公开(公告)号：US20220177377A1

公开(公告)日：2022-06-09

申请号：US17598832

申请日：2020-03-27

Applicant: DENKA COMPANY LIMITED

Inventor： Yuta TSUGAWA ,  Seiji KOBASHI ,  Koji NISHIMURA

IPC: C04B35/584 ,  H01L23/373 ,  C04B37/02 ,  G01N23/223

Abstract: A silicon nitride substrate includes silicon nitride and magnesium, in which when a surface of the silicon nitride substrate is analyzed with an X-ray fluorescence spectrometer under the specific Condition I, XB/XA is 0.8 or more and 1.0 or less.

公开(公告)号：US20220098121A1

公开(公告)日：2022-03-31

申请号：US17426930

申请日：2020-01-30

Applicant: DENKA COMPANY LIMITED

Inventor： Akimasa YUASA ,  Yoshiyuki ESHIMA ,  Ryuhei WATANABE ,  Seiji KOBASHI ,  Koji NISHIMURA

IPC: C04B41/00 ,  C04B35/584 ,  B28B11/14 ,  B28B11/24

Abstract: A method for manufacturing a single sheet-type green sheet includes a transporting step of transporting a strip-shaped green sheet that contains ceramic along a longitudinal direction thereof, and an irradiation step of irradiating the transported strip-shaped green sheet with a laser beam to cut the strip-shaped green sheet, thereby obtaining a single sheet-type green sheet.

公开(公告)号：US20220147723A1

公开(公告)日：2022-05-12

申请号：US17434840

申请日：2020-02-28

Applicant: DENKA COMPANY LIMITED

Inventor： Akimasa YUASA ,  Seiji KOBASHI ,  Koji NISHIMURA

IPC: G06K1/12 ,  G06K7/14 ,  H01L23/15

Abstract: A ceramic green sheet including a plurality of substrate forming regions. A barcode or a two-dimensional code is drawn in a portion of the ceramic green sheet. The barcode or the two-dimensional code is obtained by encoding one or more of the following information. Information relating to raw materials used when the ceramic green sheet is produced, information relating to molding conditions of the ceramic green sheet, information relating to a release agent used when a plurality of the ceramic green sheets are stacked, or a serial number.

公开(公告)号：US20230142330A1

公开(公告)日：2023-05-11

申请号：US17908817

申请日：2021-03-26

Applicant: Denka Company Limited

Inventor： Koki IKARASHI ,  Makoto TAKEDA ,  Seiji KOBASHI ,  Koji NISHIMURA

IPC: C04B41/48 ,  C09K5/14 ,  C04B35/583 ,  C04B35/63 ,  C04B35/64 ,  C04B38/00 ,  C04B41/83

CPC classification number: C04B41/4853 ,  C09K5/14 ,  C04B35/583 ,  C04B35/6303 ,  C04B35/64 ,  C04B38/0054 ,  C04B41/83 ,  C04B2235/386 ,  C04B2235/3409 ,  C04B2235/442 ,  C04B2235/5436 ,  C04B2235/6567 ,  C04B2235/77 ,  H05K1/0373

Abstract: Provided is a boron nitride sintered body including: a plurality of coarse particles each having a length of 20 μm or more; and fine particles smaller than the plurality of coarse particles, in which, when viewed in a cross-section, the plurality of coarse particles intersect with each other. Provided is a method for manufacturing a boron nitride sintered body, the method including: a raw material preparation step of firing a mixture containing boron carbonitride and a boron compound in a nitrogen atmosphere to obtain lump boron nitride having an average particle diameter of 10 to 200 μm; and a sintering step of molding and heating a blend containing the lump boron nitride and a sintering aid to obtain a boron nitride sintered body including coarse particles each having a length of 20 μm or more in a cross-section and fine particles smaller than the coarse particles.

公开(公告)号：US20230085806A1

公开(公告)日：2023-03-23

申请号：US17908786

申请日：2021-03-26

Applicant: Denka Company Limited

Inventor： Koki IKARASHI ,  Makoto TAKEDA ,  Seiji KOBASHI ,  Koji NISHIMURA

IPC: C04B35/583 ,  C04B41/48 ,  C04B41/83

Abstract: Provided is a boron nitride sintered body including boron nitride particles and pores, the boron nitride sintered body having a sheet shape and a thickness of less than 2 mm. Provided is a method for manufacturing a boron nitride sintered body, the method including a sintering step of molding and heating a blend containing a boron carbonitride powder and a sintering aid to obtain a sheet-shaped boron nitride sintered body including boron nitride particles and pores, in which a thickness of the boron nitride sintered body obtained in the sintering step is less than 2 mm.

公开(公告)号：US20230146575A1

公开(公告)日：2023-05-11

申请号：US17907515

申请日：2021-03-26

Applicant: Denka Company Limited

Inventor： Koki IKARASHI ,  Nobuya SUZUKI ,  Koji NISHIMURA ,  Makoto TAKEDA ,  Seiji KOBASHI

IPC: C04B35/583 ,  C04B35/628 ,  C04B35/63 ,  C04B35/64 ,  C04B41/83 ,  C04B41/48 ,  C04B41/00

CPC classification number: C04B35/583 ,  C04B35/62884 ,  C04B35/62836 ,  C04B35/6303 ,  C04B35/64 ,  C04B41/83 ,  C04B41/4853 ,  C04B41/0072 ,  C04B2235/386 ,  C04B2235/3856 ,  C04B2235/3409 ,  C04B2235/442 ,  C04B2235/5436 ,  C04B2235/963

Abstract: Provided is a boron nitride sintered body having a porous structure, the boron nitride sintered body including a lump particle formed by aggregation of primary particles of boron nitride and having a particle diameter of 15 μm or more. Provided is a method for manufacturing a boron nitride sintered body, the method including: a nitriding step of firing a raw material powder containing boron carbide in an atmosphere containing nitrogen to obtain a fired product including lump particles each having a core part with primary particles of boron carbonitride aggregated and a shell part surrounding the core part; and a firing step of molding and heating a blend containing the fired product including lump particles and a sintering aid to obtain the boron nitride sintered body having a porous structure and including lump particles of boron nitride.

公开(公告)号：US20220161366A1

公开(公告)日：2022-05-26

申请号：US17438787

申请日：2020-03-12

Applicant: DENKA COMPANY LIMITED

Inventor： Akimasa YUASA ,  Yoshiyuki ESHIMA ,  Daiki FUJIYOSHI ,  Seiji KOBASHI ,  Koji NISHIMURA

IPC: B23K26/364 ,  B28D5/04 ,  C04B41/00 ,  C04B41/53 ,  C04B41/91 ,  C04B35/584 ,  C04B35/581

Abstract: A scribe line is formed on a first surface of a nitride ceramic base material by a laser. Next, the nitride ceramic base material is divided along the scribe line. The scribe line includes a plurality of recessed portions. The plurality of recessed portions are formed in a row on the first surface of the nitride ceramic base material. A depth of each of the plurality of recessed portions is equal to or greater than 0.70 times and equal to or smaller than 1.10 times an opening width of each of the plurality of recessed portions. The opening width of each of the plurality of recessed portions is equal to or greater than 1.00 times and equal to or smaller than 1.10 times an inter-center distance of the plurality of recessed portions.