Patent
US 12,421,113 B2HEXAGONAL BORON NITRIDE FIBERS AND METHOD OF MANUFACTURING SAME
Hideki Yoshida
NICHIA CORPORATION, Anan (JP)·Sep. 23, 2025·US
Copyright © 2026 Matter42. All rights reserved.
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Atlas literature
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US 12,421,113 B2Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
FIG. 2 shows X-ray diffraction spectra of the hexagonal boron nitride fibers of Example 2, the boron nitride fibers of Comparative Example 1 and the hexagonal …
FIG. 3A.
FIG. 4 is a diagram showing the reflectivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example 2, and …
FIG. 5A.
FIG. 6 is a graph showing the thermal conductivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example …
FIG. 7 is a schematic perspective view showing the configuration of a light emitting device according to an embodiment of the present disclosure.
FIG. 8 is a schematic cross-sectional view taken along line VIII-VIII in
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
FIG. 1A shows the X-ray diffraction spectrum of the B₂ hexagonal boron nitride fibers of Example 2. FIG. 2 shows the X-ray diffraction spectrum of the hexagonal boron nitride fibers of Example 2, and that of the boron nitride fibers of Comparative Example 1 and Comparative Example
The hexagonal boron nitride fibers according to claim 1, wherein, in the diffraction peak, a ratio of a peak width at an intensity of 20% of a maximum peak intensity to a peak width at an intensity of 80% of the maximum peak intensity is 3.5 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average aspect ratio of the hexagonal boron nitride fibers is 1.5 or more and 150 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average fiber length of the hexagonal boron nitride fibers is 1 µm or greater and 100 µm or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average aspect ratio of the plate-like particles is greater than 1.0 and 200 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average major diameter of the plate-like particles is 0.1 µm or greater and 10 µm or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average thickness of the plate-like particles is 0.05 µm or greater and 5 µm or less. ∗ ∗ ∗ ∗ ∗
As shown in FIG. 1A, in the hexagonal boron nitride fibers of Example 2, the diffraction peak having the half-width of 0.62° considered to be attributed to the (0002) plane of hexagonal boron nitride was detected in the region where 2θ is around 26°. Further, as shown in FIG. 1B, the structure considered to be attributed to hexagonal boron nitride was detected in the region where 2θ is around 50°. As shown in FIG. 2, the boron nitride fibers of Comparative Example 1 and Comparative Example 2 exhibited broad diffraction peaks as compared to the hexagonal boron nitride fibers of What is claimed is:
The hexagonal boron nitride fibers according to claim 2, wherein, in the diffraction peak, a ratio of a peak width at an intensity of 20% of a maximum peak intensity to a peak width at an intensity of 80% of the maximum peak intensity is 3.5 or less.
Embodiments described in the patent, grouped by the materials and process steps they use.
1 material1 process step
Hexagonal boron nitride fibers of Example 2 were characterized by XRD. A diffraction peak with half-width of 0.62° attributed to the (0002) plane of hexagonal boron nitride was detected around 2θ=26°, and a structure attributed to hexagonal boron nitride was detected around 2θ=50°. Comparative Examples 1 and 2 exhibited broader diffraction peaks.
Materials described outside the worked examples.
melamine-based compound
boric acid
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
XRD FWHM of (0002) peak, Example 2 hBN fibers | 0.62 degrees (2θ) | BN |
XRD FWHM claimed upper limit for hBN fibers (claimed crystallinity criterion) |
Patents and literature cited by this patent (applicant and examiner references).
Cited patents · 10
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Patent
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US 12,421,113 B2Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
FIG. 2 shows X-ray diffraction spectra of the hexagonal boron nitride fibers of Example 2, the boron nitride fibers of Comparative Example 1 and the hexagonal …
FIG. 3A.
FIG. 4 is a diagram showing the reflectivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example 2, and …
FIG. 5A.
FIG. 6 is a graph showing the thermal conductivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example …
FIG. 7 is a schematic perspective view showing the configuration of a light emitting device according to an embodiment of the present disclosure.
FIG. 8 is a schematic cross-sectional view taken along line VIII-VIII in
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
FIG. 1A shows the X-ray diffraction spectrum of the B₂ hexagonal boron nitride fibers of Example 2. FIG. 2 shows the X-ray diffraction spectrum of the hexagonal boron nitride fibers of Example 2, and that of the boron nitride fibers of Comparative Example 1 and Comparative Example
The hexagonal boron nitride fibers according to claim 1, wherein, in the diffraction peak, a ratio of a peak width at an intensity of 20% of a maximum peak intensity to a peak width at an intensity of 80% of the maximum peak intensity is 3.5 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average aspect ratio of the hexagonal boron nitride fibers is 1.5 or more and 150 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average fiber length of the hexagonal boron nitride fibers is 1 µm or greater and 100 µm or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average aspect ratio of the plate-like particles is greater than 1.0 and 200 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average major diameter of the plate-like particles is 0.1 µm or greater and 10 µm or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average thickness of the plate-like particles is 0.05 µm or greater and 5 µm or less. ∗ ∗ ∗ ∗ ∗
As shown in FIG. 1A, in the hexagonal boron nitride fibers of Example 2, the diffraction peak having the half-width of 0.62° considered to be attributed to the (0002) plane of hexagonal boron nitride was detected in the region where 2θ is around 26°. Further, as shown in FIG. 1B, the structure considered to be attributed to hexagonal boron nitride was detected in the region where 2θ is around 50°. As shown in FIG. 2, the boron nitride fibers of Comparative Example 1 and Comparative Example 2 exhibited broad diffraction peaks as compared to the hexagonal boron nitride fibers of What is claimed is:
The hexagonal boron nitride fibers according to claim 2, wherein, in the diffraction peak, a ratio of a peak width at an intensity of 20% of a maximum peak intensity to a peak width at an intensity of 80% of the maximum peak intensity is 3.5 or less.
Embodiments described in the patent, grouped by the materials and process steps they use.
1 material1 process step
Hexagonal boron nitride fibers of Example 2 were characterized by XRD. A diffraction peak with half-width of 0.62° attributed to the (0002) plane of hexagonal boron nitride was detected around 2θ=26°, and a structure attributed to hexagonal boron nitride was detected around 2θ=50°. Comparative Examples 1 and 2 exhibited broader diffraction peaks.
Materials described outside the worked examples.
melamine-based compound
boric acid
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
XRD FWHM of (0002) peak, Example 2 hBN fibers | 0.62 degrees (2θ) | BN |
XRD FWHM claimed upper limit for hBN fibers (claimed crystallinity criterion) |
Patents and literature cited by this patent (applicant and examiner references).
Cited patents · 10
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 12,421,113 B2Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
FIG. 2 shows X-ray diffraction spectra of the hexagonal boron nitride fibers of Example 2, the boron nitride fibers of Comparative Example 1 and the hexagonal …
FIG. 3A.
FIG. 4 is a diagram showing the reflectivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example 2, and …
FIG. 5A.
FIG. 6 is a graph showing the thermal conductivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example …
FIG. 7 is a schematic perspective view showing the configuration of a light emitting device according to an embodiment of the present disclosure.
FIG. 8 is a schematic cross-sectional view taken along line VIII-VIII in
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
FIG. 1A shows the X-ray diffraction spectrum of the B₂ hexagonal boron nitride fibers of Example 2. FIG. 2 shows the X-ray diffraction spectrum of the hexagonal boron nitride fibers of Example 2, and that of the boron nitride fibers of Comparative Example 1 and Comparative Example
The hexagonal boron nitride fibers according to claim 1, wherein, in the diffraction peak, a ratio of a peak width at an intensity of 20% of a maximum peak intensity to a peak width at an intensity of 80% of the maximum peak intensity is 3.5 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average aspect ratio of the hexagonal boron nitride fibers is 1.5 or more and 150 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average fiber length of the hexagonal boron nitride fibers is 1 µm or greater and 100 µm or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average aspect ratio of the plate-like particles is greater than 1.0 and 200 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average major diameter of the plate-like particles is 0.1 µm or greater and 10 µm or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average thickness of the plate-like particles is 0.05 µm or greater and 5 µm or less. ∗ ∗ ∗ ∗ ∗
As shown in FIG. 1A, in the hexagonal boron nitride fibers of Example 2, the diffraction peak having the half-width of 0.62° considered to be attributed to the (0002) plane of hexagonal boron nitride was detected in the region where 2θ is around 26°. Further, as shown in FIG. 1B, the structure considered to be attributed to hexagonal boron nitride was detected in the region where 2θ is around 50°. As shown in FIG. 2, the boron nitride fibers of Comparative Example 1 and Comparative Example 2 exhibited broad diffraction peaks as compared to the hexagonal boron nitride fibers of What is claimed is:
The hexagonal boron nitride fibers according to claim 2, wherein, in the diffraction peak, a ratio of a peak width at an intensity of 20% of a maximum peak intensity to a peak width at an intensity of 80% of the maximum peak intensity is 3.5 or less.
Embodiments described in the patent, grouped by the materials and process steps they use.
1 material1 process step
Hexagonal boron nitride fibers of Example 2 were characterized by XRD. A diffraction peak with half-width of 0.62° attributed to the (0002) plane of hexagonal boron nitride was detected around 2θ=26°, and a structure attributed to hexagonal boron nitride was detected around 2θ=50°. Comparative Examples 1 and 2 exhibited broader diffraction peaks.
Materials described outside the worked examples.
melamine-based compound
boric acid
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
XRD FWHM of (0002) peak, Example 2 hBN fibers | 0.62 degrees (2θ) | BN |
XRD FWHM claimed upper limit for hBN fibers (claimed crystallinity criterion) |
Patents and literature cited by this patent (applicant and examiner references).
Cited patents · 10
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 12,421,113 B2Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
FIG. 2 shows X-ray diffraction spectra of the hexagonal boron nitride fibers of Example 2, the boron nitride fibers of Comparative Example 1 and the hexagonal …
FIG. 3A.
FIG. 4 is a diagram showing the reflectivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example 2, and …
FIG. 5A.
FIG. 6 is a graph showing the thermal conductivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example …
FIG. 7 is a schematic perspective view showing the configuration of a light emitting device according to an embodiment of the present disclosure.
FIG. 8 is a schematic cross-sectional view taken along line VIII-VIII in
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
FIG. 1A shows the X-ray diffraction spectrum of the B₂ hexagonal boron nitride fibers of Example 2. FIG. 2 shows the X-ray diffraction spectrum of the hexagonal boron nitride fibers of Example 2, and that of the boron nitride fibers of Comparative Example 1 and Comparative Example
The hexagonal boron nitride fibers according to claim 1, wherein, in the diffraction peak, a ratio of a peak width at an intensity of 20% of a maximum peak intensity to a peak width at an intensity of 80% of the maximum peak intensity is 3.5 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average aspect ratio of the hexagonal boron nitride fibers is 1.5 or more and 150 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average fiber length of the hexagonal boron nitride fibers is 1 µm or greater and 100 µm or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average aspect ratio of the plate-like particles is greater than 1.0 and 200 or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average major diameter of the plate-like particles is 0.1 µm or greater and 10 µm or less.
The hexagonal boron nitride fibers according to claim 1, wherein an average thickness of the plate-like particles is 0.05 µm or greater and 5 µm or less. ∗ ∗ ∗ ∗ ∗
As shown in FIG. 1A, in the hexagonal boron nitride fibers of Example 2, the diffraction peak having the half-width of 0.62° considered to be attributed to the (0002) plane of hexagonal boron nitride was detected in the region where 2θ is around 26°. Further, as shown in FIG. 1B, the structure considered to be attributed to hexagonal boron nitride was detected in the region where 2θ is around 50°. As shown in FIG. 2, the boron nitride fibers of Comparative Example 1 and Comparative Example 2 exhibited broad diffraction peaks as compared to the hexagonal boron nitride fibers of What is claimed is:
The hexagonal boron nitride fibers according to claim 2, wherein, in the diffraction peak, a ratio of a peak width at an intensity of 20% of a maximum peak intensity to a peak width at an intensity of 80% of the maximum peak intensity is 3.5 or less.
Embodiments described in the patent, grouped by the materials and process steps they use.
1 material1 process step
Hexagonal boron nitride fibers of Example 2 were characterized by XRD. A diffraction peak with half-width of 0.62° attributed to the (0002) plane of hexagonal boron nitride was detected around 2θ=26°, and a structure attributed to hexagonal boron nitride was detected around 2θ=50°. Comparative Examples 1 and 2 exhibited broader diffraction peaks.
Materials described outside the worked examples.
melamine-based compound
boric acid
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
XRD FWHM of (0002) peak, Example 2 hBN fibers | 0.62 degrees (2θ) | BN |
XRD FWHM claimed upper limit for hBN fibers (claimed crystallinity criterion) |
Patents and literature cited by this patent (applicant and examiner references).
Cited patents · 10
Related documents with shared materials, methods, properties, or citations.
boron oxide
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
FIG. 2 shows X-ray diffraction spectra of the hexagonal boron nitride fibers of Example 2, the boron nitride fibers of Comparative Example 1 and the hexagonal …
FIG. 6 is a graph showing the thermal conductivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example …
durability is provided. With reference to FIGS. 7 and 8, configuration of the light 60 emitting device will be described. FIG. 7 is a schematic perspective view showing the configuration of a light emit-ting device according to an embodiment of the present discl
| 2 degrees (2θ) |
BN |
XRD FWHM of amorphous fibrous BN precursor (definition threshold) | 2 degrees (2θ) | BN |
Thickness | 8–58 µm | — |
Thickness | 0.6–4 µm | — |
Thickness | 1–3 µm | — |
Thickness | 0.1–0.5 µm | — |
Temperature | 1000–1800 °C | — |
Duration | 900–86400 s | — |
Duration | 1–8 hours | — |
Duration | 2–6 hours | — |
Temperature | 5–100 °C | — |
Temperature | 25–95 °C | — |
Duration | 1–48 hours | — |
Duration | 15–36 hours | — |
Thickness | 360–700 nm | — |
Temperature | ≤ 900 °C | — |
Temperature | ≥ 500 °C | — |
Cited non-patent literature · 1
boron oxide
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
FIG. 2 shows X-ray diffraction spectra of the hexagonal boron nitride fibers of Example 2, the boron nitride fibers of Comparative Example 1 and the hexagonal …
FIG. 6 is a graph showing the thermal conductivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example …
durability is provided. With reference to FIGS. 7 and 8, configuration of the light 60 emitting device will be described. FIG. 7 is a schematic perspective view showing the configuration of a light emit-ting device according to an embodiment of the present discl
| 2 degrees (2θ) |
BN |
XRD FWHM of amorphous fibrous BN precursor (definition threshold) | 2 degrees (2θ) | BN |
Thickness | 8–58 µm | — |
Thickness | 0.6–4 µm | — |
Thickness | 1–3 µm | — |
Thickness | 0.1–0.5 µm | — |
Temperature | 1000–1800 °C | — |
Duration | 900–86400 s | — |
Duration | 1–8 hours | — |
Duration | 2–6 hours | — |
Temperature | 5–100 °C | — |
Temperature | 25–95 °C | — |
Duration | 1–48 hours | — |
Duration | 15–36 hours | — |
Thickness | 360–700 nm | — |
Temperature | ≤ 900 °C | — |
Temperature | ≥ 500 °C | — |
Cited non-patent literature · 1
boron oxide
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
FIG. 2 shows X-ray diffraction spectra of the hexagonal boron nitride fibers of Example 2, the boron nitride fibers of Comparative Example 1 and the hexagonal …
FIG. 6 is a graph showing the thermal conductivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example …
durability is provided. With reference to FIGS. 7 and 8, configuration of the light 60 emitting device will be described. FIG. 7 is a schematic perspective view showing the configuration of a light emit-ting device according to an embodiment of the present discl
| 2 degrees (2θ) |
BN |
XRD FWHM of amorphous fibrous BN precursor (definition threshold) | 2 degrees (2θ) | BN |
Thickness | 8–58 µm | — |
Thickness | 0.6–4 µm | — |
Thickness | 1–3 µm | — |
Thickness | 0.1–0.5 µm | — |
Temperature | 1000–1800 °C | — |
Duration | 900–86400 s | — |
Duration | 1–8 hours | — |
Duration | 2–6 hours | — |
Temperature | 5–100 °C | — |
Temperature | 25–95 °C | — |
Duration | 1–48 hours | — |
Duration | 15–36 hours | — |
Thickness | 360–700 nm | — |
Temperature | ≤ 900 °C | — |
Temperature | ≥ 500 °C | — |
Cited non-patent literature · 1
boron oxide
FIG. 1B is a partial enlarged graph of the X-ray diffraction spectrum of hexagonal boron nitride fibers of Example 2.
FIG. 2 shows X-ray diffraction spectra of the hexagonal boron nitride fibers of Example 2, the boron nitride fibers of Comparative Example 1 and the hexagonal …
FIG. 6 is a graph showing the thermal conductivity of the hexagonal boron nitride fibers of Example 2, the hexagonal boron nitride fibers of Comparative Example …
durability is provided. With reference to FIGS. 7 and 8, configuration of the light 60 emitting device will be described. FIG. 7 is a schematic perspective view showing the configuration of a light emit-ting device according to an embodiment of the present discl
| 2 degrees (2θ) |
BN |
XRD FWHM of amorphous fibrous BN precursor (definition threshold) | 2 degrees (2θ) | BN |
Thickness | 8–58 µm | — |
Thickness | 0.6–4 µm | — |
Thickness | 1–3 µm | — |
Thickness | 0.1–0.5 µm | — |
Temperature | 1000–1800 °C | — |
Duration | 900–86400 s | — |
Duration | 1–8 hours | — |
Duration | 2–6 hours | — |
Temperature | 5–100 °C | — |
Temperature | 25–95 °C | — |
Duration | 1–48 hours | — |
Duration | 15–36 hours | — |
Thickness | 360–700 nm | — |
Temperature | ≤ 900 °C | — |
Temperature | ≥ 500 °C | — |
Cited non-patent literature · 1