# US 9,437,819 B2 · Donor substrate and method for forming transfer pattern using the same

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- Number: US 9,437,819 B2
- Document ID: US9437819B2
- Status: Granted
- Kind: B2
- Application number: 14/791,635
- Filed: 2015-07-06
- Published: 2016-01-21
- Granted: 2016-09-06
- Earliest claimed: 2013-05-28
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: YoungGil Kwon
- Web page: https://patentgrep.com/patent/US9437819B2

## CPC

- B41M 5/42: Intermediate, {backcoat}, or covering layers {(B41M5/405 takes precedence; multilayer thermal transfer systems in general B41M5/38214)}
- B41M 5/44: characterised by the macromolecular compounds
- B41M 5/446: {Fluorine-containing polymers}
- B41M 5/46: characterised by the light-to-heat converting means; characterised by the heat or radiation filtering or absorbing means or layers
- B41M 5/465: {Infrared radiation-absorbing materials, e.g. dyes, metals, silicates, C black}
- H10K 71/18: using non-liquid printing techniques, e.g. thermal transfer printing from a donor sheet
- B41M 2205/02: Dye diffusion thermal transfer printing (D2T2)
- B41M 2205/30: Thermal donors, e.g. thermal ribbons
- B41M 2205/38: Intermediate layers; Layers between substrate and imaging layer
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 50/15: Hole transporting layers
- H10K 50/16: Electron transporting layers
- H10K 50/17: Carrier injection layers
- H10K 50/171: {Electron injection layers}
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A donor substrate includes a base layer, a light-to-heat conversion layer disposed on the base layer, a buffer layer disposed on the light-to-heat conversion layer and a transfer layer disposed on the buffer layer. The buffer layer includes a cross-linked polymer, a spacer polymer bonded to the cross-linked polymer, and a perfluoroalkyl alcohol group bonded to the spacer polymer.

## Claims

### Claim 1

A donor substrate comprising:
a base layer;
a light-to-heat conversion layer disposed on the base layer;
a buffer layer disposed on the light-to-heat conversion layer, the buffer layer including a cross-linked polymer, a spacer polymer bonded to the cross-linked polymer, and a perfluoroalkyl alcohol group bonded to the spacer polymer; and
a transfer layer disposed on the buffer layer,
wherein a surface of the buffer layer has hydrophobic properties, and
wherein the transfer layer is attached to the surface having hydrophobic properties.

### Claim 2 (depends on 1)

The donor substrate of claim 1,
wherein the spacer polymer has a following Chemical Formula 2,
wherein in the Chemical Formula, y is 1 to 10.

### Claim 3 (depends on 2)

The donor substrate of claim 2,
wherein a number of carbon atoms bonding with fluorine in the perfluoroalkyl alcohol group is 3 to 20.

### Claim 4 (depends on 2)

The donor substrate of claim 2,
wherein the perfluoroalkyl alcohol group is 2-(perfluorooctyl)ethanol.

### Claim 5

A method for forming a transfer pattern, comprising:
disposing a donor substrate comprising a base layer, a light-to-heat conversion layer disposed on the base layer, a buffer layer disposed on the light-to-heat conversion layer and including a cross-linked polymer, a spacer polymer bonded to the cross-linked polymer, and a perfluoroalkyl alcohol group bonded to the spacer polymer, and a transfer layer disposed on the buffer layer, on a transcription substrate to make a contact between the transfer layer and the transcription substrate, wherein a surface of the buffer layer has hydrophobic properties, and the transfer layer attached to the surface having hydrophobic properties;
exposing the donor substrate to transfer the transfer pattern onto the transcription substrate; and
removing the donor substrate from the transcription substrate.

### Claim 6 (depends on 5)

The method for forming a transfer pattern of claim 5,
wherein the spacer polymer has a following Chemical Formula 2,
wherein in the Chemical Formula, y is 1 to 10.

### Claim 7 (depends on 5)

The method for forming a transfer pattern of claim 5,
wherein the transcription substrate constitutes a portion of an organic light emitting display substrate.

### Claim 8 (depends on 7)

The method for forming a transfer pattern of claim 7,
wherein the organic light emitting display substrate includes an organic light emitting device, and the transfer pattern constitutes a portion of the organic light emitting device.

### Claim 9 (depends on 5)

The method for forming a transfer pattern of claim 5,
wherein a number of carbon atoms bonding with fluorine in the perfluoroalkyl alcohol group is 3 to 20.

### Claim 10 (depends on 9)

The method for forming a transfer pattern of claim 9,
wherein the perfluoroalkyl alcohol group is 2-(perfluorooctyl)ethanol.

### Claim 11 (depends on 5)

The method of claim 5,
wherein the exposing of the donor substrate comprises exposing the donor substrate to a light to transfer the transfer pattern onto the base substrate.

### Claim 12 (depends on 11)

The method of claim 11,
wherein the light comprises one of ultraviolet light or visible light.

### Claim 13 (depends on 11)

The method of claim 11,
wherein the light comprises a laser beam having a constant wavelength.

### Claim 14 (depends on 11)

The method of claim 11,
wherein only a portion of the donor substrate is exposed to the light.

### Claim 15 (depends on 11)

The method of claim 11,
wherein substantially the entire donor substrate is exposed to the light.

### Claim 16

A method for forming a transfer pattern on an organic light emitting display substrate, comprising:
disposing a donor substrate comprising a base layer, a light-to-heat conversion layer disposed on the base layer, a buffer layer disposed on the light-to-heat conversion layer and including a cross-linked polymer, a spacer polymer bonded to the cross-linked polymer, and a perfluoroalkyl alcohol group bonded to the spacer polymer, and a transfer layer disposed on the buffer layer, on a base substrate of the organic light emitting display substrate to make a contact between the transfer layer and the base substrate, wherein a surface of the buffer layer has hydrophobic properties and the transfer layer is attached to the surface having hydrophobic properties;
exposing the donor substrate to light to transfer the transfer pattern onto the base substrate, wherein the organic light emitting display substrate includes an organic light emitting device, and wherein the transfer pattern constitutes at least a portion of the organic light emitting device and includes at least one of a hole transporting layer, an organic light emitting layer, a hole injection layer and an electron injection layer; and
removing the donor substrate from the base substrate after forming the transfer pattern.

### Claim 17 (depends on 16)

The method for forming a transfer pattern on an organic light emitting display substrate of claim 16,
wherein only a portion of the donor substrate is exposed to the light and wherein the transfer pattern transferred onto the base substrate of the organic light emitting display substrate includes the hole transporting layer disposed on the base substrate and the organic light emitting layer disposed on the hole transporting layer.

### Claim 18 (depends on 16)

The method for forming a transfer pattern on an organic light emitting display substrate of claim 16,
wherein substantially the entire donor substrate is exposed to the light and wherein the transfer pattern transferred onto the base substrate of the organic light emitting display substrate includes the hole injection layer disposed on the base substrate, the hole transporting layer disposed on the hole injection layer, the organic light emitting layer disposed on the hole transporting layer and the electron injection layer disposed on the organic light emitting layer.