Patent
US 9,879,168of Invention
Junichi Tatami
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 9,879,168Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1]
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for producing hexagonal boron nitride, comprising a heating step of heating a mixture containing boron carbide and an alkaline earth metal compound under an ammonia atmosphere at 1300-1500 0 C to obtain a product containing hexagonal boron nitride, wherein a molar ratio of the boron carbide to the alkaline earth metal compound in the mixture is 0.5-2.0, wherein the alkaline earth metal compound is at least one selected from the group consisting of calcium carbonate, strontium carbonate, and barium carbonate, and wherein a graphitization index (GI) of the hexagonal boron nitride is 4.3 or less. Currently amended
The method for producing hexagonal boron nitride according to claim 1, further comprising a purification step of removing a solution containing a different compound from the hexagonal boron nitride from a suspension obtained by mixing the product and a washing liquid containing an acid to obtain a solid product containing the hexagonal boron nitride. Previously presented
The method for producing hexagonal boron nitride according to claim 1, wherein a mean particle size of the hexagonal boron nitride is 0.1-300 pm. Previously presented
A heat dissipation sheet comprising the hexagonal boron nitride obtained by the production method according to claim 1 and at least one of a resin and a rubber. Withdrawn
The method for producing hexagonal boron nitride according to claim 1, wherein a mean particle size of the hexagonal boron nitride is 38-300 pm. Previously presented
A method for producing hexagonal boron nitride according to claim 1, wherein the alkaline earth metal compound has a particle size of 100 p m or less. New
Canceled
Layer stacks claimed or described, ordered top of device to substrate.
heat dissipation sheet
Materials described outside the worked examples.
hexagonal boron nitride
h-BN
boron carbide
B₄C
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
GI of hexagonal boron nitride | ≤ 4.3 | h-BN |
mean particle size of hexagonal boron nitride (claim 4) | 0.1–300 μm |
Table 1
20 FP₁₄-0756- 00
ratios of the boron carbide powder and the alkaline earth metal compound, and heating conditions are shown in Table 1, and 12 types of heated products and final products of Examp
p. 11
Patent
Atlas literature
Patent
US 9,879,168Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1]
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for producing hexagonal boron nitride, comprising a heating step of heating a mixture containing boron carbide and an alkaline earth metal compound under an ammonia atmosphere at 1300-1500 0 C to obtain a product containing hexagonal boron nitride, wherein a molar ratio of the boron carbide to the alkaline earth metal compound in the mixture is 0.5-2.0, wherein the alkaline earth metal compound is at least one selected from the group consisting of calcium carbonate, strontium carbonate, and barium carbonate, and wherein a graphitization index (GI) of the hexagonal boron nitride is 4.3 or less. Currently amended
The method for producing hexagonal boron nitride according to claim 1, further comprising a purification step of removing a solution containing a different compound from the hexagonal boron nitride from a suspension obtained by mixing the product and a washing liquid containing an acid to obtain a solid product containing the hexagonal boron nitride. Previously presented
The method for producing hexagonal boron nitride according to claim 1, wherein a mean particle size of the hexagonal boron nitride is 0.1-300 pm. Previously presented
A heat dissipation sheet comprising the hexagonal boron nitride obtained by the production method according to claim 1 and at least one of a resin and a rubber. Withdrawn
The method for producing hexagonal boron nitride according to claim 1, wherein a mean particle size of the hexagonal boron nitride is 38-300 pm. Previously presented
A method for producing hexagonal boron nitride according to claim 1, wherein the alkaline earth metal compound has a particle size of 100 p m or less. New
Canceled
Layer stacks claimed or described, ordered top of device to substrate.
heat dissipation sheet
Materials described outside the worked examples.
hexagonal boron nitride
h-BN
boron carbide
B₄C
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
GI of hexagonal boron nitride | ≤ 4.3 | h-BN |
mean particle size of hexagonal boron nitride (claim 4) | 0.1–300 μm |
Table 1
20 FP₁₄-0756- 00
ratios of the boron carbide powder and the alkaline earth metal compound, and heating conditions are shown in Table 1, and 12 types of heated products and final products of Examp
p. 11
Patent
Atlas literature
Patent
US 9,879,168Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1]
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for producing hexagonal boron nitride, comprising a heating step of heating a mixture containing boron carbide and an alkaline earth metal compound under an ammonia atmosphere at 1300-1500 0 C to obtain a product containing hexagonal boron nitride, wherein a molar ratio of the boron carbide to the alkaline earth metal compound in the mixture is 0.5-2.0, wherein the alkaline earth metal compound is at least one selected from the group consisting of calcium carbonate, strontium carbonate, and barium carbonate, and wherein a graphitization index (GI) of the hexagonal boron nitride is 4.3 or less. Currently amended
The method for producing hexagonal boron nitride according to claim 1, further comprising a purification step of removing a solution containing a different compound from the hexagonal boron nitride from a suspension obtained by mixing the product and a washing liquid containing an acid to obtain a solid product containing the hexagonal boron nitride. Previously presented
The method for producing hexagonal boron nitride according to claim 1, wherein a mean particle size of the hexagonal boron nitride is 0.1-300 pm. Previously presented
A heat dissipation sheet comprising the hexagonal boron nitride obtained by the production method according to claim 1 and at least one of a resin and a rubber. Withdrawn
The method for producing hexagonal boron nitride according to claim 1, wherein a mean particle size of the hexagonal boron nitride is 38-300 pm. Previously presented
A method for producing hexagonal boron nitride according to claim 1, wherein the alkaline earth metal compound has a particle size of 100 p m or less. New
Canceled
Layer stacks claimed or described, ordered top of device to substrate.
heat dissipation sheet
Materials described outside the worked examples.
hexagonal boron nitride
h-BN
boron carbide
B₄C
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
GI of hexagonal boron nitride | ≤ 4.3 | h-BN |
mean particle size of hexagonal boron nitride (claim 4) | 0.1–300 μm |
Table 1
20 FP₁₄-0756- 00
ratios of the boron carbide powder and the alkaline earth metal compound, and heating conditions are shown in Table 1, and 12 types of heated products and final products of Examp
p. 11
Patent
Atlas literature
Patent
US 9,879,168Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1]
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for producing hexagonal boron nitride, comprising a heating step of heating a mixture containing boron carbide and an alkaline earth metal compound under an ammonia atmosphere at 1300-1500 0 C to obtain a product containing hexagonal boron nitride, wherein a molar ratio of the boron carbide to the alkaline earth metal compound in the mixture is 0.5-2.0, wherein the alkaline earth metal compound is at least one selected from the group consisting of calcium carbonate, strontium carbonate, and barium carbonate, and wherein a graphitization index (GI) of the hexagonal boron nitride is 4.3 or less. Currently amended
The method for producing hexagonal boron nitride according to claim 1, further comprising a purification step of removing a solution containing a different compound from the hexagonal boron nitride from a suspension obtained by mixing the product and a washing liquid containing an acid to obtain a solid product containing the hexagonal boron nitride. Previously presented
The method for producing hexagonal boron nitride according to claim 1, wherein a mean particle size of the hexagonal boron nitride is 0.1-300 pm. Previously presented
A heat dissipation sheet comprising the hexagonal boron nitride obtained by the production method according to claim 1 and at least one of a resin and a rubber. Withdrawn
The method for producing hexagonal boron nitride according to claim 1, wherein a mean particle size of the hexagonal boron nitride is 38-300 pm. Previously presented
A method for producing hexagonal boron nitride according to claim 1, wherein the alkaline earth metal compound has a particle size of 100 p m or less. New
Canceled
Layer stacks claimed or described, ordered top of device to substrate.
heat dissipation sheet
Materials described outside the worked examples.
hexagonal boron nitride
h-BN
boron carbide
B₄C
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
GI of hexagonal boron nitride | ≤ 4.3 | h-BN |
mean particle size of hexagonal boron nitride (claim 4) | 0.1–300 μm |
Table 1
20 FP₁₄-0756- 00
ratios of the boron carbide powder and the alkaline earth metal compound, and heating conditions are shown in Table 1, and 12 types of heated products and final products of Examp
p. 11
calcium carbonate
CaCO₃
strontium carbonate
SrCO₃
barium carbonate
BaCO₃
resin and/or rubber
mean particle size of hexagonal boron nitride (claim 6) | 38–300 μm | h-BN |
particle size of alkaline earth metal compound (claim 7) | ≤ 100 μm | B₄C |
calcium carbonate
CaCO₃
strontium carbonate
SrCO₃
barium carbonate
BaCO₃
resin and/or rubber
mean particle size of hexagonal boron nitride (claim 6) | 38–300 μm | h-BN |
particle size of alkaline earth metal compound (claim 7) | ≤ 100 μm | B₄C |
calcium carbonate
CaCO₃
strontium carbonate
SrCO₃
barium carbonate
BaCO₃
resin and/or rubber
mean particle size of hexagonal boron nitride (claim 6) | 38–300 μm | h-BN |
particle size of alkaline earth metal compound (claim 7) | ≤ 100 μm | B₄C |
calcium carbonate
CaCO₃
strontium carbonate
SrCO₃
barium carbonate
BaCO₃
resin and/or rubber
mean particle size of hexagonal boron nitride (claim 6) | 38–300 μm | h-BN |
particle size of alkaline earth metal compound (claim 7) | ≤ 100 μm | B₄C |