公开(公告)号：US20240217819A1

公开(公告)日：2024-07-04

申请号：US18283479

申请日：2022-03-22

Applicant: DENKA COMPANY LIMITED

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Tomonari MIYAZAKI ,  Takako ARAI

IPC: C01B21/064

CPC classification number: C01B21/0648

Abstract: A boron nitride powder that is an aggregate of boron nitride particles, wherein, when each of 20 boron nitride particles A that are selected from the boron nitride powder is crushed, a ratio of an average value Y (μm) to an average particle diameter X (μm) is 0.20 or more, wherein each of 20 boron nitride particles A is crushed by gradually applying a load at a loading rate of 0.7 mN/second in an arbitrary direction, the average particle diameter X (μm) is an average particle diameter of the boron nitride powder before applying the load, and the average value Y (μm) is displacement amounts in the direction of the boron nitride particles A until crushing.

公开(公告)号：US20240025741A1

公开(公告)日：2024-01-25

申请号：US18041934

申请日：2021-08-19

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

IPC: C01B21/064 ,  C08K7/00 ,  C08J3/20 ,  C09K5/14

CPC classification number: C01B21/064 ,  C08K7/00 ,  C08J3/203 ,  C09K5/14 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2006/32 ,  C08K2201/001 ,  C08K2201/004

Abstract: A boron nitride particle having a shape in which a diameter gradually increases from one end toward the other end. A boron nitride particle including a plurality of portions each having a shape in which a diameter gradually increases from one end toward the other end, in which the plurality of portions bond to each other on the other end side.

公开(公告)号：US20230294991A1

公开(公告)日：2023-09-21

申请号：US18041860

申请日：2021-08-19

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

IPC: C01B21/064 ,  C08K7/24 ,  C09C3/04

CPC classification number: C01B21/0645 ,  C08K7/24 ,  C09C3/041 ,  C01P2004/10 ,  C01P2002/72 ,  C01P2004/03 ,  C08K2201/004

Abstract: A boron nitride particle having a bent shape. A resin composition containing the boron nitride particle and a resin. A method for producing a resin composition including a step of preparing the boron nitride particle and a step of mixing the boron nitride particle with a resin.

公开(公告)号：US20240064895A1

公开(公告)日：2024-02-22

申请号：US18271284

申请日：2022-03-22

Applicant: DENKA COMPANY LIMITED

Inventor： Kenji MIYATA ,  Shohji IWAKIRI ,  Saori INOUE

IPC: H05K1/03 ,  H05K3/46 ,  C04B37/00 ,  C04B37/02

CPC classification number: H05K1/0306 ,  H05K3/4644 ,  C04B37/001 ,  C04B37/021 ,  H05K2201/0175 ,  H05K2203/085 ,  C04B2237/361 ,  C04B2237/68

Abstract: A circuit board having electrodes has good thermal conductivity and excellent voltage resistance and a method of producing the same. The circuit board includes a first ceramic layer, a second ceramic layer laminated thereon, and a first metal layer between the ceramic layers. The circuit board has a metal layer existing zone between the ceramic layers, and a metal layer non-existing zone having no metal layer between the ceramic layers. The ceramic layers join in the metal layer non-existing zone, and the second ceramic layer is a porous boron nitride layer having voids filled with a thermosetting composition cured material. The method includes disposing a second ceramic sheet on a first laminate metal layer including a first ceramic layer and the first metal layer laminated thereon, and pressurizing under heating. The second ceramic sheet is a porous boron nitride sheet having voids filled with a thermosetting composition semi-cured material.

公开(公告)号：US20230295399A1

公开(公告)日：2023-09-21

申请号：US18041830

申请日：2021-08-19

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

IPC: C08K3/38

CPC classification number: C08K3/38 ,  C08K2003/385

Abstract: A method for producing a boron nitride particle, including a step of disposing a mixture and a base material in a container formed of a carbon material, in which the mixture includes boron carbide and boric acid, and the base material is formed of a carbon material and a step of generating a boron nitride particle on the base material by heating and pressurization with a nitrogen atmosphere formed in the container. A boron nitride particle having a maximum length of 80 μm or longer, and an aspect ratio of 1.5 or more.

公开(公告)号：US20240253989A1

公开(公告)日：2024-08-01

申请号：US18040588

申请日：2021-08-19

Applicant: Denka Company Limited

Inventor： Mana YAMAMOTO ,  Kenji MIYATA ,  Yusuke SASAKI

IPC: C01B21/064 ,  C08K3/38

CPC classification number: C01B21/0648 ,  C08K3/38 ,  C01P2002/74 ,  C01P2004/03 ,  C01P2004/45 ,  C01P2006/90 ,  C08K2003/385 ,  C08K2201/004

Abstract: A boron nitride particle having a long and thin shape, in which, when the boron nitride particle is subjected to a loading and unloading test comprising a loading step and unloading step in this order, at least a part of a length in the lateral direction of the boron nitride particle compressed in the loading step returns in the unloading step, in which the loading step includes gradually applying a load from 0.2 mN up to 20 mN at a loading rate of 0.27 mN/second in a lateral direction of the boron nitride particle to compress the boron nitride particle, and the unloading step includes gradually unloading the boron nitride particle to 0.2 mN at an unloading rate of 0.27 mN/second.

公开(公告)号：US20240158230A1

公开(公告)日：2024-05-16

申请号：US18283624

申请日：2022-03-22

Applicant: DENKA COMPANY LIMITED

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Kei KUBOBUCHI ,  Takako ARAI

IPC: C01B21/064 ,  C08K3/38

CPC classification number: C01B21/064 ,  C08K3/38 ,  C01P2004/03 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/16 ,  C01P2006/21 ,  C01P2006/32 ,  C08K2003/385 ,  C08K2201/003 ,  C08K2201/006

Abstract: A method for producing a boron nitride particle, including: a step of pressurizing and heating a particle containing boron carbide under a nitrogen atmosphere to obtain a particle containing boron carbonitride; a step of putting a mixture containing a boron source containing at least one selected from the group consisting of boric acid and boron oxide and the particle containing boron carbonitride into a container; and a step of pressurizing and heating the mixture under a nitrogen atmosphere in a state where airtightness in the container has been enhanced to obtain a boron nitride particle, wherein an amount of boron atoms in the boron source is 1.0 to 2.2 mol with respect to 1 mol of the boron carbonitride in the mixture.

公开(公告)号：US20230132023A1

公开(公告)日：2023-04-27

申请号：US17906906

申请日：2021-03-29

Applicant: Denka Company Limited

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA ,  Seiji SHIRAISHI

IPC: C01B21/064

Abstract: A method for producing an aggregated boron nitride particle, containing: a nitriding step of nitriding a particle containing boron carbide to obtain a particle containing boron carbonitride; and a decarburizing step of decarburizing the particle containing boron carbonitride to obtain an aggregated boron nitride particle, wherein, in the nitriding step, nitriding is performed so that boron carbide remains inside the particle containing boron carbonitride, and wherein, in the decarburizing step, the boron carbide remaining inside the particle containing boron carbonitride is removed.

公开(公告)号：US20230017856A1

公开(公告)日：2023-01-19

申请号：US17784959

申请日：2020-12-11

Applicant: DENKA COMPANY LIMITED

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Michiharu NAKASHIMA

IPC: C08J5/18 ,  C08K3/38 ,  C01B21/064 ,  H01L23/36

Abstract: A method of producing a resin sheet, including: mixing blocky boron nitride particles A, blocky boron nitride particles B, and a resin composition, and molding the resin composition to a sheet form and pressurizing the sheet form resin composition, the boron nitride primary particles a having a length in a shorter direction of 0.7 μm or less, the boron nitride primary particles b having a length in a shorter direction of 1 μm or more, the blocky boron nitride particles A having an average particle diameter of 30 μm or more, the blocky boron nitride particles B having an average particle diameter that is smaller than the average particle diameter of the blocky boron nitride particles A, the compressive strengths ratio of the blocky boron nitride particles A to the blocky boron nitride particles B being 1.2 or more. Thus, the thermal conductivity of a resin sheet can be enhanced.

公开(公告)号：US20240174908A1

公开(公告)日：2024-05-30

申请号：US18283482

申请日：2022-03-22

Applicant: DENKA COMPANY LIMITED

Inventor： Yusuke SASAKI ,  Kenji MIYATA ,  Kei KUBOBUCHI ,  Tomonari MIYAZAKI

IPC: C09K5/14 ,  C01B21/064 ,  C08K3/38

CPC classification number: C09K5/14 ,  C01B21/0646 ,  C08K3/38 ,  C01P2004/03 ,  C01P2004/50 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/16 ,  C01P2006/21 ,  C01P2006/32 ,  C08K2003/385 ,  C08K2201/001 ,  C08K2201/005

Abstract: A boron nitride powder that is an aggregate of boron nitride particles, wherein the boron nitride powder has a BET specific surface area of 4.6 m2/g or more, and an average pore diameter of 0.65 μm or less. A resin composition containing: the boron nitride powder, and a resin.