# US 11,112,549 B2 · Polarizer, display panel including the same and method of manufacturing the same

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- Number: US 11,112,549 B2
- Document ID: US11112549B2
- Status: Granted
- Kind: B2
- Application number: 16/261,722
- Filed: 2019-01-30
- Published: 2019-05-30
- Granted: 2021-09-07
- Earliest claimed: 2014-10-29
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co, Ltd.
- Inventors: Kang-Soo Han; Eun-Jung Kim; Gug-Rae Jo; Hyung-Bin Cho
- Web page: https://patentgrep.com/patent/US11112549B2

## CPC

- G02B 5/3058: {comprising electrically conductive elements, e.g. wire grids, conductive particles}
- G02F 1/133548: {Wire-grid polarisers}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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

## Abstract

A polarizer includes a buffer member and linear metal patterns. The buffer member includes protrusions. Each protrusion has downwardly-increasing width. The buffer member is formed of polymer. The linear metal patterns, spaced apart from each other, are extended in a first direction. Each linear metal pattern covers a respective protrusion.

## Claims

### Claim 1

A method of manufacturing a polarizer, the method comprising:
forming a polymer layer and a metal layer, wherein the metal layer is formed on the polymer layer; and
forming a plurality of linear metal patterns from the metal layer and a plurality of protrusions from the polymer layer, by pressing a bottom surface of a mold against the metal layer and the polymer layer, the bottom surface having a plurality of pressing patterns spaced apart from one another to form a groove between each pair of the pressing patterns,
wherein at least a portion of each protrusion is inserted into a respective one of the linear metal patterns as a result of the pressing,
wherein forming the polymer layer comprises:
forming a first polymer layer on a substrate having a softening point equal to or less than about 50° C.; and
forming a second polymer layer having a softening point equal to or more than about 100° C., on the first polymer layer, the second polymer layer contacting the metal layer,
wherein the first polymer layer has a rubber phase at room temperature and the second polymer layer has a solid phase at room temperature.

### Claim 2 (depends on 1)

The method of claim 1, wherein the polymer layer includes at least one of polymethylmethacrylate, polydimethyl siloxane, polycarbonate, polyethylene terephthalate, polystyrene, polyethylene, polypropylene, polyvinylalcohol and a copolymer thereof.

### Claim 3 (depends on 1)

The method of claim 1, wherein the metal layer includes at least one of aluminum, gold, silver, copper, chromium, iron, nickel, titanium, molybdenum, tungsten and an alloy thereof.

### Claim 4 (depends on 1)

The method of claim 1, wherein the mold includes a material having a surface hardness higher than the metal layer.

### Claim 5 (depends on 1)

The method of claim 1, wherein the groove has slanted opposing sides.

### Claim 6 (depends on 1)

The method of claim 1, wherein a cross-section of a region of the mold including the pressing patterns has a tapered shape so that a width of an upper end is greater than a width of a lower end.

### Claim 7 (depends on 1)

The method of claim 1, wherein the first polymer layer includes at least one of polydimethyl siloxane and a copolymer thereof, and the second polymer layer includes at least one of polycarbonate, polyethylene terephthalate and a copolymer thereof.

### Claim 8 (depends on 1)

The method of claim 1, wherein during the pressing, further comprising heating the second polymer layer to a temperature corresponding to the softening point of the second polymer layer to cause the second polymer layer to enter the rubber phase.

### Claim 9 (depends on 8)

The method of claim 8, further comprising reducing the heating to cause the second polymer layer to enter the solid phase after removing the mold.

### Claim 10 (depends on 1)

The method of claim 1, wherein the linear metal patterns are connected to each other by remaining portions of the metal layer after the pressing of the metal layer.

### Claim 11 (depends on 10)

The method of claim 10, further comprising performing an etching on the remaining portions until the linear metal patterns are no longer connected to each other.

### Claim 12 (depends on 10)

The method of claim 10, wherein the remaining portions are thinner than the linear metal patterns.

### Claim 13 (depends on 10)

The method of claim 10, wherein the remaining portions are thinner than the protrusions.