In addition, deterioration of a light-emitting element due to contaminants such as water can be prevented by sealing a layer including an organic material that has water permeability in a display device with a sealing material. Since the sealing material is formed in a portion of a driver circuit region in the display device, the frame margin of the display device can be narrowed.

## Claims

### Claim 1

A display module comprising:
a pixel region, a wiring region and an external terminal connection region,
the pixel region comprising:
a transistor including a semiconductor region, a gate insulating layer, a gate electrode, a source electrode and a drain electrode;
an interlayer insulating layer over the source electrode and the drain electrode;
a first electrode over the interlayer insulating layer, wherein the first electrode is electrically connected with one of the source electrode and the drain electrode, and wherein the first electrode includes a reflective metal layer and a transparent conductive film over and in contact with the reflective metal layer;
an insulator partly overlapping the first electrode;
an electroluminescent layer over the first electrode and the insulator;
a second electrode over the electroluminescent layer and the insulator; and
the wiring region comprising:
a first wiring over and in direct contact with a same layer on which the source electrode and the drain electrode are formed; and
a sealing material in direct contact with the first wiring;
the external terminal connection region comprising:
a terminal electrode over and in direct contact with the same layer on which the source electrode and the drain electrode are formed;
an anisotropic conductive layer in direct contact with the terminal electrode; and
a flexible printed circuit in direct contact with the anisotropic conductive layer.

### Claim 2 (depends on 1)

The display module according to claim 1, wherein the sealing material contains a resin.

### Claim 3 (depends on 1)

The display module according to claim 1, wherein the same layer is a silicon oxynitride layer.

### Claim 4 (depends on 1)

The display module according to claim 1, wherein the reflective metal layer includes one of Ta, W, Ti, Mo, Al, and Cu.

### Claim 5 (depends on 1)

The display module according to claim 1, wherein a cross-sectional width of the transparent conductive film is larger than a cross-sectional width of the reflective metal layer.

### Claim 6 (depends on 1)

The display module according to claim 1, further comprising a connection region between the pixel region and the wiring region, wherein the second electrode is in direct contact with a second wiring through an opening, and wherein the second wiring is over and in direct contact with the same layer on which the source electrode and the drain electrode are formed.

### Claim 7 (depends on 1)

The display module according to claim 1, wherein the second electrode includes one of MgAg, MgIn, AlLi, CaF2, and CaN.

### Claim 8 (depends on 1)

The display module according to claim 1, wherein the display module is incorporated in a chassis of one selected from the group consisting of a television device, a computer, an image reproducing device, a cellular phone, and a video camera.

### Claim 9

A display module comprising:
a pixel region, a wiring region and an external terminal connection region,
the pixel region comprising:
a transistor including a semiconductor region, a gate insulating layer, a gate electrode, a source electrode and a drain electrode;
an interlayer insulating layer over the source electrode and the drain electrode;
a first electrode over the interlayer insulating layer, wherein the first electrode is electrically connected with one of the source electrode and the drain electrode, and wherein the first electrode includes a reflective metal layer and a transparent conductive film over and in contact with the reflective metal layer;
an insulator partly overlapping the first electrode;
an electroluminescent layer over the first electrode and the insulator;
a second electrode over the electroluminescent layer and the insulator; and
the wiring region comprising:
a first wiring over and in direct contact with a same layer on which the source electrode and the drain electrode are formed; and
a sealing material in direct contact with the first wiring, wherein the sealing material does not overlap the insulator;
the external terminal connection region comprising:
a terminal electrode over and in direct contact with the same layer on which the source electrode and the drain electrode are formed;
an anisotropic conductive layer in direct contact with the terminal electrode; and
a flexible printed circuit in direct contact with the anisotropic conductive layer.

### Claim 10 (depends on 9)

The display module according to claim 9, wherein the sealing material contains a resin.

### Claim 11 (depends on 9)

The display module according to claim 9, wherein the same layer is a silicon oxynitride layer.

### Claim 12 (depends on 9)

The display module according to claim 9, wherein the reflective metal layer includes one of Ta, W, Ti, Mo, Al, and Cu.

### Claim 13 (depends on 9)

The display module according to claim 9, wherein a cross-sectional width of the transparent conductive film is larger than a cross-sectional width of the reflective metal layer.

### Claim 14 (depends on 9)

The display module according to claim 9, further comprising a connection region between the pixel region and the wiring region, wherein the second electrode is in direct contact with a second wiring through an opening, and wherein the second wiring is over and in direct contact with the same layer on which the source electrode and the drain electrode are formed.

### Claim 15 (depends on 9)

The display module according to claim 9, wherein the second electrode includes one of MgAg, MgIn, AlLi, CaF?, and CaN.

### Claim 16 (depends on 9)

The display module according to claim 9, wherein the display module is incorporated in a chassis of one selected from the group consisting of a television device, a computer, an image reproducing device, a cellular phone, and a video camera.