# US 11,908,985 B2 · Display device and method of manufacturing the same

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- Number: US 11,908,985 B2
- Document ID: US11908985B2
- Status: Granted
- Kind: B2
- Application number: 17/179,808
- Filed: 2021-02-19
- Published: 2021-08-26
- Granted: 2024-02-20
- Earliest claimed: 2020-02-20
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., LTD.
- Inventors: Dae Geun Lee; Joon Sam Kim; Suk Ho Choi
- Web page: https://patentgrep.com/patent/US11908985B2

## CPC

- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels}
- G02F 1/13458: {Terminal pads}
- H10H 20/01: Manufacture or treatment
- H10H 20/831: characterised by their shape
- H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout}
- H10H 20/0364: {of interconnections}
- H10W 72/072: {of bump connectors}
- H10W 72/07231: {Techniques}
- H10W 72/07232: {Compression bonding, e.g. thermocompression bonding}
- H10W 72/07233: {Ultrasonic bonding, e.g. thermosonic bonding}
- H10W 72/07252: {changes in structures or sizes}
- H10W 72/221: {Structures or relative sizes}
- H10W 72/252: {comprising solid metals or solid metalloids, e.g. PbSn, Ag or Cu}
- H10W 80/314: {characterized by direct bonding of pads or other interconnections}
- H10W 90/724: {between a chip and a stacked insulating package substrate, interposer or RDL}
- H10W 99/00: Subject matter not provided for in other groups of this subclass
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

A display device may include a display panel including a pad disposed on a substrate and a driving unit including a bump electrically connected to the pad. The pad may include a first layer disposed on the substrate and including a conductive material, a second layer disposed on the first layer and including patterns arranged in a first direction and spaced apart from each other, and a third layer disposed on the second layer and including a conductive material. The first layer may include portions protruding toward the substrate and respectively corresponding to the patterns.

## Claims

### Claim 1

A display device, comprising:
an insulation layer disposed on a substrate;
a display panel including a pad disposed on the insulation layer; and
a driving unit including a bump electrically connected to the pad,
wherein the pad includes:
a first layer disposed directly on a surface of the insulation layer, the first layer including a conductive material;
a second layer disposed on the first layer, the second layer including a plurality of patterns arranged in a first direction and spaced apart from each other; and
a third layer disposed on the second layer, the third layer including a conductive material, and
wherein
the surface of the insulation layer includes first surface portions and second surface portions lower than the first surface portions, and
the first layer includes portions protruding toward the substrate at the second surface portions of the surface of the insulation layer and respectively corresponding to the plurality of patterns.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the second layer includes an insulation material.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the second layer includes at least one of silicon nitride, silicon oxide, and silicon oxynitride.

### Claim 4 (depends on 1)

The display device of claim 1, wherein the second layer includes a conductive material.

### Claim 5 (depends on 4)

The display device of claim 4, wherein the second layer includes at least one of molybdenum (Mo) and copper (Cu).

### Claim 6 (depends on 1)

The display device of claim 1, wherein a width of each of the plurality of patterns in the first direction is greater than or equal to about 3 μm.

### Claim 7 (depends on 1)

The display device of claim 1, wherein widths of the plurality of patterns in the first direction are equal to each other.

### Claim 8 (depends on 1)

The display device of claim 1, wherein a width of each of the plurality of patterns in a second direction intersecting the first direction is equal to a width of the first layer in the second direction.

### Claim 9 (depends on 1)

The display device of claim 1, wherein widths of the plurality of patterns in a second direction intersecting the first direction are equal to each other.

### Claim 10 (depends on 1)

The display device of claim 1, wherein a gap between adjacent patterns of the plurality of patterns in the first direction is greater than or equal to a width of each of the plurality of patterns in the first direction.

### Claim 11 (depends on 1)

The display device of claim 1, wherein a thickness of the second layer is in a range from about 1000 Å to about 10000 Å.

### Claim 12 (depends on 1)

The display device of claim 1, wherein the third layer includes at least one of aluminum (Al), titanium (Ti), and copper (Cu).

### Claim 13 (depends on 1)

The display device of claim 1, further comprising:
a connection layer electrically connecting the bump to the pad and including a mixture of a material of the pad and a material of the bump.

### Claim 14 (depends on 1)

The display device of claim 1, further comprising a transistor including:
an active layer disposed on the substrate,
a gate electrode disposed on the active layer,
an insulation interlayer disposed on the gate electrode, and
a source-drain electrode disposed on the insulation interlayer and electrically connected to the active layer.

### Claim 15 (depends on 14)

The display device of claim 14, wherein
the first layer and the gate electrode are disposed on a same layer,
the second layer and the insulation interlayer are disposed on a same layer,
the third layer and the source-drain electrode are disposed on a same layer, and
the first layer, the second layer, and the third layer are disposed on different layers.

### Claim 16 (depends on 14)

The display device of claim 14, further comprising a capacitor including:
the gate electrode; and
a capacitor electrode disposed between the gate electrode and the insulation interlayer.

### Claim 17 (depends on 16)

The display device of claim 16, wherein
the first layer and the gate electrode are disposed on a same layer,
the second layer and the capacitor electrode are disposed on a same layer,
the third layer and the source-drain electrode are disposed on a same layer, and
the first layer, the second layer, and the third layer are disposed on different layers.

### Claim 18 (depends on 1)

The display device of claim 1, wherein the portions of the first layer protruding toward the substrate are visually recognizable.

### Claim 19 (depends on 1)

The display device of claim 1, wherein the portions of the first layer protruding toward the substrate do not extend to another layer below the insulation layer.