# US 12,113,157 B2 · Methods of modifying the composition of material layers

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- Number: US 12,113,157 B2
- Document ID: US12113157B2
- Status: Granted
- Kind: B2
- Application number: 18/198,005
- Filed: 2023-05-16
- Published: 2023-10-12
- Granted: 2024-10-08
- Earliest claimed: 2018-10-26
- Assignees: Tectus Corporation
- Applicants: Tectus Corporation
- Inventors: Hongjin Jiang; William Freeman
- Web page: https://patentgrep.com/patent/US12113157B2

## CPC

- H10H 20/8512: {Wavelength conversion materials}
- H10H 20/8516: {having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer or wavelength conversion layer with a concentration gradient}
- H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout}
- H10H 20/0361: {of wavelength conversion means}
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS

## Abstract

Methods of modifying the composition of layers using selectively absorbing films are described. The composition of a layer can be modified by applying a selectively absorbing film in proximity to the applied coating and components of the layer can be selectively removed to provide a modified layers. The methods can be used to increase the concentration of particles in the layer.

## Claims

### Claim 1

A method of increasing the vol % of quantum dots in a first composition, comprising:
(a) applying a selectively absorbing film in proximity to the first composition, wherein the first composition comprises a first vol % of quantum dots and at least one additional component, wherein the first vol % of quantum dots is based on the total volume of the first composition; and
(b) modifying the first composition by causing the at least one additional component to absorb into the selectively absorbing film to provide a second composition, wherein,
the second composition comprises a second vol % of the quantum dots, wherein the second vol % of quantum dots is based on the total volume of the second composition; and
the second vol % is greater than the first vol %; and
the at least one additional component comprises an acrylate monomer.

### Claim 2 (depends on 1)

The method of claim 1, wherein modifying comprises extracting the at least one additional component from the first composition.

### Claim 3 (depends on 2)

The method of claim 2, wherein the at least one additional component comprises a low molecular weight component.

### Claim 4 (depends on 1)

The method of claim 1, wherein modifying comprises decreasing a volume of the first composition.

### Claim 5 (depends on 1)

The method of claim 1, wherein the first composition is in the form of a layer.

### Claim 6 (depends on 1)

The method of claim 1, wherein the first composition is disposed within a recess.

### Claim 7 (depends on 6)

The method of claim 6, wherein the recess has a depth from 1 μm to 10 μm and a width from 1 μm to 10 μm.

### Claim 8 (depends on 7)

The method of claim 7, wherein the recess has a depth that is greater than the width.

### Claim 9 (depends on 1)

The method of claim 1, wherein the first composition comprises:
a first concentration of a first component; and
the second composition comprises a second concentration of the first component,
wherein the second concentration is less than the first concentration.

### Claim 10 (depends on 1)

The method of claim 1, wherein,
the first composition has a first volume;
the second composition has a second volume; and
the second volume is less than the first volume.

### Claim 11 (depends on 1)

The method of claim 1, wherein,
the first composition comprises a first wt % of quantum dots, wherein the first wt % is based on the total weight of the first composition;
the second composition comprises a second wt % of quantum dots, wherein the second wt % is based on the total weight of the modified composition; and
the second wt % is greater than the first wt %.

### Claim 12 (depends on 1)

The method of claim 1, wherein the selectively absorbing film comprises a silicone polymer.

### Claim 13 (depends on 1)

The method of claim 1, wherein the selectively absorbing film comprises multiple layers.